Nortel BCM 3.7, Руководство пользователя

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Creating Direct Inward System Access (DISA) 303
Programming Operations Guide
Remote access on DPNSS lines
A remote caller can access a Business Communications Manager system dial tone, select a line
pool that contains exchange lines or DPNSS lines, then dial a number. The procedure is identical
to dialing an outside number from an extension in the local system. The main features are:
• Calls coming from another switch to the Business Communications Manager system are
routed in two ways, depending on the Answer mode that you program. If the
Answer mode is
set to Manual , and the line is assigned to ring at an extension, the incoming call automatically
rings at the assigned extension. If Answer mode is set to Auto , Business Communications
Manager automatically answers the incoming call. Because most other DPNSS features are
extension-specific, Nortel Networks recommends that all DPNSS lines are configured as
auto-answer lines.
• The Page feature is available to both remote callers and callers within the system. A remote
caller must have DTMF capability to access the Page feature.
• The line redirection feature allows the originating party to redirect a call that is waiting a
connection or re-connection to an alternate destination after a time-out period. Failed calls can
be redirected. Priority calls cannot be redirected.
Remote access on a private network
Systems connected to the private network deliver the last dialed digits to the destination Business
Communications Manager system for interpretation. The destination Business Communications
Manager system matches the digits to a target line or interprets the digits as a remote feature
request. Business Communications Manager then routes the call to the specified target line or
activates the remote feature.
• By default, T1 E&M trunks are set to answer with DISA. For auto-answer T1 E&M trunks
connected to a private network, change the default so that the trunks are
not answered with
DISA. If an auto-answer T1 E&M trunk is configured to answer with DISA, the system tries to
interpret any received digits as a COS password.
• The DISA DN and the Auto DN allow auto-answer private network and DID calls, in the same
way that calls on auto-answer loop start and auto-answer T1 E&M trunks can be answered,
with or without DISA. These DNs are described in
“Understanding access codes” on page
320 .
• Answer with DISA cannot be administered to a PRI trunk. Instead, you can program the dialed
digits to match those of a specific target line DN, the DISA DN or the Auto DN on the other
system.
• Answer with DISA cannot be administer to voice over IP (VoIP), since they do not connect
systems outside the private network. However, a user calling in remotely on another system on
the network can use the trunk to access the system or a user calling in on a PSTN line can use
the trunk to access the private network. To provide control for this type of access, ensure that
you specify remote access packages for the trunk.