
Chapter 19 BRI ISDN: BRI T-loops 225
BCM 4.0 Networking Configuration Guide
Configuring BRI T-loop parameters
To configure BRI T-loop parameters
1 Identify the loop as a T-loop (refer to “Configure loop type and general parameters” on
page 233).
• Protocol (ETSI and ETSI-QSIG loops, only)
• ONN block state
• Overlap receiving
• Overlap length
• Send name display (ETSI-QSIG only)
2 Enter the details for the loop (refer to “T-loop SPIDS and network DNs” on page 235).
North American systems only:
•SPID
• B-channel
•Network DN
• Call type
ETSI and ETSI-QSIG T-loops (UK profile)
• Clock source
3 If applicable, configure D-packet service for the loop (refer to “T-loops D-packet service” on
page 237).
4 Provision the loop and the loop lines (refer to “Provisioning module lines/loops” on page 132).
5 Program the BRI lines (refer to “Configuring BRI lines” on page 225). If the lines are set to
auto-answer, put the lines into line pools (A to O) and configure target lines.
6 Assign the lines/line pools and target lines to the telephones. Refer to Line Access - Line
Assignment tab and Line Access - Line Pool Access tab in the BCM 4.0 Device Configuration
Guide (N0060600).
Configuring BRI lines
There are two lines for every ISDN BRI loop that is designated as a T-loop. Unlike PRI lines,
these lines can be set to either manual or automatic answer when using for remote call-ins.
The following paths indicate where to access the line configuration menu through Element
Manager and through Telset Administration:
• Element Manager: Configuration > Telephony > Lines > Active Physical Lines, Inactive
Lines, All Lines
• Telset interface: **CONFIG > Lines
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