Extensions unregistering after about 10 seconds

Asterisk Asterisk Support
1

Asterisk 13.6.0,

We have a number 4 chan_sip extensions.

0101 Xindows Xlite
0103 Zoiper for Android
0100 Cisco 7960 SIP phone
0300 Another SIP phone similar to the cisco one

if i run asterisk -vvvvvvvv

I see every 60 seconds the following:

-- Registered SIP '0100' at 180.216.8.79:1035

If I run sip show peers right after i see the above messages, i see

0100/0100 180.216.8.79 D No No A 1035 OK (248 ms)
0101/0101 180.216.8.79 D No No A 64429 OK (74 ms)
0103/0103 180.216.8.79 D Yes Yes A 64787 Unmonitored
0300/0300 (Unspecified) D Yes Yes A 0 Unmonitored

Then if I run it again, every second, i can see that after about 10 seconds the 0100 shows as (Unspecfied) and Port 0

– Registered SIP ‘0300’ at 141.136.148.156:5060
sip*CLI> sip show peers
Name/username Host Dyn Forcerport Comedia ACL Port Status Description
0100/0100 (Unspecified) D No No A 0 OK (248 ms)
0101/0101 180.216.8.79 D No No A 64429 OK (74 ms)
0103/0103 180.216.8.79 D Yes Yes A 64787 Unmonitored
0300/0300 141.136.148.156 D Yes Yes A 5060 Unmonitored
Telecube/1030679 103.193.167.41 Yes Yes 5060 Unmonitored

If i try to call the extensions while the Host is in unspecified status (about 40 seconds every minute) it doesn’t connect, but if i call right after seing “-- Registered SIP ‘0100’ at 180.216.8.79:1035” then it works.

I have tried setting qualify=no on the 0100 extension but the problem persist.

Any ideas as to why asterisk is unregistering these extensions and how to avoid it?

Thanks

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