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The Cisco AS5800 universal access server is equipped with double-density modem module cards (DMMs) for converting analog pulse-code modulation (PCM) bitstreams to digital data.
This chapter explains how to remove and replace the double-density modem card in the Cisco 5814 dial shelf. It also includes steps for configuring your software and verifying and troubleshooting your DMM installation.
The Cisco AS5800 accommodates a maximum of ten DMM cards. Each DMM card plugs directly into the dial shelf backplane and has no external connections. Each DMM card has five LEDs, which indicate modem card status.
The Cisco AS5800 is capable of terminating as many as 1,344 modem connections when equipped with ten DMM cards and two CT3 trunk cards.
Each double-density modem card contains 12 DMM SIMMS. Each DMM SIMM contains 12 digital modems.
Figure 4-1 shows the double-density modem card components.
The double-density modem card performs the following functions:
DMM cards can be installed in slots numbered 0 to 11 on the dial shelf backplane. However, we recommend that you install modem cards in dial shelf slots 2 to 11 and reserve slots 0 and 1 for trunk cards. (Trunk cards are required for call termination and can only operate in slots 0 to 5.)
Figure 4-2 shows a fully configured Cisco 5814 dial shelf with ten modem cards installed.
The DMM card has five LEDs to indicate modem card status. See Figure 4-3.
During normal operation, all five LEDs light when the system is powered ON and the DMM cards are ready. When the modem card CPU software image starts running, it shuts off all LEDs except the power LED. DMM card LEDs are listed in Table 4-1.
| LED | Color | Description |
|---|---|---|
PWR (Power) | Green | Lights when card is powered ON. |
Maint (Maintenance) | Yellow | Lights when there are no active calls on the card and you have completed a card-level software busyout. This indicates that the card is ready to be removed. |
HCPU (Host CPU) | Green | Lights when the DMM card passes diagnostics and the modem card CPU is operating properly. |
Modems | Green | Lights when all modem modules have passed diagnostics and are operating properly. Remains OFF if one or more modem modules are absent from the card or if one or more modems fails diagnostics. |
Calls | Green | Lights when at least one active call is switched through the modem card. |
Modem card software is automatically downloaded to a modem card from the router shelf when you boot the system for the first time or when you insert a modem card while the system is operating. If you insert modem cards while the system is operating, the system software recognizes the cards and the router shelf downloads the required portware to the cards.
The modem firmware image (also known as portware) is bundled with the Cisco IOS modem card image. The firmware image uses an auto-detect mechanism, which enables the modem to service multiple modem call types. A modem detects the call type and automatically configures itself for that operation.
The DMM modems can be programmed to collect ANI (calling number) and DNIS (called number) digits for caller identification information when the trunk cards are configured in channel-associated signaling (CAS) mode. The modem passes the ANI/DNIS information to the DMM card software using a portware mailbox message.
The DMM cards support the modem standards and features listed in Table 4-2.
| Feature | Description |
|---|---|
Carrier protocols | ITU V.23 at 75/1,200 bps Telcordia Technologies (formerly Bellcore) 103 at 300 bps ITU V.21 at 300 bps ITU V.22 at 1,200 bps Telcordia Technologies (formerly Bellcore) 212A at 1,200 bps ITU V.22bis at 2,400 bps ITU V.32 up to 9,600 bps ITU V.32bis up to 14,400 bps V.32 turbo up to 19,200 bps V.FC up to 28,800 bps V.34 up to 28,800 bps V.34+ up to 33,600 bps TIA/ITU 56K up to 56,000 bps (when standardized) K56flex |
Error-correcting link-access protocols | V.42 LAPM, MNP 2-4 |
Compression protocols | V.42bis (includes MNP 5) |
Command interface | Superset of the AT command set |
In-band signaling/tone generation and detection | DTMF generation DTMF detection MF generation MF detection |
Other | Out-of-band access for management PPP and SLIP framing |
During normal operation, all five DMM card LEDs light when the modem card is powered ON. When the modem card CPU software starts running, it shuts off all LEDs except the power LED. The LEDs then light again as described in Table 4-1.
To complete the installation, verify that the DMM card LEDs operate properly by observing the following LED states:
For further installation troubleshooting information, refer to the Cisco AS5800 Universal Access Server Hardware Installation Guide.
The Cisco 5814 dial shelf is designed to recognize modem cards in slots 0 to 11 within the dial shelf chassis. If you are installing ten modem cards in the dial shelf chassis, we recommend that you install modem cards in slots 2 to 11 and reserve slots 0 and 1 for trunk cards.
If you are replacing a dial shelf card by installing a new dial shelf card of the same type in the same slot, the system software recognizes the new dial shelf card interfaces and brings them up automatically. No additional configuration is needed.
Table 4-3 lists commands to help you configure your double-density modem card.
| Step | Command | Description | ||
|---|---|---|---|---|
|
| Enter the enable command. Enter your password. You are in privileged EXEC mode when the prompt changes to | ||
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| Enter global configuration mode by typing the configure command. The example uses the terminal configuration option. You are in global configuration mode when the prompt changes to | ||
|
| Specify the country to set the modem parameters (including country code and encoding) for MICA modems. The default is usa if the access server is configured with T1 interfaces and e1-default if the access server is configured with E1 interfaces. | ||
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| Enter the number of modem lines to configure. If you have 144 modems on a modem card in slot 2 of a dial shelf identified as shelf 2, enter 2/2/0 2/2/143. Note: Each DMM card contains 12 DMM SIMMs. Each DMM SIMM has 12 digital modems. | ||
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| Allow all protocols to be used when connecting to the line. | ||
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| Enable remote IP users running a PPP application to dial in, bypass the EXEC facility, and connect directly to the network. | ||
|
| Enable incoming and outgoing calls. | ||
|
[or]
| Type the exit command to exit out of line configuration mode.
Press the Return key to verify your command registers, then type Ctrl-Z to return to privileged EXEC mode. | ||
| AS5800-1# copy running-config startup-config | Save your changes when ready. |
If you are installing a new modem card into the dial shelf, additional configuration is needed. For additional software configuration information, refer to the Cisco AS5800 Universal Access Server Software Installation and Configuration Guide that shipped with your system. (The Cisco AS5800 Universal Access Server Software Installation and Configuration Guide will be replaced by the Cisco AS5800 Universal Access Server Operation, Administration, Maintenance, and Provisioning Guide, available later this year.)
Table 4-4 lists commands to help you configure your double-density modem lines.
| Step | Command | Description | ||
|---|---|---|---|---|
|
| Enter the enable command. Enter your password. You are in privileged EXEC mode when the prompt changes to | ||
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| Enter global configuration mode by typing the configure command. The example uses the terminal configuration option. You are in global configuration mode when the prompt changes to | ||
| AS5800-1(config)# line shelf/slot/port | Configure lines shelf/slot/1 shelf/slot/xx. You are in line configuration mode when the prompt changes to | ||
| AS5800-1(config-line)# modem inout | Enable incoming and outgoing calls. | ||
| AS5800-1(config-line)# modem autoconfigure type modem-name mica_hdms | Configure the line to attempt to configure the attached modem and select a modem type. | ||
| AS5800-1(config-line)# transport input all | Configure the transport input to select all protocols. | ||
| AS5800-1(config-line)# stopbits 1 | Configure stop bits. | ||
| AS5800-1(config-line)# flowcontrol hardware {in | out} | Set hardware flow control and direction. | ||
| AS5800-1(config-line)# login local | Enable password checking at login. The example uses local authentication based on user name. | ||
| AS5800-1(config-line)# autoselect during-login | Configure a line to start a session. | ||
| AS5800-1(config-line)# autoselect ppp | Configure PPP. | ||
| AS5800-1(config-line)# exit AS5800-1(config)#
[or]
| Type the exit command to exit out of line configuration mode
Press the Return key to verify your command registers, then type Ctrl-Z to return to privileged EXEC mode. | ||
| AS5800-1# copy running-config startup-config | Save your changes when ready. |
Posted: Thu Jun 22 16:34:40 PDT 2000
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