Grandstream Digit Map / Dial Plan

August 2016

***This article is for informational purposes only. This is not a standard feature of the OnSIP Hosted PBX. This is the scope of our support.***

You are welcome to use the following information to enhance your OnSIP Experience, but technical support is not available from OnSIP for this feature. For assistance beyond the below document you will need to contact the hardware manufacturer/reseller directly.

As part of adding your Grandstream phone to the boot server, the field called "Custom Digit Map" is where the following digit map/dial plan would be added.

The default digit map is:
{ x+ | *x+ | *xx*x+ }

To get the phone to add a 1 to any 10 digit number, you need to make a change to that default map.  The following map does that.  This plan also allows for the * to be dialed, so *98 works, and it allows for extension numbers of any length.

{<=1>[2-9]xxxxxxxxx | [1]xxxxxxxxxx | *x+ | xx+}

or this one


Thanks, George K.!


Another option to add a one or even add an entire area code:


Example to add an area code (636) or, if dialing a local (314) area code, add the one:

Allow any combinations of numbers with 11 digits which has a leading digit 1

Add a leading 1 to all numbers dialed
< =1>

Allows dialing to area code starting with (3) by dialing 10 numbers and 1 will be added automatically

Thanks Daryl!


See our top business VoIP phone recommendations

Download the 2017 Business Phone Guide

Was this article helpful?
0 out of 0 found this helpful
Have more questions? Submit a request