[asterisk-users] Asterisk Dropping Calls

Richard Young Richard.Young at intrintech.com
Mon Sep 24 06:29:40 CDT 2007 

Hello, 

I am having an issue whereby calls are being dropped randomly. I have an
ISDN 30 E1 line going into a Wildcard TE220 (4th Gen). My Asterisk
install is based on Trixbox 2.0. However, I have updated the source code
to the following. The Asterisk release is asterisk-1.2.20. Zaptel
release is zaptel-1.2.18. And libpri release is libpri-1.2.4. 

I have include an extract from the Asterisk log file below that shows
SIP/781 dropping a call when bridged to Zap/3-1. I have also included my
zaptel and zapata conf files. 

I have researched the various messages displayed in the log file but
couldn't see anything that would point definitively to why calls are
being dropped. 

Has anyone experienced anything similar or can anyone give me a few
ideas on where to start looking for the cause of the drop-outs? 

Many thanks.

 

/var/log/asterisk/full:

 

Channel 0/3, span 1 got hangup request, cause 16 
Sep 18 16:01:03 DEBUG[32377] channel.c: Didn't get a frame from channel:
Zap/3-1 
Sep 18 16:01:03 DEBUG[32377] channel.c: Bridge stops bridging channels
SIP/781-b6e1b590 and Zap/3-1 
Sep 18 16:01:03 DEBUG[32377] chan_zap.c: Set option AUDIO MODE, value:
ON(1) on Zap/3-1 
Sep 18 16:01:03 DEBUG[32377] chan_zap.c: Hangup: channel: 3 index = 0,
normal = 15, callwait = -1, thirdcall = -1 
Sep 18 16:01:03 DEBUG[32377] chan_zap.c: Not yet hungup...  Calling
hangup once with icause, and clearing call 
Sep 18 16:01:03 DEBUG[32377] chan_zap.c: disabled echo cancellation on
channel 3 
Sep 18 16:01:03 DEBUG[32377] chan_zap.c: Set option TDD MODE, value:
OFF(0) on Zap/3-1 
Sep 18 16:01:03 DEBUG[32377] chan_zap.c: Updated conferencing on 3, with
0 conference users 
Sep 18 16:01:03 DEBUG[32377] chan_zap.c: Set option AUDIO MODE, value:
OFF(0) on Zap/3-1 
Sep 18 16:01:03 DEBUG[32377] chan_zap.c: disabled echo cancellation on
channel 3 
Sep 18 16:01:03 VERBOSE[32377] logger.c:     -- Hungup 'Zap/3-1' 
Sep 18 16:01:03 DEBUG[32377] app_dial.c: Exiting with DIALSTATUS=ANSWER.

Sep 18 16:01:03 VERBOSE[32377] logger.c:   == Spawn extension
(macro-dialout-trunk, s, 20) exited non-zero on 'SIP/781-b6e1b590' in
macro 'dialout-trunk' 
Sep 18 16:01:03 VERBOSE[32377] logger.c:   == Spawn extension
(macro-dialout-trunk, s, 20) exited non-zero on 'SIP/781-b6e1b590' 
Sep 18 16:01:03 VERBOSE[32377] logger.c:     -- Executing
Macro("SIP/781-b6e1b590", "hangupcall") in new stack 
Sep 18 16:01:03 VERBOSE[32377] logger.c:     -- Executing
ResetCDR("SIP/781-b6e1b590", "w") in new stack 
Sep 18 16:01:03 DEBUG[32377] cdr_addon_mysql.c: cdr_mysql: inserting a
CDR record. 
Sep 18 16:01:03 DEBUG[32377] cdr_addon_mysql.c: cdr_mysql: SQL command
as follows: INSERT INTO cdr
(calldate,clid,src,dst,dcontext,channel,dstchannel,lastapp,lastdata,dura
tion,billsec,disposition,amaflags,accountcode) VALUES ('2007-09-18
15:58:30','02072900400','02072900400','08704440730','from-internal',
'SIP/781-b6e1b590','Zap/3-1','ResetCDR','w',153,150,'ANSWERED',3,'') 
Sep 18 16:01:03 DEBUG[32377] app_macro.c: Executed application: ResetCDR

Sep 18 16:01:03 VERBOSE[32377] logger.c:     -- Executing
NoCDR("SIP/781-b6e1b590", "") in new stack 
Sep 18 16:01:03 NOTICE[32377] cdr.c: CDR on channel 'SIP/781-b6e1b590'
not posted 
Sep 18 16:01:03 NOTICE[32377] cdr.c: CDR on channel 'SIP/781-b6e1b590'
lacks end 
Sep 18 16:01:03 DEBUG[32377] app_macro.c: Executed application: NoCDR 
Sep 18 16:01:03 DEBUG[32377] pbx.c: Expression result is '1' 
Sep 18 16:01:03 VERBOSE[32377] logger.c:     -- Executing
GotoIf("SIP/781-b6e1b590", "1?skiprg") in new stack 
Sep 18 16:01:03 VERBOSE[32377] logger.c:     -- Goto
(macro-hangupcall,s,6) 
Sep 18 16:01:03 DEBUG[32377] app_macro.c: Executed application: GotoIf 
Sep 18 16:01:03 DEBUG[32377] pbx.c: Expression result is '1' 
Sep 18 16:01:03 VERBOSE[32377] logger.c:     -- Executing
GotoIf("SIP/781-b6e1b590", "1?theend") in new stack 
Sep 18 16:01:03 VERBOSE[32377] logger.c:     -- Goto
(macro-hangupcall,s,9) 
Sep 18 16:01:03 DEBUG[32377] app_macro.c: Executed application: GotoIf 
Sep 18 16:01:03 VERBOSE[32377] logger.c:     -- Executing
Wait("SIP/781-b6e1b590", "5") in new stack 
Sep 18 16:01:03 DEBUG[13856] chan_sip.c: Setting NAT on RTP to 524288 
Sep 18 16:01:03 DEBUG[13856] chan_sip.c: Stopping retransmission on
'3c27fa213827-z22macsy3qgz at snom360-0004132394E9' of Response 1: Match
Found 
Sep 18 16:01:03 DEBUG[13856] chan_sip.c: Setting NAT on RTP to 524288

 

My zaptel.conf is as follows:

 

# Autogenerated by /usr/local/sbin/genzaptelconf -- do not hand edit 
# Zaptel Configuration File 
# 
# This file is parsed by the Zaptel Configurator, ztcfg 
# 

# It must be in the module loading order 


# Span 1: WCT1/0 "Wildcard TE22xP Card 0" 
# channel 1, WCT1, unhandled for now 
# channel 2, WCT1, unhandled for now 
# channel 3, WCT1, unhandled for now 
# channel 4, WCT1, unhandled for now 
# channel 5, WCT1, unhandled for now 
# channel 6, WCT1, unhandled for now 
# channel 7, WCT1, unhandled for now 
# channel 8, WCT1, unhandled for now 
# channel 9, WCT1, unhandled for now 
# channel 10, WCT1, unhandled for now 
# channel 11, WCT1, unhandled for now 
# channel 12, WCT1, unhandled for now 
# channel 13, WCT1, unhandled for now 
# channel 14, WCT1, unhandled for now 
# channel 15, WCT1, unhandled for now 
# channel 16, WCT1, unhandled for now 
# channel 17, WCT1, unhandled for now 
# channel 18, WCT1, unhandled for now 
# channel 19, WCT1, unhandled for now 
# channel 20, WCT1, unhandled for now 
# channel 21, WCT1, unhandled for now 
# channel 22, WCT1, unhandled for now 
# channel 23, WCT1, unhandled for now 
# channel 24, WCT1, unhandled for now 
# channel 25, WCT1, unhandled for now 
# channel 26, WCT1, unhandled for now 
# channel 27, WCT1, unhandled for now 
# channel 28, WCT1, unhandled for now 
# channel 29, WCT1, unhandled for now 
# channel 30, WCT1, unhandled for now 
# channel 31, WCT1, unhandled for now 

# Global data 

loadzone   = uk 
defaultzone     = uk 

span=1,1,0,ccs,hdb3,crc4 
bchan=1-15,17-31 
dchan=16

 

My zapata.conf file looks like this:

 

; 
; Zapata telephony interface 
; 
; Configuration file 

[trunkgroups] 

[channels] 
language=en 
usecallerid=yes 
hidecallerid=no 
callwaiting=no 
usecallingpres=yes 
callwaitingcallerid=yes 
threewaycalling=yes 
transfer=yes 
cancallforward=yes 
callreturn=yes 
echocancel=yes 
echocancelwhenbridged=yes 
echotraining=800 
musiconhold=default 
rxgain=0.0 
txgain=0.0 
immediate=no 
overlapdial=yes 
callgroup=1 
pickupgroup=1 
pridialplan=unknown 
faxdetect=incoming 
prilocaldialplan=unknown 

group=0 
context=from-zaptel 
callerid=asreceived 
switchtype = euroisdn 
signalling = pri_cpe 
channel => 1-15,17-31 

;Include genzaptelconf configs 
;#include zapata-auto.conf 

;Include AMP configs 
;#include zapata_additional.conf
 
 
Kind Regards,
 
Richard Young
Intrintech Limited
Richard.Young at intrintech.com
111 Cannon Street
London
EC4N 5AR
Phone: 0845 644 2918
 
 
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