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Nortel 1535 dropped calls -Registrations Failed- randomly during calls

Discussion in 'Endpoints' started by autorenova, Feb 9, 2012.

  1. autorenova New Member

    I have several different Nortel 1535's that I purchased new a while back. I have been using the phones for a while but now that they are getting used more often I have been searching how to resolve the issues that plague these handsets. I have several different endpoints connecting to my same server that are not having the same issue as the Nortel's. I have searched the forums and cannot seem to find a solutions to the following issues:

    Primary Issue:
    Registrations Failed error displays on the screen mid call and the call drops. When this occurs I can usually hear an audible crackle. This happens at random times on calls. It can happen in the first couple of minutes or it can be 30+ minutes into a call but I would say that 30% of calls end up dropping on the Nortel 1535. I have been trying to watch the sip debug but have not found anything that stands out. Here are messages that display at the time the call drops: (Domains changed for privacy)
    =============================================

    Scheduling destruction of SIP dialog '313598-cf01a8c0-13c4-45026-0-131b8278-0' in 32000 ms (Method: REGISTER)

    <--- SIP read from UDP:174.52.222.222:1027 --->
    REGISTER sip:myserverdomain.com SIP/2.0
    From: "Office"<sip:1001@myserverdomain.com>;tag=2f6558-cf01a8c0-13c4-45026-0-6bbbfaed-0
    To: "Office"<sip:1001@myserverdomain.com>
    Call-ID: 313598-cf01a8c0-13c4-45026-0-131b8278-0
    CSeq: 102 REGISTER
    Via: SIP/2.0/UDP 192.168.1.207:5060;rport;branch=z9hG4bK-98c-254b46-bd3f507
    Max-Forwards: 70
    Supported: replaces
    User-Agent: Nortel IP Phone 1535 (0.2.50.0905)
    Contact: <sip:1001@192.168.1.207:5060>;expires=60;description="Connected"
    Expires: 60
    Proxy-Require: com.nortelnetworks.firewall
    Content-Length: 0

    <------------->
    --- (13 headers 0 lines) ---
    Sending to 174.52.222.222:1027 (NAT)


    <--- Transmitting (NAT) to 174.52.222.222:1027 --->
    SIP/2.0 401 Unauthorized
    Via: SIP/2.0/UDP 192.168.1.207:5060;branch=z9hG4bK-0-3a0-6f83c0ce;received=174.52.222.222;rport=1027
    From: "Office"<sip:1001@myserverdomain.com>;tag=2f6558-cf01a8c0-13c4-45026-0-3f6ef439-0
    To: "Office"<sip:1001@myserverdomain.com>;tag=as0615c2ff
    Call-ID: 313598-cf01a8c0-13c4-45026-0-e3a0a94-0
    CSeq: 1 REGISTER
    Server: FPBX-2.8.1(1.8.7.1)
    Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH
    Supported: replaces, timer
    WWW-Authenticate: Digest algorithm=MD5, realm="asterisk", nonce="13c39bff"
    Content-Length: 0


    <------------>
    Scheduling destruction of SIP dialog '313598-cf01a8c0-13c4-45026-0-e3a0a94-0' in 32000 ms (Method: REGISTER)

    <--- SIP read from UDP:174.52.222.222:1027 --->
    REGISTER sip:myserverdomain.com SIP/2.0
    From: "Office"<sip:1001@myserverdomain.com>;tag=2f6558-cf01a8c0-13c4-45026-0-3f6ef439-0
    To: "Office"<sip:1001@myserverdomain.com>
    Call-ID: 313598-cf01a8c0-13c4-45026-0-e3a0a94-0
    CSeq: 2 REGISTER
    Via: SIP/2.0/UDP 192.168.1.207:5060;rport;branch=z9hG4bK-1-3f4-2f6fcd4c
    Max-Forwards: 70
    Supported: replaces
    User-Agent: Nortel IP Phone 1535 (0.2.50.0905)
    Contact: <sip:1001@192.168.1.207:5060>;expires=60;description="Login"
    Expires: 60
    Authorization: Digest username="1001",realm="asterisk",nonce="13c39bff",uri="sip:myserverdomain.com",response="9cdbde759fa3f545fba335b052f865f9",algorithm=MD5
    Proxy-Require: com.nortelnetworks.firewall
    Content-Length: 0

    ===============================================

    Does anyone know what "Proxy-Require: com.nortelnetworks.firewall" is for and could it be causing problems.
  2. autorenova New Member

    Not sure if this question will get noticed in my original post so I will post it again but does anyone know what "Proxy-Require: com.nortelnetworks.firewall" is for and could it be causing problems? Also if there is anything that I can post will help shed some light on why the call is dropping please let me know.
  3. dad311 Guru

    Sometimes the only way I can register my 1535 is to power cycle. Also, if i reboot my router, the phone will not auto re-register. Real pain.
  4. autorenova New Member

    I don't have any problem getting the phone to register. When the error message "Registrations Failed" is displayed the phone actually does not de-register and I can make a call immediately after without having to power cycle or going into Menu-->Settings-->Voip Settings-->Registration-->Register. In fact most time Asterisk does not realize that my Nortel 1535 has dropped off of the call for another 30-45 seconds. I guess that I should have made that a little clearer in my original message.
  5. autorenova New Member

    Still dropping calls....

    It seems odd that I would be the only one that has seen this issue. I currently have 3 Nortel 1535 phones in use and all three of the phones have this same issue. I even tried running one of the 1535 phones off of an Atcom IP4G (Asterisk appliance that runs Asterisk 1.4) to see if it was just my active server causing the issue but it still happened. If I am the only one having this same issue it at least gives me hope that there is something that I can change in my configuration to stop the dropped calls. The Nortel's seem to drop the call sooner on inbound calls. I have several other endpoints on the same server that are not having issues (Obi110, S101I, Linksys SPA941, Cisco 7960). Any suggestions on how or what to look for in order to troubleshoot this would be greatly appreciated.

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