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391 posts

Ultimate Geek

# 77286 14-Feb-2011 10:41
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Currently using Xnet fusion naked broadband and VFX, had the VFX running fine on a Grandstream GXP-2000 IP phone, but now have a Linksys SPA2102 to try.

Network is setup as follows:

1. Dynalink RTA1320v6, configured half bridge (PPP IP extension)
2. Linksys WRT54G:
- WRT54G LAN ports:
- 1) PC
- 2) Printer
- 3) Grandstream GXP 2000 IP phone (business line)
- 4) Linksys SPA2120 (residential line)
  -- The ethernet port of WRT54G is connected to WAN port of SPA2101

I have one phone/line plugged into SPA2101.

Outgoing calls on the SPA2102 work fine.
But incoming calls do not, go to voicemail, which suggests SPA2101 might not be registering correctly?

Grandstream phone works ok for incoming/outgoing (Kiwilink VoIP).
And the Grandstream phone worked fine when configered for VFX.

Could the nested levels of router devices cause the issue? NAT?

I tried the syslog settings in the SPA2101, but couldn't receive any output (can read syslog fine with the grandstream).

Is the network layout right?
Or should the SPA2102 sit between RTA1320v6 (adsl modem) and the WRT54G?

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3594 posts

Uber Geek


  # 439159 14-Feb-2011 11:07
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you probably have them both set to the same SIP port ie local SIP Port 5060 so natting is probably not working correctly on your router, try changing the local port on one of the devices to 5061 , also set a put a static IP on both devices and port forward 5060 to one and 5061 to the other.

Yes I am a employee of WxC (My Profile) ... but I do have my own opinions as well Wink


391 posts

Ultimate Geek

  # 439169 14-Feb-2011 11:17
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I've tried them on different ports, but still no luck.
Grandstream 5060 & 5062 (2 business lines).
SPA2102 5061

WRT54G is running DD-WRT, and port forwarded 5061 to the SPA2102


3594 posts

Uber Geek


  # 439207 14-Feb-2011 12:14
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right now your registration is only sending once every 1800 seconds by the looks of it , after 180 seconds it times out, some how your not passing this back every 180 seconds as requested by the 200 Okay message.

SIP/2.0 200 OK
From: Mike & Suzie ;tag=d28a22441645d69co0
To: Mike & Suzie ;tag=96141c3a-76466132-0-21472287-0
Call-ID: fda75dcb-194ef74c@
CSeq: 50120 REGISTER
Via: SIP/2.0/UDP;branch=z9hG4bK-7c8b2816
Contact: Mike & Suzie ;expires=180;q=0.5
Content-Length: 0

Registers every 1800 seconds, so basically falls off the air after 180 seconds because no register is sent


A clearer picture is here

Yes I am a employee of WxC (My Profile) ... but I do have my own opinions as well Wink


391 posts

Ultimate Geek

  # 439240 14-Feb-2011 13:19
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I have changed Reg Retry Intvl, Reg Retry Long Intvl and Reg Max Expires.
But no luck yet.

Got debug working, here is the register message:

Via: SIP/2.0/UDP;branch=z9hG4bK-68e83ea7
From: xxx <>;tag=5fd1ea91bafd6355o0
To: xxx <>
Call-ID: b0a7b272-351ad2ed@
CSeq: 13488 REGISTER
Max-Forwards: 70
Contact: xxx <sip:6xxxxxxx@>;expires=180
User-Agent: Linksys/SPA2102-3.3.6
Content-Length: 0
Supported: x-sipura

Out of interest, do these debug messages effect anything:

RSE_DEBUG: last unref for domain
RSE_DEBUG: unref domain,

391 posts

Ultimate Geek

  # 439244 14-Feb-2011 13:31
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Ok appears to be working now, calling into this number from my mobile works.

Although calling in from my grandstream phone (kiwilink Voip line) fails.
But thats another issue altogether I think, maybe the way the grandstream phone & spa2101 are networked.

3594 posts

Uber Geek


  # 439255 14-Feb-2011 13:52
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Your now registering okay, however it was strange as the 200 OK message from the SBC controls the frequency of the message timer not the CPE, so your CPE should be honoring the 180 expire timer and send a new registration just before it expires, in this case 180 seconds .... expires=180

Yes I am a employee of WxC (My Profile) ... but I do have my own opinions as well Wink


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