Hi, got a Sangoma A200 with a bunch of extension cards and having real problems getting it to deal with a normal single BT line Symptoms are that incoming calls are fine. Outgoing calls ring the far end, BUT asterisk never sees that the call is answered (ie no message in the logs files saying so), as a result the remove end can hear the PBX side talking, but there is no audio back from the remote side to us. When we hangup the log files show messages thave suggest it thinks the line is still ringing Comparing with another line which works fine (this is a BT multi-line system with what they call "PBX signalling" on it) I see that as soon as the remote end answers then asterisk gets a log message stating the same and audio is fine on this line Have now spent nearly 4 months trying to get the signalling sorted on this line. Most recently we requested "dual signalling" on the line - the end result is now that outbound calls work and asterisk reports that the phone answers, however, when you hangup the call then asterisk obviously gets a bunch of extra line reversals and things there is an immediate incoming call on the back of that outgoing call... Please - any suggestions on how to configure a Sangoma card for use with a normal BT single line? Thanks Ed W
On Mon, 6 Apr 2009, Ed W wrote:> Hi, got a Sangoma A200 with a bunch of extension cards and having real > problems getting it to deal with a normal single BT line > > Symptoms are that incoming calls are fine. Outgoing calls ring the far > end, BUT asterisk never sees that the call is answered (ie no message in > the logs files saying so), as a result the remove end can hear the PBX > side talking, but there is no audio back from the remote side to us. > When we hangup the log files show messages thave suggest it thinks the > line is still ringingI've not used Sangoma analogue cards - just digium and OpenVox. Never really had an issue though. For analogue lines, Asterisk assumes the line is "open" or answered as soon as the last DTMF digit is sent down the line - it's got no real way of knowing when the far-end answers. (At least with normal BT lines I've used) So I'd be wondering if there isn't something else going on? One way audio is often NAT issues, but it's working with incoming calls for you, but not outgoing - which seems odd..> Comparing with another line which works fine (this is a BT multi-line > system with what they call "PBX signalling" on it) I see that as soon as > the remote end answers then asterisk gets a log message stating the same > and audio is fine on this lineI've never asked BT for anything special on lines - I wasn't aware they could do much on analogue lines... (I think you can tell them the lines are for PBX use, but I've never had any issues)> Have now spent nearly 4 months trying to get the signalling sorted on > this line. Most recently we requested "dual signalling" on the line - > the end result is now that outbound calls work and asterisk reports that > the phone answers, however, when you hangup the call then asterisk > obviously gets a bunch of extra line reversals and things there is an > immediate incoming call on the back of that outgoing call... > > Please - any suggestions on how to configure a Sangoma card for use with > a normal BT single line?Bit of a long-shot, but try an OpenVox card as a cheap test of alternative technology? Gordon
Ed W wrote:> Hi, got a Sangoma A200 with a bunch of extension cards and having real > problems getting it to deal with a normal single BT line > > Symptoms are that incoming calls are fine. Outgoing calls ring the far > end, BUT asterisk never sees that the call is answered (ie no message in > the logs files saying so), as a result the remove end can hear the PBX > side talking, but there is no audio back from the remote side to us. > When we hangup the log files show messages thave suggest it thinks the > line is still ringing > > Comparing with another line which works fine (this is a BT multi-line > system with what they call "PBX signalling" on it) I see that as soon as > the remote end answers then asterisk gets a log message stating the same > and audio is fine on this line > > > Have now spent nearly 4 months trying to get the signalling sorted on > this line. Most recently we requested "dual signalling" on the line - > the end result is now that outbound calls work and asterisk reports that > the phone answers, however, when you hangup the call then asterisk > obviously gets a bunch of extra line reversals and things there is an > immediate incoming call on the back of that outgoing call... > > Please - any suggestions on how to configure a Sangoma card for use with > a normal BT single line? > > Thanks > > Ed WHi Ed This is from a system with a Sangoma A200 on a Virgin/Telewest analogue line, haven't had a problem in 2 years /etc/wanpipe/wanpipe1.conf [devices] wanpipe1 = WAN_AFT_ANALOG, Comment [interfaces] w1g1 = wanpipe1, , TDM_VOICE, Comment [wanpipe1] CARD_TYPE = AFT S514CPU = A CommPort = PRI AUTO_PCISLOT = NO PCISLOT = 11 PCIBUS = 0 FE_MEDIA = FXO/FXS TDMV_LAW = MULAW TDMV_OPERMODE = FCC RM_NETWORK_SYNC = NO MTU = 1500 UDPPORT = 9000 TTL = 255 IGNORE_FRONT_END = NO TDMV_SPAN = 1 [w1g1] ACTIVE_CH = ALL TDMV_ECHO_OFF = NO TDMV_HWEC = NO /etc/zaptel.conf loadzone=us defaultzone=us #Sangoma A200 [slot:11 bus:0 span:1] fxsks=3 fxsks=4 /etc/asterisk/zapata.conf [trunkgroups] [channels] context=default usecallerid=yes hidecallerid=no callwaiting=yes usecallingpres=yes callwaitingcallerid=yes threewaycalling=yes transfer=yes canpark=yes cancallforward=yes callreturn=yes echocancel=yes echocancelwhenbridged=yes relaxdtmf=yes rxgain=4.0 txgain=2.0 group=1 callgroup=1 pickupgroup=1 immediate=no ;Sangoma A200 [slot:11 bus:0 span:1] context=from-zaptel group=0 signalling = fxs_ks channel => 3 #context=from-zaptel #group=0 #signalling = fxs_ks #channel => 4 As you can see only channel 3 is in use and yes I know zaptel.conf says loadzone=us defaultzone=us but it appeasr to make no difference with this card. Hope this helps Bails -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.
2009/4/6 Ed W <lists at wildgooses.com>:> Hi, got a Sangoma A200 with a bunch of extension cards and having real > problems getting it to deal with a normal single BT lineThe A200 is a great card, and we use it quite a lot in the UK. Mostly we use the A200D for the echo cancellation.> Symptoms are that incoming calls are fine. ?Outgoing calls ring the far > end, BUT asterisk never sees that the call is answered (ie no message in > the logs files saying so), as a result the remove end can hear the PBX > side talking, but there is no audio back from the remote side to us. > When we hangup the log files show messages thave suggest it thinks the > line is still ringingI think someone else already said that Asterisk sends the number using DTMF, and then just opens up the audio channel - There is no answer detection involved beyond the user hearing the ringtone stop and the callee talking :)> Comparing with another line which works fine (this is a BT multi-line > system with what they call "PBX signalling" on it) I see that as soon as > the remote end answers then asterisk gets a log message stating the same > and audio is fine on this lineWe have found that using "Residential" settings as a starting point, and then asking for "Disconnect clear time" to be set to 800ms is all that is needed. That one setting allows the hangup to be detected reliably. We do also use the dialtone detection of Asterisk to be sure we're dialling on a line that is ready to take a call.> Have now spent nearly 4 months trying to get the signalling sorted on > this line. ?Most recently we requested "dual signalling" on the line - > the end result is now that outbound calls work and asterisk reports that > the phone answers, however, when you hangup the call then asterisk > obviously gets a bunch of extra line reversals and things there is an > immediate incoming call on the back of that outgoing call...I would turn off any line reversal detection - We found it horribly unreliable on BT's lines.> Please - any suggestions on how to configure a Sangoma card for use with > a normal BT single line?Fundamentally, BT suffer from "backward compatability with the GPO" syndrome, which basically means they do a load of stuff differently from the rest of the world. - Only the caller can ever hang up a call involving an analogue party. - Many line timings such as DCT are different and so forth Hope this is helpful... Steve