[cisco-voip] What could cause a "buzzing" rather than call progress tones?
Ryan Ratliff
rratliff at cisco.com
Wed Jan 21 10:13:47 EST 2009
So the call is looping through the Adtran?
13:22:40 lon [ADT]:|1|2|==========
13:22:40 lon [ADT]:|1|2|Recd = Sapi:00 C/R:C Tei:00
13:22:40 lon [ADT]:|1|2| Ctl:INFO Ns:25 Nr:22
13:22:40 lon [ADT]:|1|2| Prot:08 CRL:2 CRV:8017
13:22:40 lon [ADT]:|1|2| M - 01 ALERTING
13:22:40 lon [ADT]:|1|2| IE - 1E PROGRESS INDICATOR Len=2
13:22:40 lon [ADT]:|1|2| 84 Location:RLN
13:22:40 lon [ADT]:|1|2| 82 Description:DEST. NOT ISDN
13:22:40 lon [ADT]:ISDN|1|2|Call to '0013123963808' ringing.
13:22:40 lon [ADT]:|1|3|==========
13:22:40 lon [ADT]:|1|3|Sent = Sapi:00 C/R:C Tei:00
13:22:40 lon [ADT]:|1|3| Ctl:INFO Ns:37 Nr:45
13:22:40 lon [ADT]:|1|3| Prot:08 CRL:2 CRV:8017
13:22:40 lon [ADT]:|1|3| M - 01 ALERTING
13:22:42 lon [ADT]:|1|2|==========
Here you receive an Alerting message from BT with a PI indicating
that audio should be cut through for ringback in-band. The outbound
Alerting to the 2851 is missing this PI, which should cause CM to
generate ringback.
Have you looked to see what CCM thinks it is receiving for this
call? It should be pretty clear whether the phone is being told to
play a tone (insideRing, etc) or has audio set up to the gateway
(OpenReceiveChannel, etc).
-Ryan
On Jan 21, 2009, at 8:46 AM, Robert Kulagowski wrote:
Over in the U.K., I've got an Adtran Atlas 830 terminating two PRIs
from BT and sending 2 PRIs to a 2851 VGW running MGCP. CM is 4.1.3.
A 3rd PRI is generated to a Codian 3241.
Outbound calls are generating a "buzzing" sound rather than actual
call progress tones (like Ring, busy, etc). I called Adtran tech
support and we went over the configuration of the Adtran. From the
logs, the Adtran is just passing ISDN setup messages over the D
channel like it's supposed to, and the audio path isn't established
until the called party goes off-hook.
Here's the traces from the Adtran:
|1|3| is the E-1 to the 2851. So here's the Adtran receiving an
outbound call setup from the 2851 to the PSTN
13:22:36 lon [ADT]:|1|3|Recd = Sapi:00 C/R:R Tei:00
13:22:36 lon [ADT]:|1|3| Ctl:INFO Ns:44 Nr:36
13:22:36 lon [ADT]:|1|3| Prot:08 CRL:2 CRV:0017
13:22:36 lon [ADT]:|1|3| M - 05 SETUP
13:22:36 lon [ADT]:|1|3| IE - A1 SENDING COMPLETE Len=0
13:22:36 lon [ADT]:|1|3| IE - 04 BEARER CAPABILITY Len=3
13:22:36 lon [ADT]:|1|3| 80 Xfer Cap.:SPEECH
13:22:36 lon [ADT]:|1|3| 90 Xfer Rate:64k
13:22:36 lon [ADT]:|1|3| A3 Layer 1:G.711 A-Law
13:22:36 lon [ADT]:|1|3| IE - 18 CHANNEL ID Len=3
13:22:36 lon [ADT]:|1|3| A9 Primary Rate
13:22:36 lon [ADT]:|1|3| Intfc ID:IMPLICIT
13:22:36 lon [ADT]:|1|3| Pref/Excl:EXCLUSIVE
13:22:36 lon [ADT]:|1|3| D-Chan Indicated:NO
13:22:36 lon [ADT]:|1|3| Chan. Sel:FOLLOWS
13:22:36 lon [ADT]:|1|3| 83 Numb/Map:NUMBER
13:22:36 lon [ADT]:|1|3| 9f Channel:31
13:22:36 lon [ADT]:|1|3| IE - 6C CALLING PARTY # Len=8
13:22:36 lon [ADT]:|1|3| 00 Numb. Type:UNKNOWN
13:22:36 lon [ADT]:|1|3| Numb. Plan:UNKNOWN
13:22:36 lon [ADT]:|1|3| A1 Presentation:RESTRICTED
13:22:36 lon [ADT]:|1|3| Ph.# 504955
13:22:36 lon [ADT]:|1|3| IE - 70 CALLED PARTY # Len=14
13:22:36 lon [ADT]:|1|3| 80 Numb. Type:UNKNOWN
13:22:36 lon [ADT]:|1|3| Numb. Plan:UNKNOWN
13:22:36 lon [ADT]:|1|3| Ph.# 0013123963808
13:22:36 lon [ADT]:ISDN|1|3|Call to ATLAS:'0013123963808'.
13:22:36 lon [ADT]:|1|3|==========
13:22:36 lon [ADT]:|1|3|Sent = Sapi:00 C/R:C Tei:00
13:22:36 lon [ADT]:|1|3| Ctl:INFO Ns:36 Nr:45
13:22:36 lon [ADT]:|1|3| Prot:08 CRL:2 CRV:8017
13:22:36 lon [ADT]:|1|3| M - 02 CALL_PROC
13:22:36 lon [ADT]:|1|3| IE - 18 CHANNEL ID Len=3
13:22:36 lon [ADT]:|1|3| A9 Primary Rate
13:22:36 lon [ADT]:|1|3| Intfc ID:IMPLICIT
13:22:36 lon [ADT]:|1|3| Pref/Excl:EXCLUSIVE
13:22:36 lon [ADT]:|1|3| D-Chan Indicated:NO
13:22:36 lon [ADT]:|1|3| Chan. Sel:FOLLOWS
13:22:36 lon [ADT]:|1|3| 83 Numb/Map:NUMBER
13:22:36 lon [ADT]:|1|3| 9f Channel:31
|1|2| is the PRI to BT
13:22:36 lon [ADT]:|1|2|==========
13:22:36 lon [ADT]:|1|2|Sent = Sapi:00 C/R:R Tei:00
13:22:36 lon [ADT]:|1|2| Ctl:INFO Ns:21 Nr:24
13:22:36 lon [ADT]:|1|2| Prot:08 CRL:2 CRV:0017
13:22:36 lon [ADT]:|1|2| M - 05 SETUP
13:22:36 lon [ADT]:|1|2| IE - A1 SENDING COMPLETE Len=0
13:22:36 lon [ADT]:|1|2| IE - 04 BEARER CAPABILITY Len=3
13:22:36 lon [ADT]:|1|2| 80 Xfer Cap.:SPEECH
13:22:36 lon [ADT]:|1|2| 90 Xfer Rate:64k
13:22:36 lon [ADT]:|1|2| A3 Layer 1:G.711 A-Law
13:22:36 lon [ADT]:|1|2| IE - 18 CHANNEL ID Len=3
13:22:36 lon [ADT]:|1|2| A1 Primary Rate
13:22:36 lon [ADT]:|1|2| Intfc ID:IMPLICIT
13:22:36 lon [ADT]:|1|2| Pref/Excl:PREFERRED
13:22:36 lon [ADT]:|1|2| D-Chan Indicated:NO
13:22:36 lon [ADT]:|1|2| Chan. Sel:FOLLOWS
13:22:36 lon [ADT]:|1|2| 83 Numb/Map:NUMBER
13:22:36 lon [ADT]:|1|2| 9f Channel:31
13:22:36 lon [ADT]:|1|2| IE - 6C CALLING PARTY # Len=8
13:22:36 lon [ADT]:|1|2| 00 Numb. Type:UNKNOWN
13:22:36 lon [ADT]:|1|2| Numb. Plan:UNKNOWN
13:22:36 lon [ADT]:|1|2| A1 Presentation:RESTRICTED
13:22:36 lon [ADT]:|1|2| Ph.# 504955
13:22:36 lon [ADT]:|1|2| IE - 70 CALLED PARTY # Len=14
13:22:36 lon [ADT]:|1|2| 80 Numb. Type:UNKNOWN
13:22:36 lon [ADT]:|1|2| Numb. Plan:UNKNOWN
13:22:36 lon [ADT]:|1|2| Ph.# 0013123963808
13:22:36 lon [ADT]:ISDN|1|2|Dialing '0013123963808' from '504955'.
13:22:36 lon [ADT]:Switchboard|1|3|0013123963808 Pri. accepted:
slot 1, port 2
13:22:37 lon [ADT]:|1|2|==========
13:22:37 lon [ADT]:|1|2|Recd = Sapi:00 C/R:C Tei:00
13:22:37 lon [ADT]:|1|2| Ctl:INFO Ns:24 Nr:22
13:22:37 lon [ADT]:|1|2| Prot:08 CRL:2 CRV:8017
13:22:37 lon [ADT]:|1|2| M - 02 CALL_PROC
13:22:37 lon [ADT]:|1|2| IE - 18 CHANNEL ID Len=3
13:22:37 lon [ADT]:|1|2| A9 Primary Rate
13:22:37 lon [ADT]:|1|2| Intfc ID:IMPLICIT
13:22:37 lon [ADT]:|1|2| Pref/Excl:EXCLUSIVE
13:22:37 lon [ADT]:|1|2| D-Chan Indicated:NO
13:22:37 lon [ADT]:|1|2| Chan. Sel:FOLLOWS
13:22:37 lon [ADT]:|1|2| 83 Numb/Map:NUMBER
13:22:37 lon [ADT]:|1|2| 81 Channel:1
13:22:37 lon [ADT]:ISDN|1|2|Gate opened to name by Proceeding Msg.
13:22:40 lon [ADT]:|1|2|==========
13:22:40 lon [ADT]:|1|2|Recd = Sapi:00 C/R:C Tei:00
13:22:40 lon [ADT]:|1|2| Ctl:INFO Ns:25 Nr:22
13:22:40 lon [ADT]:|1|2| Prot:08 CRL:2 CRV:8017
13:22:40 lon [ADT]:|1|2| M - 01 ALERTING
13:22:40 lon [ADT]:|1|2| IE - 1E PROGRESS INDICATOR Len=2
13:22:40 lon [ADT]:|1|2| 84 Location:RLN
13:22:40 lon [ADT]:|1|2| 82 Description:DEST. NOT ISDN
13:22:40 lon [ADT]:ISDN|1|2|Call to '0013123963808' ringing.
13:22:40 lon [ADT]:|1|3|==========
13:22:40 lon [ADT]:|1|3|Sent = Sapi:00 C/R:C Tei:00
13:22:40 lon [ADT]:|1|3| Ctl:INFO Ns:37 Nr:45
13:22:40 lon [ADT]:|1|3| Prot:08 CRL:2 CRV:8017
13:22:40 lon [ADT]:|1|3| M - 01 ALERTING
13:22:42 lon [ADT]:|1|2|==========
So up to now this is all strictly D-channel ISDN signalling; it's not
until the CONNECT that we get a audio path. During this ALERTING
phase the person who made the outbound call is hearing a buzz rather
than "RING RING" cadence.
13:22:42 lon [ADT]:|1|2|Recd = Sapi:00 C/R:C Tei:00
13:22:42 lon [ADT]:|1|2| Ctl:INFO Ns:26 Nr:22
13:22:42 lon [ADT]:|1|2| Prot:08 CRL:2 CRV:8017
13:22:42 lon [ADT]:|1|2| M - 07 CONNECT
13:22:42 lon [ADT]:ISDN|1|2|Call to '0013123963808' connected.
13:22:42 lon [ADT]:ISDN|1|3|Call to '0013123963808' connected.
13:22:42 lon [ADT]:|1|2|==========
13:22:42 lon [ADT]:|1|2|Sent = Sapi:00 C/R:R Tei:00
13:22:42 lon [ADT]:|1|2| Ctl:INFO Ns:22 Nr:27
13:22:42 lon [ADT]:|1|2| Prot:08 CRL:2 CRV:0017
13:22:42 lon [ADT]:|1|2| M - 0F CONNECT_ACK
13:22:42 lon [ADT]:|1|3|==========
13:22:42 lon [ADT]:|1|3|Sent = Sapi:00 C/R:C Tei:00
13:22:42 lon [ADT]:|1|3| Ctl:INFO Ns:38 Nr:45
13:22:42 lon [ADT]:|1|3| Prot:08 CRL:2 CRV:8017
13:22:42 lon [ADT]:|1|3| M - 07 CONNECT
13:22:42 lon [ADT]:|1|3|==========
13:22:42 lon [ADT]:|1|3|Recd = Sapi:00 C/R:R Tei:00
13:22:42 lon [ADT]:|1|3| Ctl:INFO Ns:45 Nr:39
13:22:42 lon [ADT]:|1|3| Prot:08 CRL:2 CRV:0017
13:22:42 lon [ADT]:|1|3| M - 0F CONNECT_ACK
And now there's a bi-directional audio path which has been ACKed by
both the Adtran and the Cisco.
Adtran TAC is saying that it's not them. Thoughts?
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