SIP in higher education

["Dinesh" <>]

Hi Stephen,

I had 2 nic cards on the SER machine.  One internal and One external.  I was
on the internal address, talking to the SER machine's external address for
registering my xten phone.  Obviously when I tried to register it took my
nat public address.  The reason why I did this, is because my ccm is on a
internal address.

Now I am thinking of just removing one nic card and trying to contact my
Asterisk Server with the SIP external IP address.  As I have asterisk server
on a public ip.  I will try it later if this works to the same with call
manager or do some intresting firewalling natting for 5060 for my call
manager.

To answer your question, I tried to call extension(9804 or 65869804) which
is behind the call manager from the SER SIP phone (xten lite).


>On the call manager make sure the SIP Trunk on the CCM has a Calling 
>Search Space (CSS) that is allowed to make calls to extensions, ie the 
>CCS has the necessary Partitions added.  - Please excuse the Cisco Call 
>Manager speak ;-).

I know what exactly you mean, when I was interfacing the cisco call manager
and asterisk, I had to worry about that.  Spend a quite a day trying to
figure this out.  

I will follow your other email also and get back to you shortly.  I will
also try the SER with one NIC instead of 2.

I think it would be great with the screen shots.  In Singapore there is
quite number of ccm installations, specially in the gov sector.  I think if
you guys made a screenshots, more people will be able to join the sip.edu
project.



Regards,

Dinesh.


-----Original Message-----
From: Stephen Kingham 
[mailto:]
 
Sent: Tuesday, June 28, 2005 3:52 PM
To: 

Subject: Re: [sip.edu] Cisco Call Manager 4.0 + Asterisk/SER ?

Hi

Can I presume you have the CCM calling the SER SIP Phone?


Dinesh wrote:

>Hi Stephen,
>
>I tried to configure this.  But I am having some problem to talk to the ser
>(from ccm4.0).  What is the string you used to talk or dial a extension
from
>ser to ccm 4.0? I assumed you used sip trunk between the ccm4.0 and ser.
>  
>


The string is the dialed digits. 
CCM ip address 192.168.63.242
Dialed digits 3575

In SER
 rewritehost("192.168.63.242");
then route call with
 t_relay();

On the call manager make sure the SIP Trunk on the CCM has a Calling 
Search Space (CSS) that is allowed to make calls to extensions, ie the 
CCS has the necessary Partitions added.  - Please excuse the Cisco Call 
Manager speak ;-).

You might need to look at an ngrep trace (try ngrep -p -q -W byline port 
5060)


Good luck and let me know how you go as I can probably help a bit more 
that these comments.

I guess we should document this with some screen shots for the Cookbook.

Stephen

>
>Regards,
>
>Dinesh.
>
>