[asterisk-users] DAHDI - analogue, not seeing ringing (UK)

[--[ UxBoD ]--]

----- "Gordon Henderson" <gordon+asterisk at drogon.net> wrote:

> So made my first forray into 1.4 and DAHDI and hit a problem. (Not 
> convinced this is a DAHDI issue though...)
> 
> Testing an analogue line and asterisk sees the caller ID being passed,
> but 
> then fails to detect ringing. A plain old analogue phone plugged in
> rings 
> just fine.
> 
> Console output:
> 
>    == Starting post polarity CID detection on channel 4
>      -- Starting simple switch on 'DAHDI/4-1'
> [Jul 31 11:38:51] NOTICE[25970]: chan_dahdi.c:6671 ss_thread: CallerID
> number: 01364698123, name: (null), flags=4
> [Jul 31 11:38:54] WARNING[25970]: chan_dahdi.c:6688 ss_thread: CID
> timed out waiting for ring. Exiting simple switch
>      -- Hungup 'DAHDI/4-1'
>    == Starting post polarity CID detection on channel 4
>      -- Starting simple switch on 'DAHDI/4-1'
> [Jul 31 11:39:18] WARNING[25971]: chan_dahdi.c:6688 ss_thread: CID
> timed out waiting for ring. Exiting simple switch
>      -- Hungup 'DAHDI/4-1'
> 
> This system has 2 analogue lines on ports 4 and 3. The one on port 3
> works 
> fine - the 'fault' stays with the BT master socket, so swapping
> cables, 
> ports on the asterisk side doesn't help.
> 
> It does sometimes work, which is annoying, but more offten doesn't
> work 
> than it does.
> 
> Anyone seen this before?
> 
> The lines are a long way from the BT exchange if that's an issue -
> some 
> 4-5Km... (ADSL on the other line only gets 3Mb/sec)
> 
> Could it be a ringer voltage issue at the BT side of things?
> 
> I'm trying to replace an ancient BT Analogue PBX here - which
> obviously 
> "just works" when plugged back in..
> 
> Any clues appreciated...
> 
> Gordon
Gordon,

Cast your mind back as I had a similar issue ... changing the cable sorted it for me!

Best Regards,

-- 
SplatNIX IT Services :: Innovation through collaboration