Cisco IOS Software Configuration for the 1-Port Channelized OC-12/STM-4 (DS3) Line Card
How to Configure the 1-Port Channelized OC-12/STM-4 (DS3) Line Card
You can connect the local (near-end) DS3 port to the remote (far-end) DS3 port using a third-party DSU. Then use the telnet command from the local DS3 port to communicate with the remote DS3 port to verify the DSU mode settings. If necessary, change the DSU mode settings on the local DS3 port to match the DSU mode settings on the remote DS3 port. When the local and remote DS3 ports are configured with matching DSU mode settings, you can start passing data traffic between the near end and the far end of the network.
If the telnet command does not allow the local DS3 port to communicate with the remote DS3 port, it indicates that the DSU mode settings on the local and remote DS3 ports do not match. You can establish direct communication by removing the third-party DSU between the local and remote DS3 ports, and using the default DSU mode, Cisco. When you establish a direct connection between the local and remote DS3 ports, you can use Cisco IOS software commands that are specific to the Cisco Remote Connection Management feature to verify the DSU mode settings on the remote DS3 port. (See Table 1.) After the local and remote DS3 configuration settings match and you verify network connectivity, you can reinsert a third-party DSU into the configuration.
The Cisco Remote Connection Management feature is Cisco proprietary. It works only with the channelized 1-port channelized OC-12/STM-4 (DS3) line card and the 6-port or 12-port DS3 line cards in the Cisco 12000 Series Router.
Table 3 shows the default DS3 channel configuration of an enabled 1-port channelized OC-12/STM-4 (DS3) line card. In serial interface channel configuration mode, select an OC-12 controller for configuration using the interface serial slot/port:channel command.
Table 3 | 1-Port Channelized OC-12/STM-4 (DS3) Line Card DS3 Channel Configuration Default |
| Values | | |
| | | |
Parameter | | Configuration Command | Default Value |
| | |
DS3 channel, framing mode | [no] framing [c-bit m13] | c-bit |
| | |
DS3 channel, DSU mode | [no] dsu mode | cisco |
| | [cisco digital-link kentrox larscom] | |
| | |
DS3 channel, DSU subrate | [no] dsu bandwidth Kilobits/sec | 44210 |
bandwidth | | | |
| | |
DS3 channel, remote requests | [no] dsu remote accept | accept |
| | |
DS3 channel, far-end DSU | [no] dsu remote fullrate | user-configured value |
bandwidth | | | |
| | |
DS3 channel, payload | [no] scramble | no scramble |
scrambling | | | |
| | |
DS3 channel, loopback mode | [no] loopback | no loopback |
| | [local network remote] | |
| | |
DS3 channel, BER testing | [no] bert pattern | no bert |
| | [2^15 2^20 2^23 0s 1s ] interval | |
| | [1-1440] | |
| | | |
Note You can use Cisco Remote Connection Management only if (1) both ends of the DS3 line are configured for C-bit parity mode, and (2) the FEAC message from the DS3 payload source terminal to the DS3 payload sink terminal is delivered unaltered.
Cisco IOS Release 12.0(8)S
