[Asterisk-Users] ISDN/CAPI outgoing calls - weirdness with ringing

[Michael J. Tubby G8TIC]

Armin,

Please find attached the log file for 4 x test calls:

1. Call to Orange GSM mobile phone (effectively ISDN all the way) - works as 
expected

2. Call to BT analogue phone (we still have a lot of analogue in the UK) - 
no ringing problem (stuck in Session Progress)

3. Call to C&W analogue phone (local loop unbundling operator) - double 
ringing problem

4. Call to SIPgate/Magrethea number (complex call routing) - works as 
expected (I am slightly suprised :o)


Set up is:

- Fedora Core 4, on P4 3.2GHz, 1Gb RAM

- AVM C4 with:
    - 2 x ISDN2e in P2P mode on 01905756700/01905755777/0190475289x
    - 1 x ISDN2e in P2MP for other bits
    the main number is 01905756700

- Asterisk 1.2.1

- Chan-capi-cm-0.6.1

all cleanly compiled and re-installed for testing.


I use a macro for placing the outgoing calls (copy at the start of the log)
which aides with debugging and ensures the correct '6700' number (main
PBX number) is used.

All tests dialled with the macro provided and using just the 'b' flag.

Look forward to your comments with interest.


Regards


Mike



----- Original Message ----- 
From: "Armin Schindler" <armin at melware.de>
To: "Michael J. Tubby G8TIC" <mike.tubby at thorcom.co.uk>
Cc: "Asterisk Users Mailing List - Non-Commercial Discussion" 
<asterisk-users at lists.digium.com>
Sent: Tuesday, December 27, 2005 6:37 PM
Subject: Re: [Asterisk-Users] ISDN/CAPI outgoing calls - weirdness with 
ringing


> On Sun, 25 Dec 2005, Michael J. Tubby G8TIC wrote:
>> > On Sat, 24 Dec 2005, Michael J. Tubby G8TIC wrote:
>> > > I changed the dial-string to include flags 'ob' as you mentioned
>> > > (below)
>> > > and now I get the following when I dial a BT phone number
>> > >
>> > > - dial number, get:
>> > >
>> > > Proceeding (in 100) briefly
>> > >
>> > > - after a second or so:
>> > >
>> > > Ringng Destination (in 180)
>> > >
>> > > - double ringing tone:
>> > >
>> > > BT style ringing generated by the exhange
>> > > Cisco phone US-style ringing (generated by the phone)
>> > >
>> > > these are overlaid on each other (mixed together)
>> > >
>> > >
>> > > My hunch is that there's something not right with the call set up
>> > > sequence
>> > > and CAPI handling.
>> >
>> > This is not a problem of CAPI. When you specify 'b' for early-b3, you
>> > will
>> > get the tones from the switch. If your phone adds its own tone, even 
>> > when
>> > it
>> > receives progress tones, then it is incorrect (maybe wrong setup).
>> >
>> > Armin
>> >
>>
>>
>> However the difference that I see looking at the Cisco 7960 phone which
>> shows a version of the SIP messages on its status line is:
>>
>> 100 Proceeding
>> 183 Session Progress
>> 180 Ringng Destination
>>
>> the order of which varies and depends on the dialled number.
>>
>> Some dialled numbers go: 100->183->180 and these produce one set
>> of alerting/ringing correctly.
>>
>> Some dialled numbers go: 100->183 and stay in state 183 until the called
>> party answers - these are the ones that produce no ringing.
>
> Can you provide a verbose log level 5 with 'capi debug' ?
> I would like to compare the capi messages. Maybe the switch just send an
> alerting message.
>
>> If I add the 'o' to the existing 'b' flag then dial it appears to change 
>> the
>> behaviour so that the phone goes 100-180 for all calls but some give
>> me a single (phone generated US style ring) while others give the 'double
>> ringing'.  The ones that produce double ringing are the ones that would
>> have rung before, while the ones that now produce ringing (from the
>> exchange) are the ones that used to be silent.
>
> When using 'o', chan_capi is doing early-b3 from the beginning before
> sending any digits and you will get b3-data in each case.
> Please send me a debug log of a connection with double ring-tone (no 183)
> as well.
>
>
> Armin
> 
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