Manual
1-, 2-, and 4-Port T1/E1 HWICs and 8-Port T1/E1 Network Module
How to Configure T1/E1 HWICs and Network Module
10
Cisco IOS Release 12.4(11)XW5, and 12.4(20)T
Step 12
channel group channel-group-number {timeslots
range [speed kbps] | unframed}
or
pri-group timeslots timeslot-range
or
tdm-group tdm-group-no timeslots timeslot-range
Example:
Router(config-controller)# channel group 1
timeslots 1-4
Note This step does not apply to the clear channel 4-port
T1/E1 HWIC.
Configures the serial WAN on a T1 or E1 interface by
specifying channels and their timeslots.
For T1, values are as follows:
• channel-group-number is from 0 to 23
• timeslots range is from 1 to 24
• Default value of speed in T1 is 64 kbps. Configuration
of speed is optional.
For E1, values are as follows:
• channel-group-number is from 0 to 30
• timeslots range is from 1 to 31
• Default value of speed in E1 is 64 kbps. Configuration
of speed is optional.
• unframed (E1 only) specifies that all 32 timeslots are
to be used for data, and that none are to be used for
framing signals.
or
Configures specified timeslots on T1 or E1 interfaces for
PRI for transporting ISDN data.
or
Configures specified timeslots on T1 or E1 interfaces to
create clear chanel groups for time division multiplexing.
For the tdm-group configuration to work, it is necessary to
configure network-clock-participate for the interface in
global configuration mode.
Step 13
national reserve N sa4 sa5 sa6 sa7 sa8
Example:
Router(config-controller)# national reserve 0 1
1 1 1 0
E1 only. Sets the 6 required national bits in E1 in the G.751
frame. Default is 1 1 1 1 1 1.
Step 14
crc-threshold value
Example:
Router(config-controller)# crc-threshold 500
T1 only. Defines a severely errored second by specifying the
number of crc errors that must occur in one second to reach
the severely errored state. Default is 320.
Command or Action Purpose