CallerID from Samsung PBX line on FXO

Home » Asterisk Users » CallerID from Samsung PBX line on FXO
Asterisk Users 5 Comments


I’ve now set up Asterisk to interface with our current Samsung iDCS 100 PBX via an 8SLI analogue extension card in the Samsung and an Openvox A400P04 4-FXO card in the Asterisk box. It all works in that I can place calls in both directions from the office Samsung extensions and Asterisk SIP extensions. The only tricky bit was getting the FXO to detect hang-up from the Samsung correctly – a tweak on the Samsung config to make it hang up properly fixed this.

So far Asterisk has been a joy to configure (apart from the default config which IMO should be stripped back to bare-bones and the config shipped as examples in the doc folder – this may be the fault of my distribution who’s packages I used rather than get in to the hassle of software maintenance).

The problem I’m trying to solve at the moment is getting caller ID info passed over to the SIP phones when calls are placed. The caller ID is coming through as ‘asterisk’ which I assume is the default if nothing is present. So does anyone have any idea on how to get caller ID info passed over from the incoming calls on the FXO lines? Or even how to find out if the caller ID info is being sent by the Samsung?

Thanks for any help.


5 thoughts on - CallerID from Samsung PBX line on FXO

  • Ronny Adsetts wrote:
    Assuming the Samsung is using the standard US method, a butt set across
    the output of one of the lines in monitor mode should allow you to hear
    the FSK tones between the first and second ring.
    Or a cheap CallerID box should display as well.

    Also assume you have the Asterisk end set to wait for the signal. there
    should be a one ring delay in the response from Asterisk as it waits for
    the FSK signal.

    John Novack

  • John Novack said at 13/11/2010 12:58:

    I’ve tried a variety of options but currently have the following in the [channels] section of zapata.conf:


    I added the following to one of the FXO contexts:

    exten => s,1,Verbose(1,Samsung 209 ${CALLERID(all)})

    And I get the following:

    Executing [s@samsung-209:1] Verbose(“Zap/1-1”, “1|Samsung 209 “” <>“) in new stack

    Not sure what ” <>” means but I assume it’s something like a null string?

    Anyway, that’s as successful as I’ve been, ie., not. :-).


  • At 05:56 AM 11/13/2010, you wrote:

    Try changing that line to:

    exten => s,1,wait(1) or maybe wait(2)

    That’s what I had to do when I first set up Asterisk. Gives Asterisk
    time to get the CID.


  • Ronny Adsetts wrote:
    What method does the Samsung use to send CLID?
    For US systems, the FSK signal is between the first and second ring, is
    NOT dtmf, and cidstart=ring isn’t correct
    You need to state where in the world the samsung thinks it is, and how
    it is configured to send CLID.
    If it isn’t US, then others will have to help
    In the US Asterisk will insert the proper delay when you state

    John Novack

  • Ira said at 13/11/2010 17:50:

    Right. Thanks for that pointer. I’ll tweak the Wait() time once I’ve figured out how the Samsung is actually sending the data, ie., in what format.