louisc Report post Posted 09/11/2026 06:46 PM Hi Support, I'm trying to setup a SIP trunk between the voiceguide and my pbx but getting a 501 error from the voiceguide. See wireshark trace attached. Some help would be appreciated. voiceguide not registering 20260911.pcapng Share this post Link to post
SupportTeam Report post Posted 09/12/2026 02:01 AM (edited) Looks like MItel PBX (Mitel-330-ICP) is at 172.30.1.2, and VoiceGuide is at 172.16.0.71 The WireShark trace shows that right now the Mitel is trying to do a 'SIP Register' with HMP/VoiceGuide. HMP/VoiceGuide will answer all SIP calls arriving at its IP address. HMP/VoiceGuide does not require a prior 'SIP Digest Register' to do so, and indeed does not handle those 'SIP Digest Register' messages. So Mitel's SIP trunk can just be pointed at HMP/VoiceGuide's IP address with no other registration setup. If you want to ensure that only calls form Mitel will be answered then you can setup VoiceGuide script to only handle calls arriving from certain sources. This would be done by checking the value(s) or Result Variables before answering the call. eg: checking value of $RV_CIDNUMBER or $RV[sip_header_from] or $RV[sip_header_contact_display] or $RV[sip_header_contact_uri] See: https://www.voiceguide.com/vghelp/source/html/resultvariables.htm And additionally you can also use Window's Firewall to ensure that SIP/RTP traffic only arrives from the IP addresses you authorize - the PBX's IP, other IPs you use to test system, etc. See: https://www.voiceguide.com/vghelp/source/html/install_v7_dialogichmp.htm - "Firewall Configuration" section Edited 09/16/2026 08:41 PM by SupportTeam added the firewall use note Share this post Link to post
