Assigning Telephone Lines And Extensions; Providing Limited Telephone Service During Ac Power Outages; Analog Line Connection Order On Pstn Gateways; Connecting A Two-Line Wall Jack To The Pstn Gateway - AT&T SB67010 PSTN Installation Manual

Synapse Installation Guide

Assigning Telephone Lines and Extensions

This section discusses various telephone line configuration issues to consider.

Providing Limited Telephone Service During AC Power Outages

The fourth line on each PSTN Gateway is a Bypass port that works during AC power
PSTN Gateway
failures. If you have a PSTN line plugged into LINE 4, connect a line-powered analog
telephone to the RJ-11 jack labeled BYPASS for telephone service during power failures.
When power returns, a relay disconnects this emergency bypass line so that the bypass
line cannot be used to eavesdrop on normal calls.
If your telephone lines are part of a hunt group (a telephone company feature that allows
calls to a busy phone number to roll over to the next available telephone line), connect
the line with your main (pilot) telephone number to PSTN Gateway LINE 4.
The T1 Gateway and SIP Gateway provide no analog bypass port. To provide telephone
T1 Gateway, SIP
Gateway communication during power outages, either subscribe to at least one analog phone line
and install a PSTN Gateway or use uninterruptible power supplies to provide power to your
computer network, the Synapse T1 Gateway or SIP Gateway, and one or more Desksets.

Analog Line Connection Order on PSTN Gateways

For outgoing calls, the system first seizes the lowest idle PSTN port numbers (as labeled
on the PSTN Gateway). PSTN phone lines should be connected to your system with your
busiest incoming line placed in the highest port number on the highest numbered PSTN
Gateway, so that incoming calls are less likely to receive busy signals. For instance, if
your customer service team receives many calls, you would want to plug their phone
lines into higher-numbered PSTN ports.
If your system features both PSTN Gateways and a T1 Gateway, outbound calls are
placed first through the T1 channels by default. You can configure outbound call routing
using the Dial Plan settings.
For more information about Dial Plan settings, see the Synapse Administrator's
Guide at

Connecting a Two-Line Wall Jack to the PSTN Gateway

If you have two phone lines coming from one wall jack, you must use a two-line adapter
(or A/B splitter) as shown in Figure 4 to convert the two-line jack into two single-line
jacks. Each single-line jack will then connect to a Gateway LINE port.
Installation
www.telephones.att.com/synapseguides
To Gateway
Figure 4. Two-line Adapter
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To wall jack