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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
6
Cisco IOS Release 12.0(8)S
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.
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.
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 | digital-link | kentrox | larscom]
cisco
DS3 channel, DSU subrate
bandwidth
[no] dsu bandwidth Kilobits/sec 44210
DS3 channel, remote requests [no] dsu remote accept accept
DS3 channel, far-end DSU
bandwidth
[no] dsu remote fullrate user-configured value
DS3 channel, payload
scrambling
[no] scramble no scramble
DS3 channel, loopback mode [no] loopback
[local | network | remote]
no loopback
DS3 channel, BER testing [no] bert pattern
[2^15 | 2^20 | 2^23 | 0s | 1s ] interval
[1-1440]
no bert