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Changing Settings to Support
PBX or Centrex Services
This section applies only if you use PBX or Centrex services with your system. If it does not apply, go to the next section, “System Programming Options.”
■PBX services are provided by a private telephone switch.
■Centrex services are provided by your local telephone company from a Central Office (CO) outside your premises. These services include the Centrex lines connected to your control unit modules and some set of
Some of the issues you should consider when setting up your system to work effectively behind a PBX or Centrex system are discussed below. Chapter 5 explains how to use the programming procedures discussed here.
Recall Setting
To set up your equipment to work properly with a PBX or Centrex system, first set Recall Timer Duration (#107) to match the setting used by your PBX or Centrex system (usually 800 msec., or 32). This setting affects the length of a Recall signal sent by the control unit to access Centrex services.
Dialing Restrictions
Outgoing Call Restriction (#401) is an equipment restriction intended to limit
an extension’s dialing to “inside calls only” (using the Intercom[ ] buttons on system phones) or to “inside and local calls only” (allowing calls within the PBX or Centrex system and local calls outside the PBX or Centrex system). However, if users in your system use a
If your PBX or Centrex system includes dialing restrictions, use those instead of the equipment restrictions. If you have PBX or Centrex dialing restrictions on a line and also program equipment restrictions, both the PBX or Centrex system and equipment restrictions apply. However, equipment dialing permissions will not override PBX or Centrex system restrictions.
Speed Dial and Auto Dial Numbers
When you program numbers outside the PBX or Centrex system as Speed Dial and Auto Dial numbers, include the PBX or Centrex system