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AT-T SYN 248 Manual

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Syn248 Installation and Configuration Guide Back to Contents
Installation 13
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 Gateway is a Bypass port that works during AC power failures. If
you have a telephone 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 and the line is idle, 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 Gateway LINE 4.
Analog Line Connection Order on Gateways
For outgoing calls, by default the system seizes the lowest idle LINE port numbers (as
labeled on the Gateway) when users go off hook. You can also configure the automatic
off-hook line selection for each extension (see “Extension Basic Settings” on page 47).
If you plan not to change the default settings, telephone lines should be connected to
your system with your busiest incoming line placed in the highest port number on the
highest numbered Gateway (that is, Gateway #2 if you have the maximum two Gateways
installed), 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 LINE ports.
Connecting a Two-Line Wall Jack to the 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 2 to convert the two-line jack into two single-line
jacks. Each single-line jack will then connect to a Gateway LINE port.
Figure 2. Two-line Adapter
To wall jack
To Gateway
… 14 …


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