MERLIN LEGEND Communications System Release 6.1
Feature Reference
555-661-110
Issue 1
August 1998
Features
Page 512Primary Rate Interface (PRI) and T1
Terminal Equipment Identifier (TEI) 32
This option assigns the link layer address of devices connected to each
D-channel. Usually, only one is connected; the network assumes that its TEI is 0.
PRI Call Processing 32
Figure 38 on page 513 shows the order of call processing for both incoming and
outgoing calls on PRI facilities connected to the public switched telephone
network; the section of the figure within the box applies specifically to call
processing on a system with PRI. An explanation of incoming and outgoing call
processing follows.
Incoming Calls 32
In Release 1.0 and 1.1 systems, incoming calls are routed by line appearance.
Beginning with Release 2.0, incoming calls also can apply routing by dial plan, a
routing system for incoming calls programmed by the Dial-Plan Routing Table
(see Table 33, page 515
).
NOTE:
In Release 6.0 and later systems (Hybrid/PBX mode only), where the
Switch Type setting is LEGEND-Ntwk or LEGEND-PBX for a PRI trunk,
incoming calls are automatically set to Route Directly to UDP. PRI routing
by dial plan and line appearance are not used. This cannot be changed
unless the Switch Type setting is modified.
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