
Chapter 8 Lines overview 99
Networking Configuration Guide
• Voice over IP (VoIP) trunks use the data network to provide line service in and out of the
system. VoIP trunk configuration is described in the. VoIP trunks use target lines for incoming
calls, and require line pool codes or destination codes for outgoing calls.
• You can assign a line a maximum of 93 times.
Incoming calls
For incoming calls, you can have a central answering position, or you can specify lines to one or
more telephones to receive directed calling.
You can arrange your telephones in Hunt groups, ringing groups, or call groups that use
system-wide call appearance (SWCA) assignments to share calls.
You can also configure lines for use by system users who call in from outside the system. You can
give them direct access to the system with an Auto DN, or you can configure the line so they hear
a stuttered dial tone, at which point they need to enter a password (CoS) to gain access
(DISA DN).
Outgoing calls
For outgoing calls, you can assign one or more intercom keys to access a line pool or prime line,
destination code, or internal system numbers to direct the call. Telephones without intercom keys
do require intercom paths assigned, but to access calls, users must pick up the handset to connect.
For calls within the system, all telephones are virtually linked within the system. To call another
telephone inside the system, you can lift the handset and dial the local DN. In this case, the prime
line must be set to intercom.
For calls going outside the system:
• If you assign the prime line to a line pool — When you pick up the handset, the telephone
automatically grabs the first available line from the assigned line pool. In this configuration,
you must ensure that the outgoing number is allowed by the line pool.
• If you assign the prime line to an intercom button — You can enter a line pool access code or a
destination code followed by the telephone number to direct the outgoing call where it exits
the system on any available line in that pool.
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