Variables on DOD of the extensions


I have an important project for a UCM6510 with about 250 GXP phones, the Customer asks me something special about DOD:
Example scenario: (see the attached photo, these are examples I’m doing in the Laboratory with UCM6208),

  • all outgoing extensions exit with the DOD 0237929100
  • extension 149 only comes out with DOD 0237929100
    So far, everything is clear to me.
    The customer asks me the possibility for each extension to be able to choose each call through a code or a procedure if exit with DOD 0237929100 (which is the base number), or with DOD 02379291xx (xx = depending on your extension that makes the call external.
    This Customer request is very important to be able to sell the Grandstream Product.
    Does anyone have any idea if and how it can be done?
    I hope I was clear,

thank you


Dynamic switching of CID is not supported currently in the UCM.


The only way I can see to do this is to give each person two extensions with each extension going to the different DOD. So the person will just choose their extension A to call out showing number 1 and extension A to show number 2.


yes I got there, but with 250 extensions doing this thing is crazy, I was hoping there was a different solution



You can try with DOD 0237929 then click on add extension and select extension !
dont forget to click on add extension.


I have had this scenario with both UCM and 3CX. One of our SIP suppliers has a short code service whereby we can do this. We prefix a number with a short code, the SIP registrar recognises this and adds the appropriate CID to the SIP header. This only works with numbers assigned to the trunk but we’ve been using it for a couple of years and it works well and overcomes an issue that comes up a lot.
Try your SIP provider to see if they can do this


unfortunately you can not because each extension can only be part of a DOD



I had the same problem with fewer posts
(is the 023 Swiss?)
the solution that I find is to create a fictional intern
with the exit number 02372991xx
and the program on account 2 of your GXP
and, to make a call you press the key (2) to display the number you give it



@Alain 0237929 was an example, however I know that we are talking about two different things

  1. if I understand correctly you want the 148 or another phone
    to have the possibility to display 2 numbers out
    then you program a new number (extention example 150) you give him (Calle ID number 02937291xx).
  2. on the GXP (account 2) you program the 150
  3. to call you push the key and you display the number 150 (Calle ID number 02937291xx)
  4. If you want the number of the company, you will normally pick up


I would like to be able to get out of my extension 210 (of your choice) or with my DOD -> example 02345210 or with base number example 02345200.
But it seems that unfortunately it is not possible at present