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Table of Contents

Configuring VISM Cards

Configuring VISM Cards

The VISM module performs voice internetworking service module functions. This chapter describes dialogs that show configuration information for

Selecting and Displaying Card Parameters

Select the VISM card to display card configuration dialogs by doing one of the following:

The VISM Card Category menu contains the following dialogs:

Note   Some of these dialogs have sub-dialogs.

Card Configuration

Use the VISM Card Configuration dialog to view VISM card characteristics, hardware, firmware, and status information (See Figure 12-1.)


Figure 12-1: VISM Card Configuration Dialog


The parameters are described in Table 12-1.


Table 12-1: Card Configuration Dialog Parameters
Parameter Description

Slot Number

Number of the current slot containing the card.

Card Type

Current card type. In this case, it is a VISM.

Card State

Front card status. Can be one of the following options:

  • nocard

  • standby

  • active

  • failed

  • selfTest

  • heldInReset

  • boot

  • mismatch

  • unknown

  • coreCardMisMatch

  • blocked

  • reserved

  • hold

Front Card Description

Description of the front card.

Front Card Serial No

Serial number of the front card.

Card Hardware Revision

Current card hardware revision.

Card Firmware Revision

Current card firmware revision.

MIB Version Number

MIB version number updated when any part of the MIB changes.

Card Reset Reason

Reason for the last card reset. Can be Powerup, parityError, watchDog, resource, clrAll, missingTask.

Line Module Type

Current line module number. In this case, it is an lm-RJ48-8T1.

Line Module State

Current back card state. Can be one of the following:

  • notPresent

  • Present

  • invalid

Line Module Description

Description of the current back card.

Line Module Serial Number

Serial number of the current back card.

Line Module Hardware Revision

Hardware revision of the current back card.

Line Module Firmware Revision

Firmware revision of the current back card.

Config Chng Type BitMap

Configuration change Type BitMap used in vismTableChanged trap and vismScalarChanged trap.

When used in vismTableChanged trap, the bits are interpreted:

  • bit 0 set = mgcTable changed

  • bit 1 set = mgEndpointTable changed

  • bit 2 set = mgcResolutionTable changed

  • bit 3 set = srcpPeerTable changed

  • bit 4 set = vismDsx1Table changed

  • bit 5 set = vismXgcpPeerTable changed

  • bit 6 set = xgcpPackageTable changed

  • bit 7 set = vismChanCacTable changed

  • bit 8 set = vismCasVariantTable changed

  • bit 9 set = vismCasXgcpVariantTable changed

  • bit 10 set = vismAal2CidCnfTable changed

  • bit 11 set = dsx0VismCnfTable changed

  • bit 12 set = vismHdlcChanCnfTable changed

  • bit 13 set = lineAssignmentTable changed

  • bit 14 set = vismCodecCnfTable changed

When used in vismScalarChanged trap, the bits indicate

  • bit 0 set = mediaGateway group changed

  • bit 1 set = mediaGatewayEndpoint group changed

  • bit 2 set = mediaGatewayControllerResolution group changed

  • bit 3 set = srcpAdminObjects group changed

  • bit 4 set = vismConfig group changed

  • bit 5 set = vismXgcpCoreObjects group changed

  • bit 6 set = xgcpCoreObjects group changed

  • bit 7 set = xgcpExtensionObjects group changed

  • bit 8 set = xgcpPackageObjects group changed

The default value is 0, no change

Note   This MIB makes sense only in traps. A GET on this may not return a Useful result.

Card Integrated Alarm

Bit position represents the different types of alarm.

For ASC:

  • bit 0: ShelfFunctionModuleState (BNM only) (failed/boot/mismatch/heldinReset)

  • bit 1: LineModuleState (BNM only) (notPresent/invalid)

  • bit 2: ASMPhysicalAlarmState (BNM only)

  • bit 3: ATMLMIFailure (ASC only)

  • bit 4: LineAlarmState (BNM only)

  • bit 5: LineStatisticalAlarmState (BNM only)

  • bit 6: PLCPAlarmState (BNM only)

  • bit 7: PLCPStatisticalAlarmState (BNM only)

  • bit 8: SmConnectionFailureAlarm

For SM:

  • bit 0: ShelfFunctionModuleState (failed/boot/mismatch/heldinReset)

  • bit 1: LineModuleState (notPresent/invalid)

  • bit 2: PortLMIFailure

  • bit 3: LineAlarmState

  • bit 4: LineStatisticalAlarmState

  • bit 5: FrameRelayPortState (RemoteLoopback/ FailedDueToLine/FailedDueToSig)

  • bit 6: ChannelState

For PXM/SRM Only (MGX8850 Platfrom):

  Only those marked with SRM are valid for both PXM/SRM. The rest are valid only for PXM.

  • bit 0: ShelfFunctionModuleState

  • bit 1: Backcard Line Module (SRM/PXM)

  This Alarm is generated when the Line Module(Trunk Backcard) is removed or goes to a mismatch state(or backcard type is unknown).

  • bit 2: Backcard UIModule

  This Alarm is generated when the UI backcard is removed or goes to a mismatch state(or backcard type is unknown).

  • bit 3: ASM Physical Alarm

  This specifies whether any of the environmental monitoring components like Temperature, Voltage Supply, Fan Speed have gone into alarm.

  • bit 4: ATM LMI Failure

  • bit 5: Line Alarm (SRM/PXM)

  • bit 6: Line Statistical Alarm (SRM/PXM)

  • bit 7: Lines Alarm (SRM/PXM)

  • bit 8: PLCP Alarm

  • bit 9: PLCP Statistical Alarm

  • bit 10: Connections exist on removed SM

  • bit 11: Disk related Failure on first PXM slot

  • bit 12: Disk related Failure on second PXM slot

  The Disk Alarms are generated when any of the file operations on Disk like open,read,write,lseek etc fail.

VSM Alarms:

bit 13: Port LMI Failure

bit 14: Port State Alarm

bit 15: Channel Shelf Alarm

bit 16: Taskmon Task Suspended

bit 17: Excess Power Consumption

bit 30: bit set(1) major alarm, else (0) minor alarm

The default value is 0.

VISM Features

Use the VISM Features dialog to view VISM card features (See Figure 12-2.)


Figure 12-2: VISM Features Dialog


The parameters are described in Table 12-2.


Table 12-2: VISM Features Dialog Parameters
Parameter Description

IP Address

IP address of the VISM card. The address is required to communicate with the Call agent. The IP address should be configured before adding endpoints.

SubNet Mask

The sub-netmask of the VISM IP interface.

Daughter Card Serial Num

A unique value for each VISM daughter card, entered in nvram by manufacturing. The serial number is on the non-volatile RAM on the VISM daughter card.

Daughter Card Desc

Describes the VISM daughter card.

Daughter Card HW Rev

Hardware revision number for the daughter card.

vismDspHealth

The health of the DSPs as a percentage of the total DSPs currently functional.

Ecan Encoding

Voice encoding type, Mu-law or A-law. Mu-law is returned for T1 lines and A-law is returned for E1 lines.

Comp Packet (bytes)

Compressed output packet size. This value is used in the DSP interface API commands to configure the DSPs for the maximum packet size.

The valid values are 80 and 160 only.

Note   In the future this parameter will be applicable only in VoAAL1 mode.

The default value is 80.

Echo Return Loss

Provisions the return echo lost, i.e the db loss of the echo that the DSPs are supposed to cancel.

The default value is 6 db.

Jitter Delay Mode

Provisions the jitter buffer mode to apply to a call connection. Possible values are

  • Fixed—use a constant jitter buffer size, which is defined by the vismJitterInitialDelay mib variable.

  • Adaptive—let the DSP pick the optimal value for the call connection.

The default value is fixed.

vismJitterInitialDelay

Defines the jitter buffer size. If the vismJitterDelayMode is set to fixed, the jitter buffer is fixed at this value for the call. If vismJitterDelayMode is adaptive, this is the initial jitter buffer size, and the DSP will adapt to an optimal size.

The valid range is from 1 - 100.

The valid increments for template 1 include: 1, 10, 20,30, 40, 50, 60, 70, 80, 90, 100.

The valid increments for template 2 include: 1, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100.

When the template of the card changes, either from template 1 to template 2, or vice versa, the value will be implicitly set to 60 (the default value).

Adaptive Gain Control

If set to on, the DSP will adjust the gain of the of the call connection to an optimal value.

The default value is off.

Switching Mode

The connection model for the VISM card. After this parameter is modified, theVISM card resets to operate in the specified mode. The features of each mode:

  • voipSwitching—VoIP mode

  VISM interacts with the Call Agent using XGCP protocol, bearer path is VoIP (AAL5). Currently this mode offers CAS Backhaul feature. This mode corresponds to VISM release 1.5 Utah and 1.5 South Carolina.

  • aal2Trunking—AAL2 Trunking mode

  VISM does not interact with the Call Agent. Bearer Path is AAL2. Currently this mode offers trunking of CAS & PRI signaling. This mode corresponds to VISM release 1.5 Alabama.

  • aal1Svc—AAL1 SVC mode

  VISM interacts with Call Agent using XGCP protocol over AAL5 control PVCs. In this mode, bearer path is VoAAL1 and the bearer connections are SVCs. i.e VISM dynamically sets-up and tears down bearer connections. This value is applicable in VISM2.0 and onwards.

The default value is voipSwitching

Note   Only the CLI command, cnfvismmode can modify this parameter.

CAC Enable/Disable

Determines whether CAC (Connection Admission Control) functionality is applied on the VISM card; this is done on a per PVC basis. For some applications, the CAC functionality may not be required and in that case, it has to be disabled on a card basis.

The default value is enable.

Available Ds0 endpoints

Number of DS0s available for new connections on VISM. This is modified by the VISM firmware after each connection is set up.

Codec Template Selection

The Codec template currently configured on the VISM card. The value refers to an index to the vismCodecTemplate table. This template is applicable for all connections on the card.

Before a template switch can occur, the number of channels (endpoints) in use will be checked to ensure the switch will not occur if there are more endpoints active at the present time than what the new template (vismCodecTemplateMaxChanCount) allows.

Also, whenever an attempt is made to add a new endpoint for any template, this template maximum number will limit the number of endpoints that may be added for this template.

vismTftpServerDn

Holds the domain name of the tftp server from where the cas module will download the cas files.

Currently the domain name is resolved internally using the mgcResolutionTable. Hence the domain name has to be added in the mgcResolutionTable before configuring this parameter. The MGC domain name cannot be configured as a tftp server.

When the last entry corresponding to the tftp domain is deleted from the mgcResolutionTable, the vismTftpSeverDn name is implicitly deleted and the config change trap will be sent.

Note   This parameter is not applicable in aal2 trunking mode.

VOIP Parameters

Use the VOIP Parameters dialog to configure the type of service (See Figure 12-3.)


Figure 12-3: VOIP Parameters Dialog


The parameters are described in Table 12-3.


Table 12-3: VOIP Parameters Dialog Parameters
Para,meter Descriptiom

Control Tos

Used to provision the bitmask used for the TOS (Type of Service) octet for cells carrying the control (xGCP) traffic. The default value is 96 = 0x60 => Precedence = 3. TOS nibble = 0. The bitmask can be only a byte value.

VoIP Bearer

Used to provision the bitmask used for the TOS (Type of Service) octet for cells carrying VOIP bearer (RTP) traffic. The default value is 160 = 0xA0=> Precedence = 5. TOS nibble = 0. The bitmask can be only a byte value.

RTCP Report Interval

Defines the RTCP report interval (defined in RFC 1889). The interval at which the RTCP reports should be sent to participating members. The RTCP reports are not sent at a fixed rate at this interval. Rather, this value is used as a base value to arrive at a random number between 0.5 and 1.5 times this value.

This interval timer also serves the purpose of RTP packets receive timer. At every 5 times this interval, a check is made on a VOIP connection (which is in SENDRECV or RECVONLY x GCP modes) to see if any RTP packets have been received. If not, gateway-initiated DLCX should be sent to the Call Agent.

Currently, this interval timer is a card-specific value, which means the value is configurable on a per card basis and not on a per call basis.

RTP Rcv Timer

Determines if the RTP packets receive timer on VISM needs to be enabled. For some VOIP applications, if a connection is in send-recv mode, after the bearer cut-through is done, the RTP stream should be monitored for RTP packets. If there are no packets received within a time interval specified by 5 seconds, then a Gateway initiated DLCX (Delete connection) should be sent on that connection.

If enabled, the RTP stream is monitored.

SGCP/MGCP

Use the following dialogs to configure SGCP/MGCP protocol parameters.

SGCP/MGCP Parameters

Use the SGCP/MGCP Parameters dialog to configure message transmission parameters (See Figure 12-4.)


Figure 12-4: SGCP/MGCP Parameters Dialog


The parameters are described in Table 12-4.


Table 12-4: SGCP/MGCP Dialog Parameters
Parameter Description

Request Timeout

Determines the timeout value used for retransmitting unacknowledged message.

It is the responsibility of the requesting entity to provide suitable timeouts for all outstanding commands, and to retry commands when timeouts exceeded.

The default value is 500 milliseconds.

Request Retries

The number of retries for a request that exceeds timeout. It is the responsibility of the requesting entity to provide suitable timeouts for all outstanding commands, and to retry when times out.

The default value is 3.

RSIP Restart Delay

The Restart Delay Timeout for the restart process.

The purpose of setting the restart timer before sending the Restart In Progress notification to the media gateway controller is to avoid the network congestion during the critical period of service restoration.

-1: infinity which indicates no timeout.

0: immediate timeout which indicates immediate shutdown.

The default value is -1.

RSIP Max Waiting Delay

The maximum waiting delay (MWD) timeout value is used for the Media Gateway to send the Restart In Progress to the Media Gateway Controller.

The default value is chosen in an implementation-dependent manner by the MGCP functionality based on the call volume of the system.

Default Package

Contains the default package name for the MGCP/SGCP protocol and it should have the same value as xgcpCapabilityPackageName.

SGCP/MGCP Packages

Use the SGCP/MGCP Packages dialog to specify the availability of packages. (See Figure 12-5.)


Figure 12-5: SGCP/MGCP Packages Dialog


The parameters are described in Table 12-5.


Table 12-5: SGCP/MGCP Packages Dialog Parameters
Parameter Descriptiom

Package Name

Capability Package letter names:

Generic Media Package—G

DTMF package—D

MF Package—M

Trunk Package—T

Line Package—L

Handset Package—H

RTP Package—R

Network Access Server Package—N

Announcement Server Package—A

Script Package—S

Enabled

Enables/disables the Package Capability.

SGCP/MGCP Peers

Use the SGCP/MGCP Peers dialog to configure peer entries. (See Figure 12-6.)


Figure 12-6: SGCP/MGCP Peers Table


The parameters are described in Table 12-6.


Table 12-6: SGCP/MGCP Peers Table Parameters 
Parameter

Description

 Peer Number


 The value is the same as mgcNumber from MGMIB.


 Protocol Number


 The value is the same as mgcProtocolNumber from MGMIB. (Serves as an index to this table?)


 UDP Port


 Configures the local UDP port used by the SGCP and MGCP protocols to communicate with the call agent. This parameter together with vismIpAddress identifies the local end of an SGCP/MGCP connection.


 The default value is 2427.

SGCP/MGCP Messages

Use the SGCP/MGCP Messages dialog to configure peer message statistics (See Figure 12-7.)


Figure 12-7: SGCP/MGCP Messages Table


The parameters are described in Table 12-7.


Table 12-7: SGCP/MGCP Messages Table Parameters
Para,meter Description

Message Success Count

The number of successful messages that communicate with the Media Gateway Controller on that IP address. Successful messages apply to both transmit and receive messages.

Transmit: Positive ACK is received from the Media Gateway Controller

Receive: Positive ACK is sent to the Media Gateway Controller. This implies that the format of the message is correct and the request can be fulfilled.

MGP IP Address

The IP address of the Media Gateway Controller. The value of this parameter is the same as xgcpIpAddress of XGCP-MIB.

Message Fail Count

The count of failed messages that communicate with the Media Gateway Controller on that IP address. Failed messages apply to both transmit and receive messages.

Transmit: Either NAK is received from the MGC or message times out waiting for ACK.

Receive: Format of the received message is bad or the request can not be fulfilled.

SGCP/MGCP Message Counts

Use the SGCP/MGCP Message Counts table to configure message statistics. (See Figure 12-8.)


Figure 12-8: SGCP/MGCP Message Counts Table


The parameters are described in Table 12-8.


Table 12-8: SGCP/MGCP Message Counts Table Parameters
Parameter Description

IP Address

The IP address of the Media Gateway Controller. The value of this parameter is the same as xgcpIpAddress of XGCP-MIB.

CRCX

The count of CRCX (Create Connection) messages received from the call agent since reset.

MDCX

The count of MDCX (Modify Connection) messages received from the call agent since reset.

DLCX Recv

The count of DLCX (Delete Connection) messages received from the call agent since reset.

DLCX Sent

The count of DLCX (Delete Connection) messages sent to the call agent since reset.

RQNT

The count of RQNT (Request Notify) messages received from the call agent since reset.

NTFY

The count of NTFY (Notify) messages sent to the call agent since reset.

AUEP

The count of AUEP (Audit Endpoint) messages received from the call agent since reset.

AUCX

The count of AUCX (Audit Connection) messages received from the call agent since reset.

RSIP

The count of RSIP (Restart In Progress) messages sent to the call agent since reset.

SGCP/MGCP Failures

Use the SGCP/MGCP Failures table to configure message failure statistics. (See Figure 12-9.)


Figure 12-9: SGCP/MGCP Failures Table


The parameters are described in Table 12-9.


Table 12-9: SGCP/MGCP Failures Table Parameters
Parameter Description

IP Address

Denotes the IP Address of the entity. Once the row has become active, this value may not be changed. To change the IP address, an entry will have to be removed and a new entry will have to be added.

CRCX Fail

This refers to the count of CRCX (Create Connection) messages received from the call agent that were responded to with a failure return code.

MDCX Fail

This refers to the count of MDCX (Modify Connection) messages received from the call agent that were responded to with a failure return code.

DLCX Recv Fail

This refers to the count of DLCX (Delete Connection) messages received from the call agent that were responded to with a failure return code.

DLCX Sent Fail

This refers to the count of DLCX (Delete Connection) messages sent to the call agent since reset.

RQNT Fail

This refers to the count of RQNT (Request Notify) messages received from the call agent that were responded to with a failure return code.

NTFY Fail

This refers to the count of NTFY (Notify) messages sent to the call agent for which a response with failure return code was received or which timed out waiting for a response.

AUEP Fail

This refers to the count of AUEP (Audit Endpoint) messages received from the call agent that were responded to with a failure return code.

AUCX Fail

This refers to the count of AUCX (Audit Connection) messages received from the call agent that were responded to with a failure return code.

RSIP Fail

This refers to the count of RSIP (Restart In Progress) messages sent to the call agent for which a response with failure return code was received or which timed out waiting for a response.

SRCP

The following set of dialogs control administration and configuration of the SRCP protocol.

SRCP Parameters

Use the following parameters to coordinate SRCP communications with the call agent (See Figure 12-10.)


Figure 12-10: SRCP Parameters Dialog


The parameters are described in Table 12-10.


Table 12-10: SRCP Parameters Dialog Parameters 
Parameter

Description

 SRCP version


 The name of the SRCP protocol version. E.g. SRCP 1.0.2. If MGMIB is supported, this name corresponds to mgProtocolName in an entry to mgSupportedProtocolTable.


 Port number


 Configures the UDP port used for SRCP on the system (local UDP port). It is configurable only if the system is in a locked or disabled state (i.e If MGMIB is supported, mgAdministrativeState should b e "locked" before the UDP port can be configured).

SRCP Peers

The SRCP peer administration table contains a set of parameters for each SRCP peer/Media Gateway Controller.


Figure 12-11: SRCP Peers Table


The parameters are described in Table 12-11.


Table 12-11: SRCP Peers Table Parameters
Parameter Description

Peer Name

Denotes the name of the SRCP peer. If MGMIB is supported, this is the same as the mgcName from the mgcTable. It is provided here as a read-only parameter as a convenience feature.

Peer ID

Identifies the SRCP peer and serves as index to this table. If MGMIB is supported, this is the same as the mgcNumber from the mgcTable.

Port Number

Configures the UDP port of the SRCP peer.

Heartbeat Interval

Configures the length of the heartbeat interval, in milliseconds. If 0, heartbeat for this peer is not monitored. The heartbeat interval less than 100 is not allowed (except 0).

Last Heartbeat

The time since the last heartbeat was received, in milliseconds. This represents the difference between the current time and the last time an SRCP command was received.

A value of 0 shall be returned if the heartbeat is not monitored.

Even if the heartbeat is monitored, a value of 0 shall be returned if any of the following is true:

  • The system is locked or disabled (as indicated by mgAdministrativeState of MGMIB or xgcpOperStatus of XGCP MIB).

  • The srcpPeer is unassociated (as indicated by mgcAssociationState of MGMIB).

Max PDU Size

Configures the maximum UDP PDU size, in octets, that may be used for SRCP communications with the peer.

This value may not be configurable for all agents.

SRCP Peers Statistics

The SRCP Peers Statistics table contains statistics concerning SRCP communications with a particular peer/Media Gateway Controller.


Figure 12-12: SRCP Peers Statistics Table


The parameters are described in Table 12-12.


Table 12-12: SRCP Peers Statistics Table Parameters
Parameter Description

MGC Name

Denotes the name of the media gateway controller. This corresponds to a domain name under which the MGC could also be registered in a DNS.

IP

The IP address of the SRCP peer and serves as index to the table.

Bad Packets

The number of objects that were received and discarded. The packets may get discarded because of indecipherable PDUs like bad protocol version, bad command verb etc., or because of unknown transaction IDs (in case of SRCP clients).

AUGW In

The total AUGW commands received from the peer on this IP address.

AUGW Fail

Media gateway: The total AUGW commands received that were responded to with a failure return code.

Media gateway controller: The total number of AUGW commands sent which were timed out without a response or for which a response with failure return code was received.

AULN In

The total number of AULN commands received from or sent to the peer on this IP address.

AULN Fail

Media gateway: The total number of AULN commands received that were responded to with a failure return code.Media gateway controller: The total number of AULN commands sent which were timed out without a response or for which a response with failure return code was received.

NTFY In

The total number of NTFY commands received from or sent to the peer on this IP address.

NTFY Fail

Media gateway: The total number of NTFY commands sent which were timed out without a response or for which a response with failure return code was received.

Media gateway controller: The total number of NTFY commands received that were responded to with a failure return code.

RQNT In

The total RQNT commands received from or sent to the peer on this IP address.

RQNT Fail

Media gateway: The total RQNT commands received that were responded to with a failure return code.

Media gateway controller: The total RQNT commands sent which were timed out without a response or for which a response with failure return code was received.

Media Gateway

The following dialog s are used to configure the Media Gateway Controller protocol.

Media Gateway Parameters

The Media Gateway parameters pertain to the media gateway as a whole, such as global parameters and state (See Figure 12-13.)


Figure 12-13: Media Gateway Parameters Dialog


The parameters are described in Table 12-13.


Table 12-13: Media Gateway Dialog Parameters
Parameter Description

Media Gateway Name

Denotes name of the media gateway, as it is identified by media gateway controllers. This corresponds to a domain name under which the Media Gateway could also be registered in a DNS.

Admin State

Indicates the current admin state of the Media Gateway. The possible admin states are

  • inService— Media gateway is ready to provide service. In this state, Media Gateway will respond to connection control requests, emit autonomous messages to Media Gateway Controllers as applicable, etc.

  • commandedOutOfService—Media Gateway does not provide service and all resources have been released. In this state, Media Gateway will not respond to any connection control requests nor emit autonomous messages.

  • pendingOutOfService—This is a transitional state prior to going outOfService. In this state the Media Gateway provides service but does not accept new service requests (i.e creation of connections); will transition to outOfService according to mgShutDownGraceTime.

Admin State Control

This control parameter is used to change the service state of the Media Gateway from inService to outOfService or from outOfService to inService. The resulting service state of the gateway is represented by mgAdministrativeState. If set, this parameter triggers the following:

  • inService: transition mgAdministrativeState to inService. In the course, the MG's MGCs may get notified of this transition, e.g. in the case of MGCP through emission of RSIPs to registered call agents according to policy.

  • forcefulOutOfService: Take the gateway out-of-service forcefully. This releases any resources at the Media Gateway. In the course, the MGCs may get notified of this transition, e.g. in the case of MGCP through emission of RSIPs to registered call agents according to policy.

  • gracefulOutOfService: Take the gateway out-of-service gracefully. If there are no resources existing, mgAdministrative transitions to outOfService immediately. If resources exist, mgAdministrativeState transitions to pendingOutOfService thus initiating a graceful shutdown.In the course, the MG's MGCs may get notified of this transition, e.g. in the case of MGCP through emission of RSIPs to registered call agents according to policy.

Shutdown Grace Time

The time in seconds after which an MG will transition from shuttingDown to locked. A value of -1 indicates that the MG allows for draining, i.e. will automatically transition after the last resources in use have been released. Otherwise, it essentially indicates the amount of time an MGC has to perform any cleanup, e.g deletion of connections etc.

Maximum Number of MGC's

The maximum number of MGCs that the MG can be configured with. In other words, the maximum number of entries that mgcTable can have. If 0, there is no limitation.

Supported Protocols

The Supported Protocols table identifies the protocols and revisions a media gateway supports.


Figure 12-14: Supported Protocols Table


The parameters are described in Table 12-14.


Table 12-14: Supported Protocol Table Parameters 
Parameter

Description

 Media Gateway Protocol


 A control protocol and its revision supported by the call gateway for example, "MGCP 0.1 11/9/99"


 The protocol can be one of the control protocols like MGCP or it can be a signalling backhaul protocol or it can be resource co-ordination protocol like SRCP.


 Protocol Number


 Serves as index to this table.

Call Agents

The following dialogs pertain to the media gateway controllers (Call Agents) and the media gateway's association with them.

Media Gateway Controllers

Use the Media Gateway Controllers table to specify Call Agents.


Figure 12-15: Media Gateway Controllers Table


The parameters are described in Table 12-15.


Table 12-15: Media Gateway Controllers Table Parameters
Parameter Description

Controller Domain Name

Denotes the name of the media gateway controller. This corresponds to a domain name under which the MGC could also be registered in a DNS.

Note   Once the row has become active, this value may not be modified.

Number

Serves as an index to this table.

Association State

Represents the state of the association between the Media Gateway and the Media Gateway Controller. The possible values are

  • mgcUnassociated: MG and MGC are not associated. E.g. in the case where MGCP is the coordination protocol, it means no subscription to autonomous messages such as RSIP but control requests would be answered.

  • mgcAssociated: MG and MGC are associated. E.g. in the case where MGC is the coordination protocol, it means MGC is subscribed to autonomous messages such as RSIP.

  • mgcAssociatedCommLoss: Associated but MGC unreachable.

Association State Control

Used to control the association state, as represented by mgcAssociationState. The possible value for a set operation on this parameter are

  • mgcUnassociate: Transition from any state to unassociated.

If registered, MG will initiate unregistration.

  • mgcAssociate: Transition to associated. If applicable, MG will register with MGC. If MGCP is the coordination protocol, MG will send RSIP.

If MG cannot establish communication, it will subsequently transition into mgcAssociatedCommLoss.

If MG is already associated with MGC, no transition will take place and mgcAssociationState shall not change.

mgcClear: No action will be taken. This means that the Media Gateway will not initiate any association/unassociation.

mgcRowStatus

Controls the creation and deletion of a table entry. An entry may be created using the "createAndGo" option. When the row is successfully created, the RowStatus would be set to "active" by the agent. An entry may be deleted by setting the RowStatus to "destroy". Other options such as "CreateAndWait", "notInService", "notReady" will not be used.

For creating the row, a value for mgcName must be provided. To all other parameters, defaults defined by the agent implementation may apply.

Deletion of a row with mgcAssociationState other than unassociated shall be rejected.

Configured Protocols

Use the Configured Protocols table to specify relationships between the Media Gateway Control table and a supported protocol.


Figure 12-16: Configured Protocols Table


The parameters are described in Table 12-16.


Table 12-16: Configured Protocols Table Parameters 
Parameter

Description

 Add or Delete Protocols


 Controls the creation and deletion of a table entry. An entry may be created using the "createAndGo" option. When the row is successfully created, the RowStatus would be set to "active" by the agent. An entry may be deleted by setting the RowStatus to "destroy". Other options such as "CreateAndWait", "notInService", "notReady" will not be used.


 Modification of the row is not allowed.


 Number


 Serves as index to this table.


 Protocol Number


 Serves as index to this table.

Internal Name Resolution

Use the Internal Name Resolution table to specify the name to IP address mapping for each of the MGCs. This mapping can be used where a DNS is not applied. Several addresses may be associated with a single name.


Figure 12-17: Internal Name Resolution Table


The parameters are described in Table 12-17.


Table 12-17: Internal Name Resolution Table Parameters
Parameter Description

Domain Name

Denotes the name of the media gateway controller. This corresponds to a domain name under which the MGC could also be registered in a DNS. Once the row has become active, this value may not be modified.

Index

Serves as index to this table.

IP Address

Denotes the IP Address of the entity. Once the row has become active, this value may not be changed. To change the IP address, an entry will have to be removed and a new entry will have to be added.

Comm State

Indicates whether the address is the one currently applied for communications with the system of that name.

  • csActive - name resolves to that IP address

  • csInactive - IP address currently not in use.

On creation of the row, this value will be csInactive, although it may transition immediately afterwords to active, triggering the applicable trap.

Preference

Allows to optionally configure primaries and secondaries. Can be used by the MG in the selection of an IP address if multiple IP addresses are available for the same name.

Row Status

Controls the creation and deletion of a table entry.

An entry may be created using the "createAndGo" option. When the row is successfully created, the RowStatus would be set to "active" by the agent thereby creating an endpoint. An endpoint may be deleted by setting the RowStatus to "destroy". Other options such as `CreateAndWait', "notInService", "notReady" will not be used.

On creation of the row, values for mgcResolutionName, mgcResoltuionIpAddress, and mgcResoltuionPreference need to be supplied.

CAS Management

The following dialogs are used to configure the CAS backhaul feature on VISM.

CAS Parameters

The following are CAS general management parameters.


Figure 12-18: CAS Parameters Table


The parameters are described in Table 12-18.


Table 12-18: CAS Parameters Table Parameters
Parameter Description

vismCasVariant
Name

A string identifier for the CAS variant. It is used as index to the table. The maximum length allowed is 64 bytes.

vismCasFileName

The file which contains the signal definition and the Finite State Machine definition for the CAS variant. The name is supplied during the creation of the table entry.

Modifying the value of this parameter is not allowed.

Upon the creation of the table entry, the file will be downloaded from a tftp server configured in the vismTftpServerDn parameter and the CAS finite state machine will be initialized based on the information contained in this file.

This parameter is required to create en entry in this table.

vismCasTRinging

The ringing time in seconds for the Cas Variant. Ringing remains on until this timer expires or until an off hook is received.

vismCasDigit
Method

The default digit method to be used for digit collection. If the digit method can not be derived from the digit map specified by the call agent in the XGCP message, this digit method will be used.

vismCasInterdigit
Tpart

The partial dial timing in seconds and is used along with a digit map as the inter-digit timer. The timer is not started until the first digit is entered, and the timer is restarted after each new digit is entered until either a digit map match or mismatch occurs.

vismCasInterdigit
Tcrit

The critical timing in seconds. If used along with a digit map, the timer is started when the last digit is received. i.e and when no more digits are required for a digit map match. After this timer expires, the digit map match is assumed to be complete. If used without a digit map, the timer is started immediately and cancelled (but not restarted) as soon as a digit is entered.

vismCasInterdigit
TMF

The interdigit timeout value for MF digits. The timeout value is in seconds.

CAS BackHaul Management

The following parameters are specific to the CAS BackHaul feature.


Figure 12-19: CAS BackHaul Management Table


The parameters are described in Table 12-19.


Table 12-19: CAS BackHaul Management Table Parameters
Parameter Description

vismCasXgcpVariantName

A string identifier for the CAS variant. It is used as index to the table.

vismCasXgcpFile
Name

The file which contains the signal definition and the Finite State Machine definition for the CAS variant.

vismCasXgcpMax
ReXmitTime

The maximum timeout value in milliseconds, used for retransmitting unacknowledged XGCP messages at the Call Agent - CAS/PBX interface. The value can be set in 10 ms increments.

vismCasXgcpInitial
ReXmitTime

The initial timeout value in milliseconds, used for retransmitting unacknowledged XGCP messages at the Call Agent - CAS/PBX interface. The increments for this value are 10 ms.

vismCasXgcpMax
Retries

The number of retries for a message that exceeds vismCasXgcpMaxReXmitTime or vismCasXgcpInitialReXmitTime.

Supported Codec Templates

Use the Supported Codec Templates table dialog to define the DSP templates that are applicable on a card basis. A table defines the set of codecs supported in each template and the maximum number of DS0s supported on the VISM card for a given template (See Figure 12-20.)


Figure 12-20: Supported Codec Templates Table


The parameters are described in Table 12-20.


Table 12-20: Supported Codec Templates Table Parameters
Parameter Description

vismCodecCnfIndex

An index to this table.

  • 1—G.711u

  • 2—G.711a

  • 3—G.726-32K

  • 4—G.729a

  • 5 —G.729ab

  • 6—clear channel

vismCodecName

The name of the codec for example index 1 will have G.711u as the codec name index 2 will have G.711a as the codec name.

vismCodecPktPeriod

The packetization period for a particular codec in milliseconds.

  • for G.711a allowed values are 10 & 20

  • for G.711u allowed values are 10 & 20

  • for G.726-32K allowed values are 10, 20 30 & 40

  • for G.729a allowed values are 10, 20, 30 & 40

  • for G.729ab allowed values are 10, 20, 30 & 40

  • for clear channel allowed values are 10 and 20

Card/Endpoints (VISM)

Use the Card/Endpoints table dialog to create and configure new endpoints (Table 12-21.)


Figure 12-21: Card/Endpoints (VISM) Dialog


The parameters are described in Table 12-20.


Table 12-21: Card/Endpoints (VISM) Dialog Parameters
Parameter Description

Line

Identifies the line. This should be at the level of a DS1 (due to restrictions to the number of channels that can be represented in a bit map). Generally, this will correspond to the ifIndex of the physical interface terminating the line. Where the line is physically not a DS1 but higher (e.g. DS3), an algorithm shall be applied that logically partitions the line into virtual DS1s which are identified by this parameter. Once the row has become active, this value may not be changed.

Endpoint

Identifies endpoint as it is known by the NE. The EndpointNumber is unique for the entire Media Gateway and ranges from 1 to the maximum number of endpoints that the media gateway can support.

Name

Identifies endpoint as it is known by the MGC. If MG and MGC use a mutually agreed upon convention, this may be supplied by the agent, i.e. be read-only.

Speed

Indicates the endpoint's bandwidth, in Kbps. Typically, this will be 64 times the number of channels terminated by the endpoint.

State

Indicates the state of the endpoint.

  • active—the endpoint is in service and operational.

  • failed—the endpoint is in service but not operational, e.g. because a line that the endpoint belongs to is in a state of service affecting alarm.

  • degraded—the endpoint is in service but not fully operational, e.g. in cases with endpoints with channels on multiple lines, when one of the lines is in a state of service affecting alarm.

If MGCP is used as the control protocol, the following transitions will generally trigger an RSIP command:

  • from active/degraded to failed

  • from failed to degraded/active

Transitions between active and degraded will generally not trigger emission of RSIP.

ChannelMap

Bit map of DS0s used by the endpoint. Bit positions set to '1' represent DS0s used by the endpoint. The position corresponds to the DS0 number.

MGs may have restrictions regarding the creation of endpoints (e.g. only one channel, only consecutive channels, only channels of one line). Once the row has become active, this value may not be changed.

Row Status

Controls the creation and deletion of a table entry.

An entry may be created using the 'createAndGo' option. When the row is successfully created, the RowStatus would be set to 'active' by the agent thereby creating an endpoint. An endpoint may be deleted by setting the RowStatus to 'destroy'. Other options such as `CreateAndWait', 'notInService', 'notReady' will not be used.

On creation, values for mgEndpointLineNumber and mgEndpointChannelMap have to be supplied.

Displaying and Configuring Lines

There are four ways to select the line (using either a front or rear view of the card) to display the appropriate line configuration dialog:

To display the configuration parameters for a particular line/port, select the name of the category from the Category popup menu at the top of the dialog. The categories of line configuration available are:

Physical Line Config (dsx1)

Use the Physical Line Configuration dialog to view and configure dsx1 physical line configuration information. (See Figure 12-22.)


Figure 12-22: Physical Line Config (dsx1) Dialog


The parameters are described in Table 12-22.


Table 12-22: Physical Line Config (dsx1) Dialog Parameters
Parameter Description

Line Num

Line number.

Type

Line type Choose one from the popup menu:

  • dsx3CbitParity

  • g832-g804

  • dsx3M23

  • g751

  • dsx3Unframed

  • e3Unframed

Connector

Line coding. Can be dsx3B3ZS or e3HDB3.

Line Enable

Choose enable or disable.

Coding

Line length. Choose lessThan225 or moreThan225 from the popup menu.

Length

Line OOF decision criteria. Can be fBits30f8 or fBits3Of16.

Xmt Clock

Choose checkCbits or ignorebits from the popup menu.

If checkCbits, AIS is declared when 1010 pattern is found and C-Bits are all zero. If ignorebits, an AIS condition is declared when the AIS pattern 1010 is detected, regardless of the state of the C-Bits.

Loopback

Loopback configuration of the DS3/E3 interface. Choose one from the popup menu:

  • dsx3NoLoop

  • dsx3RemoteLineLoop

  • dsx3LocalLineLoop

  • dsx3InbndLocalLoopback

Code Sent

Far-end alarm and control (FEAC) code validation criteria.

Choose fFEACCodes4Of5 or fFEACCodes8Of10 from the popup menu.

If FEACCodes4Of5 is specified, a valid FEAC codes is declared if four of five codes match. If fFEACCodes8Of10 is specified, a valid FEAC code is declared when eight of ten codes match.

DS0's Used

Indicates the bit-oriented code to transmit over the far-end alarm and control (FEAC) channel. Choose one from the popup menu:

  • dsx3SendNoCode

  • dsx3SendLineCode

  • dsx3SendLineCode

  • dsx3SendPayLoadCode

  • dsx3SendResetCode

  • dsx3SendDS1LoopCode

  • dsx3SendSendTestPattern

Loopback code Detect

Line transmit clock source. Choose one from the popup menu:

  • backplaneClk

  • recoverClk

  • localClk

Enable BERT

Bitmap of the dsx3 FarEnd line loopback status bits.

To modify the parameters, make the changes you want and click Modify.

Line Config (VISM)

Use the following parameters to configure lines, line alarms, and realtime counters.


Figure 12-23: Line Config (VISM) Dialog



Table 12-23: Line Config (VISM) Dialog Parameters 
Parameter

Description

 Line


 The line number. This should be at the level of a DS1 (due to restrictions to the number of channels that can be represented in a bit map). Generally, this will correspond to the ifIndex of the physical interface terminating the line. Where the line is physically not a DS1 but higher (e.g. DS3), an algorithm shall be applied that logically partitions the line into virtual DS1s which are identified by this parameter. 


 Enable


 Echo cancellation feature is enabled or disabled.


 Ecan Tone Disable


 Echo Canceller Disable on Modem Tone. This parameter determines the behavior of the echo canceller in the presence of a modem.


  • 1—Ignore 2100 Hz modem answer tone;
    

  • 2—G.164 mode
    



  Disables the canceller for all the tones, phase reversing or not.




  • 3—Reserved; 
    



  SETting the value to reserve(3) results in BadValue error.




  • 4—G.165 mode
    



  Disables the canceller for Phase reversing tone only.


  (V.8 modulated phase reversing tone as well as the V.fast non- standard phase reversing tone)




 Ecan Re-enable


 Echo Canceller Re-enable (NRN). This parameter determines when an echo canceller re-enables and begins cancellation after it has been disabled due to detection of a modem answer tone.


  • 1—Re-enable canceller when modem data gone (low energy)
    

  • 2—Re-enable at end of call
    



 This parameter is not applicable when ToneDisable=Ignore.


 MaxTail (ms)


 Maximum TAIL in milliseconds (ms).


 Should be set just higher than the worst round trip delay anticipated. Convergence times may increase for longer tails and more resource will be used. Only following discrete values are allowed.


  • 24
    

  • 32
    

  • 48
    

  • 64
    

  • 80
    

  • 96
    

  • 112
    

  • 128
    



 The default value is 32.


 Residual Echo Control


 Residual Echo Control (REC) instructs the canceller how to treat echo remaining after cancellation. When set to cancelOnly, REC is disabled.


 When set to suppressResidual, the residual echo is replaced with silence.


 When comfortNoise is chosen, noise is injected in place of residual echo at the same level as the ambient noise at the near end.







Note   SETting the value to reserved(3) results in BadValue error.




 


 VAD Compres


 VAD (Voice Activity Detection) Enable or Disable on the Compression DSPs.


 The default value is Enable.


 vismSignalingType


 The type of signaling used for the line.


  • CAS—Channel Associated Signaling
    

  • CCS—Common Channel Signaling
    

  • none—no signaling used.
    








Note   This cannot be modified if endpoints are present and /or if cids/ccs channels are associated with this line in aal2Trunking mode.









Note   The CAS signaling type is not allowed if any of the DS0's on this line have loop back set to RemoteLoop or if any of the DS0's has InsertLocalCas enabled.




 


 vismCcsChannels


 Describes the CCS signaling channels or DS0s (also referred to as D-channel). It is used only for lines configured as CCS signaling type. It is a bit map of the DS0s configured as D channel. A one in the bit position represents that DS0 as the D channel. In most of the applications, only one D channel per T or E span is required. However, since some applications may require multiple D channels, this is supported by providing a bit map. This parameter is set by 'addccs' CLI command.

VISM ds0's

Use the VISM ds0's dialog parameters to configure the DS0s on T1/E1 lines of VISM.


Figure 12-24: VISM ds0's Table


The parameters are described in Table 12-22.


Table 12-24: VISM ds0's Table Parameters 
Parameter

Description

 ds0IfIndex


 Defines the index for this table. The index value is derived from the formula, index = 31 (DS1# - 1) + DS0# where: 


  • DS1#—The T1/E1 line number ranges from 1 - 8.
    

  • DS0#—The DS0 channel number ranges for T1, from 1 to 24, and for E1, from 1 to 31.
    



 ds0RobbedBitSignalling


 Turns on/off Robbed Bit Signalling for a given DS0. This only applies to DS0s on a DS1 link. 


 For E1 links, the value is always off (false). 


 For T1 links, the default value is true if the line is configured for CAS signaling, the default value is false if the line is configured for CCS signaling or no signaling.


 ds-IdleCode


 The code transmitted in the ABCD bits when the DS0 is not connected and ds0TransmitCodesEnable is enabled. The parameter is a bitmap and the various bit positions are


  • Bit 0 (value 1)     D bit
    

  • Bit 1 (value 2)     C bit
    

  • Bit 2 (value 4)     B bit
    

  • Bit 3 (value 8)     A bit
    



 This parameter is useful for DS0 conditioning to be done if an alarm condition is detected from the network side. DS0 conditioning is implemented in the trunking application only.







Note   This parameter is not applicable in the CAS backhaulapplication.




 The default value is 0.


 ds0SeizedCode


 The code transmitted in the ABCD bits when the DS0 is connected and ds0TransmitCodesEnable is enabled. The parameter is a bitmap and the various bit positions are


  • Bit 0 (value 1)     D bit
    

  • Bit 1 (value 2)     C bit
    

  • Bit 2 (value 4)     B bit
    

  • Bit 3 (value 8)     A bit
    



 This parameter is useful for DS0 conditioning to be done if an alarm condition is detected from the network side. DS0 conditioning is implemented in the trunking application only.







Note   This parameter is not applicable in the CAS backhaul application.




 The default value is 15.


 ds0ReceivedCode


 The code received in the ABCD bits. The parameter is a bitmap and the various bit positions are


  • Bit 0 (value 1)    D bit
    

  • Bit 1 (value 2)    C bit
    

  • Bit 2 (value 4)    B bit
    

  • Bit 3 (value 8)    A bit
    



 ds0BundleMapped


 The endpoint number as specified by mgEndpointNumber of endpoint table. If it is not associated with any endpoint, then it is set to -1.







Note   The endpoint is associated with bearer DS0s only. For signaling channel or DS0 as in the case of CCS channel, there is no endpoint number associated with it and the value is set to -1.




 


 ds0IfType


 The interface type associated with the DS0. 


 ds0 ifType is considered as bearer if the DS0 is used for carrying voice traffic.


 ds0 ifType is considered as ccs-signaling, if the DS0 is configured as the D-channel 


 ds0CasVariantName


 The index to the CAS variant table. This parameter can be configured after configuring this DS0 as an endpoint. This parameter cannot be modified while connections exist on this endpoint. The CAS variant table is used for configuring the system parameters associated with various types of CAS signaling methods supported on VISM.


 ds0CasCadenceOnTime


 This parameter describes the duration of digit tone generation. The value is expressed in units of milliseconds.







Note   This parameter is applicable only for CAS backhaul applications. Not for trunking applications. 




 The default value is 75.


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Posted: Fri Sep 29 13:10:06 PDT 2000
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