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| Problem with L420e in a remote office (United Kingdom) |
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Hi All
We have our Swyx Server in a Head Office with users using either SWyxIt or L420e's - all is working fine.
HQ has a Cisco PIX connected to our remote sites which have Draytek Vigor Routers. In the remote sites, we also have a mixtures of SwyxIt & L420e's. The SwyxIt clients are working perfectly howeverwe are having issues with the Hard Phones.
Initially, we found that the connection kept dropping out, some calls were fine and some not. We then changed the audio settings to low bandwidth. Now the problem is that the phones keep logging on and off and when a call is connected, there is no sound.
Any suggestions? |
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| Re: Problem with L420e in a remote office (Norway) |
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The problem is the PIX. It probably has the 'H.323 Clean Up' parameter activated. Whenever we have some strange problem there is always Cisco equipment some place in the network. It is like they do it on purpose.
Morten Rokosz
(Swyx T.A.G Member)
Captain of the Golgafrinchan Ark Fleet Ship B
The best way to predict the future is to invent it. |
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| Re: Problem with L420e in a remote office (United Kingdom) |
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Thanks for this - we are having our firewall company look at it as well as looking into TCP Timeouts. If anybody has any other advice, I would be glad to hear it. |
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| Re: Problem with L420e in a remote office (Germany) |
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Yes, it's the TCP timeout. Pix router/firewall will kill the TCP connections after some time if no traffic is done and that's the case for the H.323 connections.
Therefore please disable the TCP timeout and it will work.
Stefan Ditscheid
Team Leader Protocols Development, Swyx
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| Re: Problem with L420e in a remote office (United Kingdom) |
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Again, thanks. Ou rout sourced Cisco Pix guy is away for a couple of weeks. I have a bit of knowledge and can sort the timeouts - can anybodypoint me in the right direction to turn off the h.323 clean up? |
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| Re: Problem with L420e in a remote office (Norway) |
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| sushibilly wrote
...can anybodypoint me in the right direction to turn off the h.323 clean up?
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Unfortunatly I do not have personal knowlegde of the Cisco PIX. We had a customer using it as a VPN gateway to HQ. They had the same problem as you described, only they used KIRK IP-600 IPDECT. Any outbound call would disconnect after 20 seconds. We first looked at the TCP timeouts but it did not help. Later the customer told me that they had solved it turning off something he called 'H.323 Clean Up'. There is a chance that this is not the real name of the parameter, only a phrase he used. But I think Cisco guys should know what it is....
Morten Rokosz
(Swyx T.A.G Member)
Captain of the Golgafrinchan Ark Fleet Ship B
The best way to predict the future is to invent it. |
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| Re: Problem with L420e in a remote office (Germany) |
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Hi,
i only have Cisco ASA Series (you can call them a newer PIX).
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00
timeout mgcp-pat 0:05:00 sip 0:30:00 sip_media 0:02:00
timeout uauth 0:05:00 absolute
are defaults.
so just change the timeout line where h323 is from 0:05:00 to 0:0:0 this should disable the default 5 minute timeout for h323 connections.
timeout sunrpc 0:10:00 h323 0:0:0 h225 1:00:00 mgcp 0:05:00 |
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| Re: Problem with L420e in a remote office (Netherlands) |
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The command to disable H323 cleanup on both the Cisco PIX series and the Cisco ASA series from the command line (conf term):
no fixup protocol h323
However: it might be better to also disable the h225 cleanup and the port 1720 (H323 hostcall). In that case the command would be:
no fixup protocol h323 h225 1720
Hope this helps. |
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| Re: Problem with L420e in a remote office (Germany) |
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Hi,
you are right. Sorry for the mistake. My command given is intended for cleaning up the NAT-Table entries for such H323 based connections.
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| Re: Problem with L420e in a remote office (United Kingdom) |
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Thanks for the help - that seems to have done the trick, although a little more testing will bwe required to confirm. |
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| Re: Problem with L420e in a remote office (Norway) |
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A customer has some problem with remote office as well, but not with sound. I really hope someone has experienced this, because I am clueless about this.
Quite often (around 1 of 4 calls) SwyxPhone restarts after a converastion when Swyx user is hanging up the handset. Have anyone of you seen this happen?
If they use the phone in the headquarter it works fine so it is not the phone (or SwyxServer) itselfs. If they try a phone from the headquarter, that has been working for years, and use it in the remote office the same thing happens.
Please help.... 
Morten Rokosz
(Swyx T.A.G Member)
Captain of the Golgafrinchan Ark Fleet Ship B
The best way to predict the future is to invent it. |
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| Re: Problem with L420e in a remote office (Germany) |
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Does the frequency of the problem relate with the call time ? Such that the problem appears more often, longer the call is active ?
I could imagine that there still is some timeout on a router device that makes a TCP connection invalid after a certain time of no traffic. In the event of disconnecting your call the phone or PhoneManager detects the invalid connection and goes through zero with the affected phone.
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| Re: Problem with L420e in a remote office (Norway) |
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I did not see that it happend more frequently when the call time increased.
I have scheduled with the customer tomorrow. We will do a wireshark trace on the remote side and on the swyxserver trace. I hope we will get a clue after that.
But you confirmed part of my suspision that the SwyxPhone has somekind of 'watchdog' that might reset it under certain circumstances.
Morten Rokosz
(Swyx T.A.G Member)
Captain of the Golgafrinchan Ark Fleet Ship B
The best way to predict the future is to invent it. |
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| Re: Problem with L420e in a remote office (United Kingdom) |
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Hi All
I need to reopen this one, remore SWYXIT! users having no problems, but Swyx Phones continualy logging them selves of and dropping voice etc. Phone controller trace is full of h323 entries.
If anybody has any idea of PIX settings that will help I would be very grateful! I can send the log files to anyboday that may be able to help. |
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| Re: Problem with L420e in a remote office (Norway) |
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You should look for something like this is the server-trace:
2007/05/11 08:23:33 5200 *ERR CorNetCon 012583f8 a215a123 SCorNetConnection::OnMediaInfo () *** port check failed ***
2007/05/11 08:23:33 5200 *ERR CorNetH323 05b65dc0 a215a123 CorNetH323Conn::OnConnectionEstab() Error at OnMediaInfo(IP: 10.0.215.123, RTP port: 5008, RTCP port: 5009, codec: G.711 u-law, framesize: 30)!
2007/05/11 08:23:33 5200 *ERR CorNetH323 0124dd48 00000000 CorNetH323Endp::OnConnectionEstab() Error at OnConnectionEstablished!
This indicates that the connection is dropped for some reason in the network.
Morten Rokosz
(Swyx T.A.G Member)
Captain of the Golgafrinchan Ark Fleet Ship B
The best way to predict the future is to invent it. |
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| Re: Problem with L420e in a remote office (United Kingdom) |
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I had the same issue of the phones restarting. I changed the tcp timeout and also played with the audio codec on the phone. Funnily enough I found the high quality codec was more stable than the low bandwidth one. |
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| Re: Problem with L420e in a remote office (United Kingdom) |
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| Andrew Hall wrote
I had the same issue of the phones restarting. I changed the tcp timeout and also played with the audio codec on the phone. Funnily enough I found the high quality codec was more stable than the low bandwidth one.
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Hi Andrew
Did you set the timeouts to a really long period or uncheck them/disable them? |
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| Re: Problem with L420e in a remote office (United Kingdom) |
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I disabled the TCP/IP timeout |
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| Re: Problem with L420e in a remote office (United Kingdom) |
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Hi All
I am still having problems with this. Basically the phones are logging themselves on and off. Also, we rae having problems with incoming calls, the caller cannot hear the person using the SWYX Phone, but the SWYX Phone user can hear the caller.
Below is a snippet from the phone controller traces. If anybody can help, I can email over more.
Thanks in advance
2007/09/18 01:22:27 5844 *ERR CorNetCon 03418610 a032a011 SCorNetConnection::OnClosedH323Chan *** h323 channel closed unexpectedly three times *** -> reboot phone
2007/09/18 01:22:29 5344 *ERR CorNetCon 03418610 a032a011 SCorNetCon::On_TC_DATAGRAM CorNetTS message indication failed : Unknown message
2007/09/18 01:22:31 5344 *ERR CorNetCon 03418610 a032a011 SCorNetCon::On_TC_DATAGRAM CorNetTS message indication failed : Unknown message
2007/09/18 01:22:33 5396 *ERR H323H245 012B5D00 a032a011 H245NegTerminalCapSet::HdlIncom () No matching capabilities in received TerminalCapabilitySet -> sending TCS Reject and clear call! |
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