[Linksys 3102 + GrandSteam IP phone] Direct outgoing IP call?

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Subject	Author	Date
[Linksys 3102 + GrandSteam IP phone] Direct outgoing IP call?	Vincent Delporte	09-04-06

Posted by Vincent Delporte on September 4, 2006, 1:37 pm

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Hello

I've successfully set up the Linksys to ring up a GrandStream
IP phone directly (ie. with no SIP PBX acting as registrar) when it's
installed on the LAN, but the Linksys fails dialing that IP phone
through the Net.

Both the Linksys and the IP phone are located in private networks with
NAT firewalls standing on both sides, so I imagine I must modify some
settings in the Linksys, but I have no idea what to try besides adding
a STUN server in the SIP section (tun.fwdnet.net:3478, and STUN Enable
= Yes), and also configuring up the IP phone to use "NAT Traversal"
and the same STUN server as the Linksys.

FWIW, here's the output when I dial into the Linksys through the PSTN
port (the Linksys uses IP 192.168.0.253, 087077XXXX is the caller ID
number, sip.acme.com is the fixed public IP through which the IP phone
can be reached):

--------------- BEGIN LOG ------------------

<151>FXO:Start CNDD

<151>FXO:CNDD name=, number=087077XXXX

<151>FXO:Stop CNDD

<159>FXO:CNDD Name= Phone=087077XXXX

<151>AUD:Stop PSTN Tone

<151>Calling:101@sip.acme.com:5060

<151>[1:0]AUD ALLOC CALL (port=16394)

<151>[1:0]RTP Rx Up

<159>RSE_DEBUG: reference domain:sip.acme.com

<151>RSE:GetServerAddrErr(sip.acme.com,0)=-101

<151>TP:?Tx->0

<134>[1]->0.0.0.0:5060

INVITE sip:101@sip.acme.com:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.0.253:5060;branch=z9hG4bK-5924bcd9
Remote-Party-ID: fxo
Call-ID: 4e39ec6a-a7c16cbd@192.168.0.253
CSeq: 101 INVITE
Max-Forwards: 70
Expires: 240
User-Agent: Linksys/SPA3102-3.2.10(GW)
Content-Length: 277
Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER
Supported: x-sipura
Content-Type: application/sdp

v=0
o=- 19360 19360 IN IP4 192.168.0.253
s=-
c=IN IP4 192.168.0.253
t=0 0
m=audio 16394 RTP/AVP 0 8 100 101
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:100 NSE/8000
a=fmtp:100 192-193
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=ptime:30
a=sendrecv

<134>

<159>[0]FM Alert Stop RxTx (c=0023d298;a=0)

<151>[1:0]AUD Rel Call

<151>CC:Failed w/ Calling

<151>AUD:Stop PSTN Tone

<159>RSE_DEBUG: unref domain, sip.acme.com

<159>RSE_DEBUG: last unref for domain sip.acme.com

<151>Sess Terminated

<151>AUD:Stop PSTN Tone

--------------- END LOG ------------------

If someone successfully set up the Linksys to call out an IP phone
directly, ie. without first going through a VoIP server, can you tell
me what to change?

Thank you.

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Voice-Over-IP [Linksys 3102 + GrandSteam IP phone] Direct outgoing IP call?