[Asterisk-Users] Incoming calls using iconnecthere

[Luke Howard]

>When an incoming call is attempted Asterisk displays the following:
>
>Warning [131081]: chan_sip.c Line 1991: (__transmit_response): Unable to
>determine sequence number from ''

I've been seeing this problem within the last little while (sorry I
can't be more specific).

This probably isn't going to help you if you're behind NAT but it 
seems that changing the register host from natrelay.deltathree.com
to sipauth.deltathree.com fixed it for me.

-- Luke

--
Luke Howard | PADL Software Pty Ltd | www.padl.com