Voxalot / SIP Broker Support Forums - View Single Post - in-bound calls either drop or do not stop ringing

ctylor · 02-24-2007, 07:18 PM

Unfortunately, connection problems due to firewalls are some of the most difficult to troubleshoot. Here's some advice (may have already been done):

0) Test calls from multiple sources, ideally both:
--a direct SIP URI call from a client like the Gizmo Project softphone
--a call from the PSTN to your DID that is either registered with Voxalot or mapped to Voxalot

1) Toggle from:

NAT Support Parameters heading:
Handle VIA received: No
Handle VIA rport: No
Insert VIA received: No
Insert VIA rport: No
Substitute VIA Addr: Yes
Send Resp To Src Port: Yes
STUN Enable: Yes
STUN Test Enable: No
STUN Server: stun.xten.com
EXT IP: (blank)
EXT RTP Port Min: (blank)
NAT Keep Alive Intvl: 30

to:

NAT Support Parameters heading:
Handle VIA received: Yes
Handle VIA rport: Yes
Insert VIA received: Yes
Insert VIA rport: Yes
Substitute VIA Addr: No
Send Resp To Src Port: No
STUN Enable: Yes
STUN Test Enable: No
STUN Server: stun.xten.com
EXT IP: (blank)
EXT RTP Port Min: (blank)
NAT Keep Alive Intvl: 30

2) Put your SPA-3000 in the WRT54's DMZ (or more exactly, forward the SIP and RTP port ranges used by the SPA to it).
see this thread to clarify why it might be good: http://www.dslreports.com/forum/remark,17884348

3) Toggle between Yes and No for the "Enable symmetric NAT handling" setting on your Voxalot portal.

4) Try temporarily to use a different router and start the process over.

02-24-2007, 07:18 PM	#2
ctylor Join Date: Apr 2006 Location: Vancouver, BC Posts: 296 Thanks: 94 Thanked 53 Times in 27 Posts	Unfortunately, connection problems due to firewalls are some of the most difficult to troubleshoot. Here's some advice (may have already been done): 0) Test calls from multiple sources, ideally both: --a direct SIP URI call from a client like the Gizmo Project softphone --a call from the PSTN to your DID that is either registered with Voxalot or mapped to Voxalot 1) Toggle from: NAT Support Parameters heading: Handle VIA received: No Handle VIA rport: No Insert VIA received: No Insert VIA rport: No Substitute VIA Addr: Yes Send Resp To Src Port: Yes STUN Enable: Yes STUN Test Enable: No STUN Server: stun.xten.com EXT IP: (blank) EXT RTP Port Min: (blank) NAT Keep Alive Intvl: 30 to: NAT Support Parameters heading: Handle VIA received: Yes Handle VIA rport: Yes Insert VIA received: Yes Insert VIA rport: Yes Substitute VIA Addr: No Send Resp To Src Port: No STUN Enable: Yes STUN Test Enable: No STUN Server: stun.xten.com EXT IP: (blank) EXT RTP Port Min: (blank) NAT Keep Alive Intvl: 30 2) Put your SPA-3000 in the WRT54's DMZ (or more exactly, forward the SIP and RTP port ranges used by the SPA to it). see this thread to clarify why it might be good: http://www.dslreports.com/forum/remark,17884348 3) Toggle between Yes and No for the "Enable symmetric NAT handling" setting on your Voxalot portal. 4) Try temporarily to use a different router and start the process over.