Outgoing PC dialing:
An external access prefix (also referred as external dialing code) is the number on the telephone that must be used to make an external call. The entry of this number will be required for dialing from ProCall even for automatic external access on the telephone. Normally, the following external dialing codes are identical (default value: 0).
Determine external access prefix...
The wizard will provide support in determining the external access prefix (also known as "external dialing code", "trunk access code" or "outside line access code"). Access to a telephone at the location and an external telephone (cell phone) will be needed. If there is uncertainty about the external dialing code, start the wizard and follow its instructions. All settings for the external dialing code will be set automatically.