User`s manual

Version 5.4 467 May 2008
SIP User's Manual 9. Advanced PSTN Configuration
¾ To stop / delete an NFAS Group, take these 3 steps:
1. Stop / delete all NFAS (‘slave’) trunks.
2. Stop / delete the backup trunk if a backup trunk exists.
3. Stop / delete the primary trunk.
Notes:
• All trunks in the group must be configured with the same values for trunk
parameters TerminationSide, ProtocolType, FramingMethod, and
LineCode.
• After stopping or deleting the backup trunk, delete the group and then
reconfigure it.