Digit Maps used to Define the Dial Plan

The following digit map syntax definition is used by Polycom to define phone specific dialing behavior. A phone dial plan is important for the phone to know when an entered number is complete and therefore the call should be initiated. If the phone does not know that dialing needs to be manually initiated by pressing the Dial softkey. If the phone digit map is define wrong, the phone might start to dial before you were actually able to enter all the digits you wanted to.

The Polycom phones allow the specification of a phone dial plan applicable to all the lines as well as a line specific setting that overriedes the general setting. This can all be configured using the plug & play management interface in the sipX configuration server.

Polycom Phone Default Dial Plan
The following string represents the default dial plan for 3-digit internal extensions used by the sipX configuration server release 3.0 for Polycom phones: 

[2-9]11|0T|011xxx.T|91[2-9]xxxxxxxxx|[1-8]xx

It means the following:

Note: The sipX server uses SIP methods for feature invocation and not star codes. However, there are a few rare occasions where a DTMF star code is needed. Star codes are not automatically dialled with the above default dial plan and require the user to press Send. Also, international calls do not require a "9" prefix, but LD calls do, which seems somewhat inconsistent.

Note: Should the phone refuse to let you dial a number do the following: Do not pick up the handset and do not press a line key. Instead dial the number first and once done press the line key you want to use. The phone now dials the digits entered disregarding its dial plan settings.

Revised Default Dial Plan String

As an alternative to the above default you might want to consider the following dial plan strings. Dial plan strings are best modified by creating a phone group and then change the dial plan string setting for the group.

This string allows three digit extensions including the range of 1xx. However, for LD calls a "9" prefix is required: 

[2-9]11|0T|011xxx.T|9011xxx.T|91[2-9]xxxxxxxxx|9[2-9]xxxxxx|*xx|[8]xxx|[1-7]xx

This string (my favorite) allows three digit extension excluding the range of 1xx (with the exception of 100 and 101). It further allows LD calls to be dialed with or without the "9" prefix: 

[2-9]11|0T|100|101|011xxx.T|9011xxx.T|1[2-9]xxxxxxxxx|91[2-9]xxxxxxxxx|9[2-9]xxxxxx|*xx|[8]xxx|[2-7]xx

Four digits extensions

This string allows four digits extensions, excluding the range of 1xxx and allows LD calls with or without the "9" prefix: 

[2-9]11|0T|100|101|011xxx.T|9011xxx.T|1[2-9]xxxxxxxxx|91[2-9]xxxxxxxxx|9[2-9]xxxxxxxxx|9RR952R[2-9]xxxxxxT|*xx[2-7]xxx|*4[2-7]xxx|[8]xxxx|[2-7]xxx

It means the following: