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This Cisco IOS feature allows V.110 calls to be originated and terminated over ISDN. The V.110 recommendation of the ITU-T rate adapts a low speed connection to an ISDN-B channel allowing the remote station or terminal adaptor to use the fast call set-up times offered by ISDN. This feature enables GSM wireless connectivity.
This MICA V.110 implementation supports other connect standards (V.34, V.90, and so forth) in addition to V.110. Modems are not dedicated to V.110 only and are allocated dynamically.
This document describes the Cisco IOS commands and AT commands required to support V.110 on MICA modems for AS5X00 Access Servers.
This V.110 implementation for calls on MICA modems are managed by special modem code, with the appropriate Cisco IOS image, similarly to other modulation standards. For pointers to information on modem code, see "Related Documents."
For pointers to information on hardware aspects of the Cisco AS5800, see "Related Documents."
For related terms used in this document, see the Glossary at the end of this document.
The following features are supported:
Basic V.110 is a digital link access protocol for Cisco access servers. Basic V.110 operates over an ISDN B channel. V.110 enables Cisco access servers to connect to ISDN terminal adapters requiring V.110 compatibility. This feature enables GSM wireless connectivity.
This ISDN feature is in addition to the existing analog capability of the MICA modems.
Also, some digital cellular networks support data applications via V.110 connecting from the cell phone. These networks place these V.110 calls on the PSTN for interconnecting to the ISP of the end-customer's choice.
The outputs of Cisco IOS show commands have been changed to display additional fields reflecting the V.110 capability.
An added AT command, ATDI, allows the user to command a V.110 modem to originate a V.110 call.
For more information, see the "Command Reference" section.
This basic feature allows a V.110 call to be originated and terminated. Synchronous V.110 is not supported. In addition, V.110 calls must terminate on a TTY asynchronous IOS interface.
Separate counters for analog and digital calls are not currently supported.
The following V.110 bearer rates and intermediate rates (ITU-T Recommendation Q.931) are supported:
This feature requires special modem code to be downloaded to the MICA Modems. See the modem code information in "Related Documents."
The current Modem Management MIB objects for MICA modems are used for V.110. One minor change is in the SNMP agent code. This change returns the correct modulation type for V.110 when it does a look up of the modulation for MICA modems.
Access Servers and Routers
http://www.cisco.com/univercd/cc/td/doc/product/access/index.htm
http://www.cisco.com/univercd/cc/td/doc/product/access/fwpwinfo/index.htm
There are no configuration tasks. All commands in this feature are existing show modem commands with modified display output.
No new IOS commands are added to support V.110 on MICA. This section documents existing show modem commands with modified outputs. For more information, see the documentation for the existing show modem commands. CCO links are provided in this section.
All other related commands used with this feature are documented in the Cisco IOS Release 12.0 command references and the Cisco AS5800 online new feature documentation.
The affected commands and their CCO links are listed in the following logical order:
For other and related modem management commands, such as modem-at mode, see the following CCO page:
The output of the show modem command includes outputs for the show modem configuration command and the show modem connect-speeds command.
Fields that have been added or changed for this command are:
Modem Type V.110 Protocol: ISDN Mode Connection Speeds 34000
The show modem command example is as follows:
router# show modem 1/0
Mdm Typ Status Tx/Rx G Duration RTS CTS DCD DTR
1/0 V.110 Conn 9600/9600 0 10:12:19 x x x x
Modem 1/0, Mica Hex Modem (Managed), Async1, TTY1
Firmware Rev: 2.7.1.0
Modem config: Incoming and Outgoing
Protocol: ISDN Mode, Compression: None
Management config: Status polling
RX signals: 0 dBm
Last clearing of "show modem" counters never
23 incoming completes, 2 incoming failures
0 outgoing completes, 0 outgoing failures
0 failed dial attempts, 0 ring no answers, 2 busied outs
0 no dial tones, 0 dial timeouts, 0 watchdog timeouts
0 no carriers, 0 link failures, 0 resets, 0 recover oob
0 recover modem, 0 current fail count
0 protocol timeouts, 0 protocol errors, 0 lost events
0 ready poll timeouts
Transmit Speed Counters:
Connection Speeds 75 300 600 1200 2400 4800
# of connections 0 0 0 0 0 1
Connection Speeds 7200 9600 12000 14400 16800 19200
# of connections 1 4 0 3 0 8
Connection Speeds 21600 24000 26400 28000 28800 29333
# of connections 0 0 0 0 0 0
Connection Speeds 30667 31200 32000 33333 33600 34000
# of connections 0 0 0 0 0 0
Connection Speeds 34667 36000 37333 38000 38400 38667
# of connections 0 0 0 0 6 0
Connection Speeds 40000 41333 42000 42667 44000 45333
Receive Speed Counters:
Connection Speeds 75 300 600 1200 2400 4800
# of connections 0 0 0 0 0 1
Connection Speeds 7200 9600 12000 14400 16800 19200
# of connections 1 4 0 3 0 8
Connection Speeds 21600 24000 26400 28000 28800 29333
# of connections 0 0 0 0 0 0
Connection Speeds 30667 31200 32000 33333 33600 34000
# of connections 0 0 0 0 0 0
Connection Speeds 34667 36000 37333 38000 38400 38667
# of connections 0 0 0 0 6 0
Connection Speeds 40000 41333 42000 42667 44000 45333
# of connections 0 0 0 0 0 0
Connection Speeds 46000 46667 48000 49333 50000 50667
# of connections 0 0 0 0 0 0
Connection Speeds 52000 53333 54000 54667 56000
# of connections 0 0 0 0 0
Fields that have been added or changed for this command are:
Parameter #1 Connect Protocol: ISDN Mode Parameter #8 Connected standard V.110 Parameter #41 V110 frames received bad: Parameter #42 V110 frames received good: Parameter #43 V110 frames transmitted: Parameter #44 V110 sync lost:
The show modem operational-status command example is as follows:
router# show modem operational-status 1/0
Modem(1/0) Operational-Status:
Parameter #0 Disconnect Reason Info: (0x0)
Type (=0 ): <unknown>
Class (=0 ): Other
Reason (=0 ): no disconnect has yet occurred
Parameter #1 Connect Protocol: ISDN Mode
Parameter #2 Compression: None
Parameter #3 EC Retransmission Count: 0
Parameter #4 Self Test Error Count: 0
Parameter #5 Call Timer: 37079 secs
Parameter #6 Total Retrains: 0
Parameter #7 Sq Value: 7
Parameter #8 Connected Standard: V.110
Parameter #9 TX,RX Bit Rate: 9600, 9600
Parameter #11 TX,RX Symbol Rate: 0, 0
Parameter #13 TX,RX Carrier Frequency: 0, 0
Parameter #15 TX,RX Trellis Coding: (n/a), (n/a)
Parameter #16 TX,RX Preemphasis Index: 0, 0
Parameter #17 TX,RX Constellation Shaping: (n/a), (n/a)
Parameter #18 TX,RX Nonlinear Encoding: (n/a), (n/a)
Parameter #19 TX,RX Precoding: (n/a), (n/a)
Parameter #20 TX,RX Xmit Level Reduction: 0, 0 dBm
Parameter #21 Signal Noise Ratio: 0 dB
Parameter #22 Receive Level: 0 dBm
Parameter #23 Frequency Offset: 0 Hz
Parameter #24 Phase Jitter Frequency: 0 Hz
Parameter #25 Phase Jitter Level: 0 degrees
Parameter #26 Far End Echo Level: 0 dBm
Parameter #27 Phase Roll: 0 degrees
Parameter #28 Round Trip Delay: 0 msecs
Parameter #30 Characters transmitted, received: 247, 308
Parameter #32 Characters received BAD: 0
Parameter #33 PPP/SLIP packets transmitted, received: 9, 9
Parameter #35 PPP/SLIP packets received (BAD/ABORTED): 0
Parameter #36 EC packets transmitted, received OK: 0, 0
Parameter #38 EC packets (Received BAD/ABORTED): 0
Parameter #39 Robbed Bit Signalling (RBS) pattern: 0
Parameter #40 Digital Pad: (n/a), Digital Pad Compensation: None
Parameter #41 V110 frames received bad: 0
Parameter #42 V110 frames received good: 7417301
Parameter #43 V110 frames transmitted: 7417310
Parameter #44 V110 sync lost: 0
Fields that have been added or changed for this command are:
Connect Protocol: ISDN Mode Connected Standard V.110 V110 frames received bad: V110 frames received good: V110 frames transmitted: V110 sync lost:
The show modem log command example is as follows:
router# show modem log 1/1
Modem 1/1 Events Log:
...
...
...
4d06h :Modem State event:
State: Train Up
4d06h :Modem State event:
State: EC Negotiating
4d06h :Modem State event:
State: Steady
4d06h :RS232 event: RTS, DTR, CTS, DCD
4d06h :Static event:
Connect Protocol: ISDN Mode
Compression: None
Connected Standard: V.110
TX,RX Symbol Rate: 0, 0
TX,RX Carrier Frequency: 0, 0
TX,RX Trellis Coding: (n/a), (n/a)
Frequency Offset: 0 Hz
Round Trip Delay: 2 msecs
TX,RX Bit Rate: 19200, 19200
Robbed Bit Signalling (RBS) pattern: 0
Digital Pad: (n/a), Digital Pad Compensation: None
4d06h :Dynamic event:
Sq Value: 7
Signal Noise Ratio: 0 dB
Receive Level: 0 dBm
Phase Jitter Frequency: 0 Hz
Phase Jitter Level: 0 degrees
Far End Echo Level: 0 dBm
Phase Roll: 0 degrees
Total Retrains: 0
EC Retransmission Count: 0
Characters transmitted, received: 0, 0
Characters received BAD: 0
PPP/SLIP packets transmitted, received: 0, 0
PPP/SLIP packets received (BAD/ABORTED): 0
EC packets transmitted, received OK: 0, 0
EC packets (Received BAD/ABORTED): 0
V110 frames received bad: 0
V110 frames received good: 51
V110 frames transmitted: 64
V110 sync lost: 0
...
...
...
1d11h :Modem State event:
State: Terminate
1d11h :RS232 event: RTS, DTR, CTS, noDCD
1d11h :Modem State event:
State: Idle
1d11h :End Connect event:
Call Timer: 87 secs
Disconnect Reason Info: (0xDF06)
Type (=6 ): Tx (host to line) data flushing - OK
Class (=31): Requested by host
Reason (=6 ): network indicated disconnect
Total Retrains: 0
EC Retransmission Count: 0
Characters transmitted, received: 308, 50042
Characters received BAD: 0
PPP/SLIP packets transmitted, received: 10, 43
PPP/SLIP packets received (BAD/ABORTED): 0
EC packets transmitted, received OK: 0, 0
EC packets (Received BAD/ABORTED): 0
V110 frames received bad: 3
V110 frames received good: 34493
V110 frames transmitted: 34710
V110 sync lost: 1
...
...
...
10:37:18:Static event:
Connect Protocol: ISDN Mode
Compression: None
Connected Standard: V.110
TX,RX Symbol Rate: 0, 0
TX,RX Carrier Frequency: 0, 0
TX,RX Trellis Coding: (n/a), (n/a)
Frequency Offset: 0 Hz
Round Trip Delay: 2 msecs
TX,RX Bit Rate: 9600, 9600
Robbed Bit Signalling (RBS) pattern: 0
Digital Pad: (n/a), Digital Pad Compensation: None
10:37:20:Dynamic event:
Sq Value: 7
Signal Noise Ratio: 0 dB
Receive Level: 0 dBm
Phase Jitter Frequency: 0 Hz
Phase Jitter Level: 0 degrees
Far End Echo Level: 0 dBm
Phase Roll: 0 degrees
Total Retrains: 0
EC Retransmission Count: 0
Characters transmitted, received: 0, 0
Characters received BAD: 0
PPP/SLIP packets transmitted, received: 0, 0
PPP/SLIP packets received (BAD/ABORTED): 0
EC packets transmitted, received OK: 0, 0
EC packets (Received BAD/ABORTED): 0
V110 frames received bad: 0
V110 frames received good: 26
V110 frames transmitted: 33
V110 sync lost: 0
...
...
...
1d06h :End Connect event:
Call Timer: 105 secs
Disconnect Reason Info: (0xDF06)
Type (=6 ): Tx (host to line) data flushing - OK
Class (=31): Requested by host
Reason (=6 ): network indicated disconnect
Total Retrains: 0
EC Retransmission Count: 0
Characters transmitted, received: 247, 307
Characters received BAD: 0
PPP/SLIP packets transmitted, received: 9, 9
PPP/SLIP packets received (BAD/ABORTED): 0
EC packets transmitted, received OK: 0, 0
EC packets (Received BAD/ABORTED): 0
V110 frames received bad: 3
V110 frames received good: 20758
V110 frames transmitted: 20995
V110 sync lost: 1
The calling user can manually communicate with a V.110 modem in order to originate a remote V.110 dialout from the called modem. The AT command set includes the ATDI command (place V.110 call) to allow a V.110 call to be originated from the called modem. After establishing a session with the called MICA modem, you can enter the ATDI command to dial-out a V.110 call from the modem.
By specifying a value 8 in S29, the user causes the remote modem to implicitly assume that a V.110 connection is to be established. This command indicates that an ISDN call is being requested, and when used with the S29=8 command, results in modem code issuing a ISDN_DIALSTRING (0x45) request to the host.
After entering the S29=8 command, you can enter the desired user rate if different from the default value of 9600 bps. This command takes the form: S57=speed. For example:
S57=19200
For supported rates, see "Restrictions."
There are no debug commands specific to this feature. You can use existing ISDN debug commands. Examples are given in this section.
router# debug isdn q931 router# debug modem csm router# term mon
router# debug isdn q931 router# debug csm router# term mon
Boardware | Software that runs on the CPUs of certain supporting cards |
CSM | Call Switching Module |
E1 | European equivalent of T1, 32 channels of 64KHz, 1 for framing, 1 for signaling |
GSM | Global System for Communications |
HMM | Hex Modem Module |
IOS | Internetworking Operating System |
ISDN | Integrated Services Digital Network |
LLC | Link Layer Control |
MICA | Modem ISDN Channel Aggregation |
MSM | Modem State Machine |
Portware | Software that runs on MICA digital modem module |
PRI | Primary Rate Interface |
Q.931 | ISDN User-Network Interface Layer 3 Specification for Basic Call Control |
T1 | North American Channelized TDM with 24 channels of 64Khz each, plus an 8Khz frame |
TA | Terminal Adapter |
TDM | Time Division Multiplexing |
V.110 | ITU-T Standard for support by ISDN of Data Terminal Equipment with V-Series Type Interfaces |
Posted: Mon Jul 26 17:30:51 PDT 1999
Copyright 1989-1999©Cisco Systems Inc.