Nortel SRG50, Руководство по настройке

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88 Chapter 6 Setting up the private VoIP network
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Call routing: providing access to the SRG50 PSTN
Access to the SRG50 PSTN is required for:
• calls to the SRG50 PSTN from SRG50 telephones or redirected SRG50 IP telephones
in local mode
• calls from the SRG50 PSTN to redirected SRG50 IP telephones in normal mode
• calls from main office telephones to the SRG50 PSTN, using the VoIP trunks
To achieve this access, a remote access package for the VoIP trunks and a destination code for the
PSTN must be configured.
Remote Access Package for VoIP trunks
The SRG50 views all calls coming in over the VoIP trunks as remote access calls, even though the
VoIP pathway is a dedicated trunk to another closed system.
To allow tandem dialing from the main office through the SRG50 PSTN, or to redirect SRG50 IP
telephones to use the SRG50 local PSTN, you must specify a remote package that provides access
to the PSTN line pool. This remote package is then assigned to each VoIP trunk.
To configure remote access packages
1 Set up a remote access package for the PSTN line pool ( Configuration > Telephony > Call
Security > Remote Access Packages ).
2 Assign the package to each VoIP trunk ( Configuration > Telephony > Lines > Active VoIP
Lines > All Lines panel > Trunk Type column > select the desired trunk from the table >
Details for Line details panel > Restrictions tab > Use remote package field).
Configuring PSTN destination codes
To allow SRG50 telephones to dial out over the PSTN and to allow main office telephones to
tandem out through the local SRG50 PSTN, you need to define a destination code that accesses the
PSTN line pool without an
External Number . Frequently, this code is 9, but it does not have to
be.
The following procedure provides a basic PSTN routing setup.
To configure destination codes for the PSTN
1 Access the Dialing Plan - Routing panel ( Configuration > Telephony > Dialing Plan >
Routing ) and select the Routes tab. Refer to the BCM50 Networking Configuration Guide
(N0027156) to:
a Add a new route (for the PSTN line pool).
b
Change the DN Type to Public .
c Leave the External Number field blank.