Hello,
When I dial a number, and receiver picks up the phone, call drops after 1-2 seconds.
Asterisk CLI output:
Jun 15 13:41:05 WARNING[1139]: chan_zap.c:6517 handle_init_event: Detected alarm on channel 1: Red Alarm
Jun 15 13:41:05 WARNING[1138]: chan_zap.c:2438 pri_find_dchan: No D-channels available! Using Primary channel 16 as D-channel anyway!
Thanks.
It is urgent for me. Does anyone have a solution?
post your zap and dialplan configurations
there is a problem with T1/E1 link between you and your TelCo on the physical layer.
Some theory:
A red alarm that can occur after a LFA (loss of frame alignment) has existed for 2.5 seconds. It is cleared after the LFA has been clear for at least one second.
The LFA condition, also called an out-of-frame (OOF) condition occur when there are errors in the incoming framing pattern.
zapata.conf
[channels]
context=default
switchtype=euroisdn
pridialplan=national
signalling=pri_cpe
usecallerid=yes
hidecallerid=no
callwaiting=yes
callwaitingcallerid=yes
threewaycalling=yes
transfer=yes
cancallforward=yes
;echocancel=yes
rxgain=0.0
txgain=0.0
busydetect=no
group=1
callgroup=1
pickupgroup=1
resetinterval=never
immediate=no
callprogress=no
channel => 1-15
channel => 17-31
zaptel.conf
loadzone = uk
defaultzone=uk
span=1,1,0,ccs,hdb3
bchan=1-15,17-31
dchan=16
Is this in the UK as the loadzone says?
If so what are you connecting to ?
and finally is this for you or a customer ?
Is this in the UK as the loadzone says? - Yes UK
and finally is this for you or a customer ? - Customer facing such problem
OK This is a simple one.
You need to look at what you have setup and what works in the UK.
Ian
You forgot to answer one more question - what are you connecting to?
Who is using the Asterisk - you or your customer? In either case - what is the Asterisk’s peer?
At this level country options are not relevant, as soon as you have purely point-to-point connection problem between 2 devices.
The country is very important, As it will decide what the zaptel.conf will need setting up with respect to framing etc.
Ian
OK, it just need to be the same on the both sides. D-channel is point-to-point, right?
As I sad earlier - it’s mainly physical layer problem with clocking and framing and also may be L3-related - ISDN net/user, etc…
Yes. It looks like framing and clocking issue.