Filter
Top Products
7-18 Preliminary May 9, 2000 APX 8000/MAX TNT/DSLTNT Physical Interface Configuration Guide
Configuring T1 Cards
Configuring channel usage
To specify CSU settings, proceed as in the following example after reading in the line’s T1
profile:
admin> set front-end-type = csu
admin> set csu-build-out = 7.5-db
admin> write
Configuring channel usage
You must specify how each of the 24 channels of a T1 line is to be used. By default, T1
channels are configured as switched. (If you are going to set up the lines for NFAS, see
“Configuring NFAS” on page 7-13 for additional channel-configuration information.)
You can configure each of the 24 channels of a T1 line for one of the following uses:
• unused-channel—Channel is unused. Send the single idle code defined for this
channel.
• switched-channel—A switched channel, which will be robbed-bit or D channel,
depending on how the line is configured at a higher level.
• nailed-64-channel—Clear-channel 64Kbps circuit. Does not require any setup
information.
• d-channel—Channel is used for ISDN D channel signaling directed at the appropriate
controller for the physical interface.
• nfas-primary-d-channel—The primary D channel for a group of T1 lines with the
same NFAS ID. All other channels on the NFAS line must be set to
switched-channel, nailed-64-channel, or unused-channel. Within an
NFAS group, only one line should be configured to provide the primary ISDN D channel.
• nfas-secondary-d-channel—The secondary D channel for a group of T1 lines
with the same NFAS ID. All other channels on the NFAS line must be set to
switched-channel, nailed-64-channel, or unused-channel. Within an
NFAS group, you configure only one line to provide the secondary (backup) D channel.
To specify the channel usage:
1 List the Line-Interface parameters:
admin> list line-interface
2 Set the Channel-Usage parameter for the first channel:
admin> set channel 1 channel-usage=[unused-channel |
switched-channel |nailed-64-channel| d-channel| nfas-pri-
mary-d-channel| nfas-secondary-d-channel]
admin> write