Anyone seen these error messages before and can tell me what is wrong with my server?
Aug 13 12:11:13 chan_sip.c WARNING Maximum retries exceeded on transmission 4fc6191a51312b0c056cf69c27895575@192.168.168.1 for seqno 102 (Critical Request)
Aug 13 12:11:13 chan_sip.c WARNING Hanging up call 4fc6191a51312b0c056cf69c27895575@192.168.168.1 - no reply to our critical packet.
Aug 13 12:11:16 chan_sip.c WARNING Maximum retries exceeded on transmission 6c86eaba241e01e20d9bf1e639fb5f5b@192.168.168.1 for seqno 102 (Critical Request)
Aug 13 12:11:16 chan_sip.c WARNING Hanging up call 6c86eaba241e01e20d9bf1e639fb5f5b@192.168.168.1 - no reply to our critical packet.
Aug 13 12:11:17 chan_sip.c WARNING Maximum retries exceeded on transmission 7dfcd745770fb3fb143c0d1211778164@192.168.168.1 for seqno 102 (Critical Request)
Aug 13 12:11:17 chan_sip.c WARNING Hanging up call 7dfcd745770fb3fb143c0d1211778164@192.168.168.1 - no reply to our critical packet.
Aug 13 12:11:19 chan_sip.c WARNING Maximum retries exceeded on transmission 7345fbe815ed6b6f65b3848936e4af95@192.168.168.1 for seqno 102 (Critical Request)