Occasional Got SIP response 400 "Bad Request" back

Discussion in 'IP Phones' started by mastermindpro, Apr 7, 2010.

  1. mastermindpro

    May 28, 2009
    Likes Received:
    I have a few Polycom 650's with the latest public firmware and bootrom that occasionally seem to reject calls. They are all located behind a m0n0wall firewall with a SIP proxy enabled and configured. The Elastix box is in a datacenter. Once in a while, when a call hits a ring group, I'll get these responses back from all phones in the ring group:

    Got SIP response 400 "Bad Request" back from xxx.xxx.xxx.xxx

    This only happens occasionally, maybe 1 in 20 calls. Would you suspect a problem with the proxy or the phones themselves? The phones usually ring once or maybe twice before this response is received by the Elastix box.

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