AI2524 Router Card User’s Manual
Page 15-2 August 1997
2524UM
Set the Network Line Speed In interface configuration mode, co n fi gur e t he net wo r k l i ne speed for
a 4-wire 56/64-kbps CSU/DSU module:
service-module 56k clock rate
line-speed
You can use the following line speed settings: 2.4, 4.8, 9.6, 19.2, 38.4,
56, 64 kpbs, and an auto setting.
The 64-kbps line speed cannot be used with ba ck- to -b a ck digital data
service (DDS) lines. The subrate line speeds are determined by the ser-
vice provider
Only the 56-kbps line speed is available in switched mode. Switched
mode is the default on the 2-wire CSU/DSU and is enabled by the
service-module 56k network-type interface configuration
command on the 4-wire CSU/DSU.
The auto linespeed setting enables the CSU/DSU to decipher current
line speed from the sealing current running on the network. Becaus
back-to-back DDS lines do not have sealing current, use the auto set-
ting only when transmitting over telco DDS lines and using the line
clock as the clock source.
Do not use any form of this command to enable a network line speed
of 56 kbps, which is the default.
Warning: If the console line speed is changed and saved to NVRAM
and the router is reloaded, the router displays this mes-
sage Failed to change line0’ speed. The ne
line speed is stored in the start-up configuration but not in
the running configuration. In addition, changing the line
speed on the router prevents connections to t he co nso le in-
terface via the AI185DP (the line speed on the router and
the AI185 must be set to 9600 bps). The default consol
speed for the Cisco router is also set at 9600 bps.