PJSIP endpoints become unavailable for a few seconds

1

It happens quite often that an endpoint becomes unavailable, and unreachable by other endpoints. Sometimes it displays this message:

Endpoint 7001 is now Unreachable

But sometimes it becomes unreachable without saying anything. And they become unavailable independently from each other, if one is available, the other one is available even if they are connecting from the same network. Also, sometimes it happens even during the call, meaning that when one of them hangs up, the server does not notice it.

I tried to check the log, but there is so much information that I don’t know what to check. I desperately need your help here, please.

I don’t know if the problem is with network or I am using wrong parameters in the configuration files. Here are some details about my asterisk server:

  • AsteriskNow distribution with Asterisk 13.7.0.
  • Server is running on a public ip
  • Clients are behind NAT

pjsip.endpoint_custom.conf

    [7001]
    type=endpoint
    aors=7001
    auth=7001-auth
    allow=ulaw,alaw,gsm,g726,g722,g729,g723,slin
    context=from-internal
    callerid=User
    dtmf_mode=rfc4733
    transport=0.0.0.0-udp
    use_avpf=no
    ice_support=no
    media_use_received_transport=no
    trust_id_inbound=yes
    send_pai=yes
    rtp_symmetric=yes
    rewrite_contact=yes
    message_context=astsms

pjsip.aor_custom.conf

   [7001]
   type=aor
   mailboxes=7001@device
   max_contacts=1
   remove_existing=yes

Thank you so much!

2

The act of determining whether something is available or not involves sending a SIP OPTIONS request to it and seeing if we get a response. If we get no response then it’s unavailable. This only impacts whether we can call them or not - it does not have any impact on an active call. Since you’ve mentioned that if this happens during an active call and if they hang up that we don’t get a message… then it sounds like something network level outside of Asterisk.