QUESTION Incoming PSTN display as unknown or anonymous

[Chris Gicale]

Good day!

Is it possible that incoming PSTN (Analog), which is configured as DAHDI trunk, able to display the caller's number in the extension phones.

Currently, it appear as "unknown" or "anonymous" in our extension phones once there is incoming PSTN.

Appreciate any idea (software or config or hardware).

Thank you.

 

[ostridge]

Does the PSTN provider require a subscription for the CLID service? or perhaps provide that by default?

I don't expect that the incoming caller has 'privacy enabled' to withold the number.

I don't use DAHDI so I don't know what you should expect.

Good luck.

 

[Chris Gicale]

@ostridge it is provided by default. Thanks for the response.
Appreciate if you could give me an idea of what will I need to do.

 

[islandtech]

pstn device configured for the correct type of caller id?

 

[Chris Gicale]

Sorry, but we have no caller id indicated. I have no idea how to do it or how to trace it.

 

[islandtech]

With a buttset listen for data sound between the first and second ring at the demarc
or connect a callerid device at the demarc.

 

[Chris Gicale]

Before, our telco provider said that it is not possible to put a callerid device since it's a group of analog pstn lines (trunks).
I guess it's a game over. Thanks @islandtech for the response. I really appreciate it.

 

[krzykat]

I usually don't use PSTN, but did one recently with a GXW4108 and I had to program it to not pass the call to the asterisk server until after 2 rings (callerID is passed between 1st and 2nd ring) - otherwise, I would not get callerID to pass.

 

[Chris Gicale]

@krzykat sounds interesting. I hope that idea is available in search engine

 

[islandtech]

Is it a trunk (E&M, DID, or the likes) or a pots line. Never heard of a pots line that couldn't do incoming caller id.

You didn't mention the type of analog device.
Like @krzykat said, I know that Grandstream and obhi needs the ring delay

 

[Chris Gicale]

It is a pots line @islandtech.
Thank you.

 

[krzykat]

It is a pots line @islandtech.
Thank you.

Then I assume the pause before answering resolved your issue?

 

[Chris Gicale]

Thanks @krzykat , I will search where to find that pause. And look for similar issue.

 

[Chris Gicale]

@krzykat , what is the recommended pause (in seconds?) for this subject to happen? How about signal ringing, should I need to enable it? Thanks!

 

[krzykat]

@krzykat , what is the recommended pause (in seconds?) for this subject to happen? How about signal ringing, should I need to enable it? Thanks!

I don't have access to the GXW4108 that I was doing this with - but I'll probably go by that site next week. If I recall right, it was close on the default - which I believe was pause of 3-4 seconds ... just try adjusting it till works and then scale back, then add an extra second for safety.

 

[islandtech]

Hi
on my gxw4104 I went to fxo settings, port called id settings, number of rings before pickup = ch1-4:2;
note the punctuation
that is 2 rings on ports 1 thru 4

 

[krzykat]

Sorry for the late reply, just now went by office with the FXO, so if you need further settings, ask me now before I leave there

 

[Chris Gicale]

Appreciate your response @krzykat . I will refer to this as my guide. Thank you!