<p><font face="Arial" size="2">Hi Nick,<br></font></p>
<p><font face="Arial" size="2">My apologies for the confusion.</font></p>
<p><font face="Arial" size="2">Let me ellaborate further the diagram and description as i came to understand it further from time to time asking the provider.</font></p>
<p><font face="Arial" size="2">ip phone(skinny)---CCM7------SBC-------Huawei proxy server.</font></p>
<p><font face="Arial" size="2">The SBC suppose to be the one to control
over the signaling and usually also the media streams involved in
setting up the communication. Our CCM does have ip connectivity to the
SBC only and not the huawei device. Shouldn't it act like a CUBE so we
don't need connectivity to the public.</font></p>
<p><font face="Arial" size="2">Regarding the sip invite, i was refering
to the initial SIP INVITE requests sent by the CCM7 via sip trunk since
the call came from 7961 ip phones registered using SCCP on CCM7. The
7961 phone calls out. CCM7 suppose to initiate SIP invite request to
the configured ip address(SBC ip) on the sip trunk.</font></p>
<p><font face="Arial" size="2">If trunk is configured to point to the
CUBE(cisco router 10.10.10.2) then i sniff the packet on the
CCM(10.10.10.1). The sniffer trace has 10.10.10.1 Source address -
10.10.10.2 Destination address SIP invite.</font></p>
<p><font face="Arial" size="2">If however the trunk is configured to
point to the SBC directly, i see no SIP invite request initiated by the
Callmanager on the sniffer trace and also the provider claims that he
is not seeing any request comming from the CCM7 on their SBC.</font></p><p><font face="Arial" size="2">If the SBC or huawie does support only UDP, shouldn't i suppose to see SIP invite request via UDP porton the sniffer trace generated by the CCM? In the case CCM7 trunking directly to SBC without CUBE, i see no sip invite requested when cisco ip phones tried to make outgoing calls.<br>
</font></p>
<p><font face="Arial" size="2">I hope this clarifies the confusion.</font></p>
<p><font face="Arial" size="2">thanks,<br>Jeff</font></p><br><br><div class="gmail_quote">On Thu, Mar 4, 2010 at 10:52 PM, Nick Matthews <span dir="ltr"><<a href="mailto:matthnick@gmail.com">matthnick@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">I'm still confused on what you mean by no SIP invite.<br>
<br>
It's possible that the huawei only supports UDP SIP and it's not<br>
completing the 3 way TCP handshake. You can change that under the SIP<br>
profiles to be UDP only.<br>
<br>
Otherwise, check that huawei has routing back to the IP of your CUCM,<br>
and firewalls aren't involved.<br>
<font color="#888888"><br>
-nick<br>
</font><div><div></div><div class="h5"><br>
On Thu, Mar 4, 2010 at 3:38 AM, Jefflin Choi <<a href="mailto:jefflin.choi@gmail.com">jefflin.choi@gmail.com</a>> wrote:<br>
> Hi,<br>
><br>
> Thanks for all the reply.<br>
><br>
> Tried placing the a CUBE in the middle and seems like there is already SIP<br>
> invite being sent. Too bad the huawei isn't full configured yet to determine<br>
> if all is ok.<br>
><br>
> I was wondering....I tried to make a test call using SIP trunk directly to<br>
> the B2B SBC and no sip invite. But i did get sip invite when i pointed it to<br>
> the cube.<br>
> All i can see on the sniff trace from CCM to B2B is:<br>
> TCP 35472 > sip [SYN] seq=0 Win 5840 Len=0 MSS=1460 TSV=82731827 TSER=0 WS=2<br>
><br>
> In fact i just changed the ip of the CUBE to the B2B SBC to make sure<br>
> configs are exactly the same but no sip invite unlike when it is pointed to<br>
> the CUBE. Is this normal? Any thoughts?<br>
><br>
> Thanks,<br>
> Jeff<br>
><br>
><br>
><br>
> On Thu, Mar 4, 2010 at 1:10 AM, Mark Holloway <<a href="mailto:mh@markholloway.com">mh@markholloway.com</a>> wrote:<br>
>><br>
>> You most certainly need CUBE. You can find the CUBE guide for sip-to-sip<br>
>> here.<br>
>><br>
>> <a href="http://www.cisco.com/en/US/docs/ios/voice/cube/configuration/guide/vb-gw-sipsip.html" target="_blank">http://www.cisco.com/en/US/docs/ios/voice/cube/configuration/guide/vb-gw-sipsip.html</a><br>
>><br>
>><br>
>> On Mar 3, 2010, at 7:18 AM, Jefflin Choi wrote:<br>
>><br>
>> I see. So a router in the middle is required then. Doesn't the CCM7<br>
>> support it without the CUBE?<br>
>><br>
>> Thanks.<br>
>><br>
>> On Wed, Mar 3, 2010 at 9:48 PM, Dennis Heim <<a href="mailto:Dennis.Heim@cdw.com">Dennis.Heim@cdw.com</a>> wrote:<br>
>>><br>
>>> You will probably end up having to use CUBE, instead of terminating the<br>
>>> trunk to CCM.<br>
>>><br>
>>><br>
>>><br>
>>> Dennis Heim<br>
>>> Network Voice Engineer<br>
>>> CDW Advanced Technology Services<br>
>>> 11711 N. Meridian Street, Suite 225<br>
>>> Carmel, IN 46032<br>
>>><br>
>>> 317.569.4255 Office<br>
>>> 317.569.4201 Fax<br>
>>> 317.694.6070 Cell<br>
>>><br>
>>> <a href="mailto:dennis.heim@cdw.com">dennis.heim@cdw.com</a><br>
>>> <a href="http://www.berbee.com" target="_blank">www.berbee.com</a><br>
>>><br>
>>><br>
>>><br>
>>> From: <a href="mailto:cisco-voip-bounces@puck.nether.net">cisco-voip-bounces@puck.nether.net</a><br>
>>> [mailto:<a href="mailto:cisco-voip-bounces@puck.nether.net">cisco-voip-bounces@puck.nether.net</a>] On Behalf Of Jefflin Choi<br>
>>> Sent: Wednesday, March 03, 2010 8:31 AM<br>
>>> To: <a href="mailto:cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</a><br>
>>> Subject: [cisco-voip] CCM SIP connection to B2B getting fast busy<br>
>>><br>
>>><br>
>>><br>
>>> Hi,<br>
>>><br>
>>> I'm trying to configure a SIP connection to a 3rd party B2B SIP device,<br>
>>> then B2B will relay to a Huawei (SIP) device on the other end.<br>
>>> topology:<br>
>>> IP Phones ------CCM7 -------(provider)--B2B---------Huawei---pstn<br>
>>><br>
>>> configuration:<br>
>>> CCM is configured with SIP trunk with ip address of the B2B and route<br>
>>> pattern uses the SIP trunk configured. MTP required uncheck as of the<br>
>>> moment. codec G711uLaw and No authentication required.<br>
>>><br>
>>> Problem:<br>
>>> Outgoing call from IP Phone to PSTN gets fast busy signal. When placed a<br>
>>> sniffer in between CCM7 and B2B gateway, i didnt see any sip invite<br>
>>> initiated by the CCM7. CCM7 and ip phones only have traffic reachability to<br>
>>> B2B but not Huawei.<br>
>>> The provider (B2B to pstn) was tested using altitude(as claimed by the<br>
>>> customer) and works fine but we are testing using CCM7.<br>
>>><br>
>>> Question:<br>
>>> 1> Am i right to use CCM trunk to connect to the B2B sip?<br>
>>> 2> Any additional configs i need to configure? Misconfiguration?<br>
>>> 3>Should i expect SIP invite to be sent by CCM when call is triggered by<br>
>>> ip phones?<br>
>>><br>
>>> Thanks,<br>
>>> Jeff<br>
>><br>
>> _______________________________________________<br>
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>><br>
><br>
><br>
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</div></div></blockquote></div><br>