Instruction manual

Multiple network regions per C-LAN
Issue 4 May 2003 167555-233-767
Multiple network regions per C-LAN
Multiple network regions per C-LAN enables a single C-LAN to provide
registration and call control to IP endpoints in multiple network regions.
Communication Manager implements this approach by allowing IP address to be
mapped to network regions in a mapping form, instead of just to a C-LAN. When
an IP phone registers, the switch will determine the phone’s network region
number based on the phone’s IP address.
Power failure transfer
Provides service to and from the local telephone company central office (CO),
including wide area telecommunications system, during a power failure. This
allows you to make or answer important or emergency calls during a power
failure. This feature is also called emergency transfer.
Survivable Remote EPN (SREPN)
The Survivable Remote Expansion Port Network (SREPN) allows a DEFINITY
ECS (R6r or later) EPN to provide service to the customer when the link to the
main processor fails or is severed or when the processor or CSS fails. When the
links to the system are restored and stable, the logic switch is manually reset and
the EPN is reconnected to the links from the switch. There are both command and
manual resets. The resets can be done remotely at the SAT or manually at the
equipment.
The SREPN must be administered separately (not as a duplicated PPN) to
function in a disaster recovery scenario. It does not function as a survivable
remote EPN without the administration (stations, trunks, features) to support its
operation.
NOTE:
SREPN is not compatible with ATM port network connectivity
(ATM-PNC). If that’s the case, see ‘‘WAN Spare Processor (WSP)’’ on
page 123.