Pbx/Key System; Pbx; Key System - Cisco UC320W Administration Manual

Telephony

PBX/Key System

PBX/Key System
Cisco Unified Communications UC320W Administration Guide
Configuration > Telephony > PBX/Key System
Use the
operational mode for the telephony system. Tip: To learn more, use the Help Me
Choose button.
Note: If you change the mode after applying a configuration, errors may appear on
other pages, due to the feature differences described below. Fix the errors before
applying the configuration.

PBX

In PBX mode, users have no direct access to choose a phone line; instead, a trunk
is selected from the pool of available trunks. When placing an outbound call, you
must first press an outbound dialing digit such as 9. There are no shared FXO
(analog) lines (as described for Key System). When you choose PBX mode, the
following features are affected:
• Trunks: Phone service can be provided by SIP/BRI trunks (Voice over IP
service) and FXO (analog) lines.
• Shared FXO Lines: You cannot configure Shared FXO Lines. Note: If you
previously configured your system in another mode, any existing Shared
FXO Lines will be removed.
• Outbound Dialing: You can use personal extensions to place calls to an
external number.
• Internal Dial Plan: You need to specify the digit that is required for
outbound dialing. If you have more than one trunk, you can specify a
different digit for each trunk.

Key System

In Key System mode, users can directly choose an analog phone line by pressing
a shared line button on the phone. All users can monitor all calls on all lines. If a call
is placed on hold by one user, it can be resumed by any other user. When a user
presses a shared line button, the line is immediately seized for an outbound call;
you do not have to enter an outbound dialing digit, such as 9. When you choose
Key System mode, the following features are affected:
• Trunks: Phone service is provided by FXO (analog) lines. You cannot
configure SIP/BRI trunks (Voice over IP service). Note: If you previously
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page to choose the
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