[cisco-voip] SIP Trunk between CallManager 6 & OnDO Server

[Jason Burns]

Are you sure the xlite phone is configured to accept inbound TCP?

The CallManager by default sends outbound TCP only. In CallManager you can
try changing the SIP Profile (or maybe it's security profile) associated
with the xlite phone to use UDP for the outbound protocol.

The only other reasons I can think of for the PC to reject the inbound SYN
from CallManager are a firewall on the PC vlocking TCP 5060, or the xlite
client is listening on another port.


On Tue, Jun 2, 2009 at 6:48 AM, Alan Su <cj.alan at gmail.com> wrote:

> Dear All,
>
> I'm having a problem to make call from IP Phone registered in CCM6 to SIP
> phone (X-lite) registered in OnDO.
>
> Topology:
> IPPhone -- CCM6 <-- SIP Trunk --> OnDO -- XLite
>
> All devices are in the same network segement.
>
> When I make a call from XLite to IPPhone, it works. But when I tried to
> make call from IPPhone to XLite, it just returned busy tone. I use Ethereal
> in OnDO server to capture packets, it did receive the packet from CCM6. The
> flow as below:
>
> 1. (source) CCM6, (destination) OnDO, (protocol) TCP, (info) 38988 > sip
> [SYN] seq=0 win=5840 len=0 mss=1460 tsv=612823 tser
> 2. (source) OnDO, (destination) CCM6, (protocol) TCP, (info) sip > 38988
> [RST, ACK} seq=1 ack=1 win=0 len=0
>
> Any suggestion would be very grateful, thanks a lot~
>
> Regards,
> Alan
>
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>
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