Pstn access and analog devices, Pstn access considerations, Analog devices considerations – Nortel Networks SRG50 User Manual
Page 79: Chapter 7
79
SRG50 Configuration Guide
Chapter 7
PSTN access and analog devices
SRG-specific items relevant to PSTN trunks and analog devices include:
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PSTN access considerations
Consider the following for PSTN access:
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PSTN access
To provide access to the SRG PSTN when the SRG is in local mode, or to be able to
set up tandem dialing from the main office through the SRG to the SRG PSTN, one or
more PSTN trunks must be configured on the system. See the Networking
Configuration Guide (NN40020-603).
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Tandem calls
The SRG considers 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 to the SRG PSTN, or to allow redirected
SRG IP telephones to use the SRG local PSTN, a remote access package must be
specified to provide access to the PSTN line pool. This procedure is covered in
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Manual- and auto-answer lines
If the trunk is configured as a manual-answer line:
Enter the line pool access code and the dial string for the main office attendant
telephone in the Redirect to field (Configuration > Telephony > Lines > Active
Physical Lines).
If the line is an auto-answer line in normal mode, incoming call requests are
automatically call forwarded to the main office. When the SRG IP telephones revert to
local mode, the system discontinues Call Forward All Calls and calls are delivered
directly to the SRG IP telephones at the SRG.
Analog devices considerations
Consider the following for analog devices:
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Basic operation
Analog telephones and devices connected to the SRG always function as local
telephones to the SRG. They can use the VoIP trunk to the main office using access
codes or destination codes, if the VoIP trunk line pool is assigned to the device, but the
main office does not have any settings or administration for these devices.