Intracalling During Esa Mode; Esa Call Processing; Channel Configuration - Nortel DMS-100 Series Maintenance Manual

3-14 PRLCM overview
Additional LTC hardware
The additional hardware in feature package NTX154AA for the host LTC is
the messaging card, NT6X69. This card allows communications with the ESA
processor.

Intracalling during ESA mode

Intracalling provides the capability of switching calls at the remote location
during ESA mode.
The number of intra- and interswitched calls supported during ESA is
determined by the number of designated intracalling channels on the PRLCM.
The number of channels depends on the number of equipped PCM30 ports
available and the number of PCM30 links used for host communication.
During ESA mode, all the intracalling is handled through the ESA processor.
The ESA processor contains a subset of the translation data found in the DMS
CC.

ESA call processing

When the PRLCM is in ESA mode, the ESA CC handles line-to-line call
processing. See the figure ESA CC Basic Call Processing Structure.
The ESA CC has only one queue; therefore, all messages from the server are
sent to this first-in first-out queue for call processing. Before call processing
begins, terminal data are needed. Terminal data are gathered from the static
data downloaded from the DMS CC and the dynamic data stored in the
terminal status table (TST).
Channel configuration
On ESA entry, the C-side channel map of the PRLCM is reconfigured to
provide more interswitch channels for ESA call processing.
Inter- and intraswitch channels make call connections through the PRLCM
without involving a host connection. The inter- and intraswitch capability
allows call processing to continue in ESA operation.
On PRLCM ESA entry, the PRLCM channels are configured as if all PCM30
ports are unequipped except for primary ports 0 and 1. Ports 0 and 1 must be
equipped in PRLCM ESA.
297-8361-550 Standard 04.01 September 2000