MERLIN LEGEND Communications System Release 6.1
Feature Reference
555-661-110
Issue 1
August 1998
Features
Page 528Primary Rate Interface (PRI) and T1
Outgoing calls using call-by-call service selection can be made by pressing a line
button, pressing a Pool button, dialing a pool number, or using ARS.
The Call-by-Call Services Table must be programmed for the Call-by-Call Service
Selection feature to take effect. If a service is not specified in the table, the entry is
ignored.
An SMDR record is not recorded for any call on a PRI facility that is shorter than
the programmed SMDR Call Length. Usually, the SMDR Call Length is
programmed to compensate for connection and ringing time of calls on non-PRI
facilities before they are answered. For systems where most lines are PRI lines,
the call length should be programmed for one (1) second.
Feature Interactions 37
Account Code Entry At an extension assigned to a PRI line, either enter an account code
before the call is made or during the call. Forced account codes must be
entered before the call is made. An account code entered before a call is
treated as a restriction code for all the outgoing calls placed over the PRI
line.
If the SMDR feature is not enabled to record incoming calls, the system
does not accept Account Code Entry information for incoming calls.
Automatic Route
Selection
An incoming call can access ARS only through remote access,
transferring, or Remote Call Forwarding through ARS. A PRI line can be a
member of a pool accessed through ARS. Before ARS routes a call to a
pool, it determines whether one or more member lines in that pool are
available. If not, it selects an alternative pool so that the call is not
blocked. Even if a B-channel is available when ARS selects a pool with an
available line, there may be none available when it is time to send a setup
message to the network. Or, after the setup message is sent, the network
may determine that the B-channel proposed by the system is not
available. In either case, the call fails and fast busy tone is heard.
If an incoming call matches the ARS access code, it is routed to the
extension programmed for unassigned DID calls.
Barge-In Barge-In can be used on a PRI line. Users cannot barge into data calls.
Call Waiting Call Waiting is provided on PRI lines at extensions so programmed. The
call-waiting tone is not blocked from PRI at an extension. Until the call is
answered, answer supervision is not returned to the network and the
caller hears regular ringback instead of call-waiting ringback.
Call Waiting does not work with data calls.
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