[asterisk-users] time/date over POTS?

[Dave Fullerton]

Jeff LaCoursiere wrote:
> On Thu, 4 Mar 2010, Dave Fullerton wrote:
> 
>> Jeff LaCoursiere wrote:
>>> I had a customer ask me about time/date information being sent to his
>>> analog (attached to a Linksys SPA2102) answering machine.  I didn't know
>>> that POTS could carry this information.  Is this something Asterisk could
>>> send over SIP?
>>>
>>> Cheers,
>>>
>>> j
>>>
>> Time and date info on a POTS line is part of the caller ID stream. It is
>> up to the analog endpoint sending the caller ID stream to know the
>> current time to send. Anything that works with SIP should also have NTP
>> capabilities and should be getting its time using that.
>>
>> -Dave
>>
> 
> Aha.  Sadly I know that the incoming calls from our PSTN provider (over 
> RBS T1) do NOT carry caller ID, so what we are passing on via SIP to the 
> Linksys box must also be missing the time info.
> 
> Is there any way to add that to the outgoing call to the Linksys box?
> 
> Cheers,
> 
> j

The time and date in your case is being generated (or should be) by the 
sipura, not whatever is sending the call to the sipura. Time and date 
information is not included in SIP caller ID (to my knowledge). It's up 
to the SIP endpoint to know what time it is. Check the NTP settings on 
the sipura to make sure it is syncing its time with an internet time server.

-Dave