[asterisk-users] Calls drop after 20 seconds

[Alejandro Recarey]

Hi all,

This issue is giving me a lot of grief with my customers. I have 5
asterisk servers running in production, each one with almost 70
simultaneous calls at peak hour. Most of my customers complain that
their calls drop after 20 seconds or so.

After running through my cdr's, I see that the number of 20 second
calls is MUCH larger than any other number. (see below)

billsec	count(*)
1	924
2	841
3	725
4	812
5	779
6	681
7	644
8	630
9	613
10	515
11	522
12	516
13	557
14	527
15	507
16	457
17	456
18	467
19	424
20	1644
21	365
22	382
23	353
24	382
25	379
26	370
27	350
28	337
29	302
30	291
>30  lots


I am running Asterisk 1.6.1.14 on Debian Lenny. My servers are Dell
Power Edge 1950. I use canreinvite=no, and all of my servers are on
public IP's. All of my customers use Grandstream GXW4004 telephony
adapters.

It is a hard issue to debug because it does not happen always. I will
try to obtain a sip trace from a dropped call, but until then, any
pointers, opinions or even guesses would be much appreciated!!

Thanks in advance,

Alex