Lucent Technologies 7820-0802-003 manual Configuring channel usage, Admin read system System read

Configuring E1 Cards

Configuring channel usage

Configuring channel usage

You must specify how each of the 32 channels of an E1 line is to be used. By default, E1 channels are configured as switched. Each of the 32 channels of an E1 line can be configured for one of the following uses:

•Unused-Channel—Channel is unused. Send the single idle code defined for this channel.

•Switched-Channel—Switched channel, using either robbed-bit or D-channel signaling, depending on how the line is configured at a higher level.

•Nailed-64-Channel—A clear-channel 64Kbps circuit. This configuration does not require any setup information.

•D-Channel—Channel 16 (channel 17 in the TAOS unit interface) is used for ISDN D-channel signaling directed at the appropriate controller for the physical interface.

To specify the channel usage:

1List the Line-Interface parameters: admin> list line-interface

2Set the Channel-Usage parameter for the first channel:

admin> set channel 1 channel-usage=[unused-chan- nelswitched-channel nailed-64-channeld-channel] admin> write

Assigning telephone numbers to switched channels

Assigning telephone numbers to switched E1 channels is no different from assigning them to switched T1 channels. See “Assigning telephone numbers to switched channels” on page 7-19.

Configuring trunk groups

Like nailed channels that have been assigned a group number, switched channels in a trunk group can be referred to from a Connection profile and Call-Route profile to direct outbound calls to use that specific bandwidth. Trunk groups also serve a variety of other purposes, such as separating lines supplied by different carriers so those lines can be used as backup for each other if one switch becomes unavailable. The decision to use trunk groups is a global one. Once you have enabled the use of trunk groups, every switched channel must be assigned a trunk group number or it will not be available for outbound calls.

Trunk groups limit the number of channels available to multichannel calls, because only channels within the same trunk group can be aggregated.

To enable trunk groups, open the System profile and set Use-Trunk-Groups to Yes, as in the following example:

admin> read system SYSTEM read

admin> list name = "" system-rmt-mgmt = yes use-trunk-groups = no

9-14 APX 8000/MAX TNT/DSLTNT Physical Interface Configuration Guide