Armin,
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.
I'll send you some protocol traces off list.
Regards
Mike
----- Original Message -----
From: "Armin Schindler" <[EMAIL PROTECTED]>
To: "Michael J. Tubby B.Sc (Hons) G8TIC" <[EMAIL PROTECTED]>
Cc: "Asterisk Users Mailing List - Non-Commercial Discussion"
<[email protected]>
Sent: Sunday, December 18, 2005 3:12 PM
Subject: Re: [Asterisk-Users] ISDN/CAPI outgoing calls - weirdness with
ringing
On Fri, 16 Dec 2005, Michael J. Tubby B.Sc (Hons) G8TIC wrote:
All,
I have the following set up:
Fedora Core 4 box (yum updated to current)
Asterisk 1.2.1 + Chan_Capi-cm-0.6.1
AVM C4 card
2 x ISDN2e lines bonded with switchboard number, fax number and 10 x DDI
numbers from British Telecom
14 x Cisco 7960 phones with SIP 7.5
The ISDN lines work in P2P mode and calls are presented with the last 4
digits
only - I land them in a context and branch out from there - everything to
do
with incoming calls works just fine!
I have a problem with outgoing calls that are routed over the BT network
and
the way in which 'ringing' is presented... depending on the called party
number (hence phone provider) I get different results. For example:
a) if I dial another BT number I get a fraction of a second's ring
followed by
silence until the called party answers. The Cisco phone displays:
Proceeding (in 100)
very briefly and is almost immediately over-written by:
Session Progress (in 183)
until the called party answers - at no point is Ringing Destination (in
180)
displayed
b) if I dial an Orange or O2 mobile number I get a second or two's worrth
of
silence [while the Orange network locates the mobile] then the mobile
rings in
the normal way and the Cisco phone plays out US style ringing. When the
number
is dialled the phone displays:
Proceeding (in 100)
when the mobile starts to ring the Cisco phone displays:
Ringng Destination (in 180)
c) if I dial a Bulldog phone number then I get three messages:
Proceeding (in 100) - for a second or so
Session Progress (in 183) - for a couple of seconds
Ringng Destination (in 180) - while the called party's phone rings
d) and the really weird one - if I dial *some* international numbers I
get
both UK (BT) ringing tone overlaid with Asterisk/VoIP (US) ringing tone
I have two ways of dialling out:
1. with an explicit "9" for an outside line -- get dialtone from BT and
then
dial rest of the digits - like a legacy PBX
2. dialing just based on the fact that the extension starts with a zero
so its
an outside call via BT
I have tried all combinations of early B3 connect 'always', 'on success'
and
'never' and it doesn't appear to change things... the relevant part of
extensions.conf is below for completness.
Before I dive in to the next level down:
- is this a known issue?
- is there a solutiuon/workaround/patch/fix
- do I need to get down and dirty with CAPI and SIP debug?
Have you tried CAPI-Dial option 'o' ? Together with 'b' it should give
you progress in any case.
Armin
Mike
;
; external-routes: this is where we get to dial out
;
[external-routes]
;
; outgoing via main ISDN line using explicit "9" for an outside line
; and ISDN eqarly B3 connect ("overlap sending") to drop us to the
; BT provided dialtone and work like a normal/legacy phone system -
; we force the caller ID to our exchange number so that DDI's dont
; leak out
;
exten => 9,1,NoOp("ISDN: Pickup outside line (early B3 connect) for:
${CALLERIDNUM}")
exten => 9,2,SetCallerId(${THORCOM_MAIN})
exten => 9,3,Dial(CAPI/g1//b)
exten => 9,4,Hangup
;
; implicit trunked call - here we could/should do an ENUM look
; up to see if we can place the call via IP and fall back to BT
; if not... just for now this isn't implemented and we always call
; out via BT!!
;
exten => _0.,1,Dial(CAPI/g1/${EXTEN}/b) ; early B3
connect
always
;exten => _0.,1,Dial(CAPI/g1/${EXTEN}/B) ; early B3
connect
on success
;exten => _0.,1,Dial(CAPI/g1/${EXTEN}) ; no special
options
exten => _0.,2,Hangup
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