[SIPForum-discussion] 501 not implemented

[Tshepo Kekana]

Hi

can someone assist, I am getting a 501 from the ISP when trying to place a
calls from one specific customer.

I checked the invite but i don't seem to find what is wrong with it.


INVITE sip:27828863266 at 41.208.52.7:5060;user=phone SIP/2.0

Via: SIP/2.0/UDP 66.8.114.20:5060;branch=z9hG4bKjgcral30bgo0hqsqs720.1

From: "FP Hillbrow
(K)"<sip:+27877402193 at 196.31.51.15;user=phone>;tag=1257524672-1323349529033-


To: <sip:27828863266 at 196.31.51.4:5060;user=phone>

Call-ID: BW150529033081211-2088874824 at 196.31.51.15

CSeq: 249800933 INVITE

Contact: <sip:66.8.114.20:5060;transport=udp>

P-Asserted-Identity: "FP Hillbrow (K)"<
sip:+27877402193 at 196.31.51.15;user=phone>

Privacy: none

Supported: 100rel

Allow: ACK,BYE,CANCEL,INFO,INVITE,OPTIONS,PRACK,REFER,NOTIFY,UPDATE

X-BroadWorks-DNC: network-address="sip:+27877402193 at 196.31.51.15;user=phone
";user-id="0877402193 at 192.168.100.1"

Accept:
application/media_control+xml,application/sdp,application/x-broadworks-call-center+xml,multipart/mixed


Max-Forwards: 13

Content-Type: application/sdp

Content-Length: 219



regards,

Tshepo
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