[cisco-voip] Mobile Device register to CallManager via Internet access

[Ryan Ratliff]

1. As long as the device doing the NAT/PAT can fixup the protocol (ie  
SIP) then this should work.
2. No idea, this sounds a bit like CUBE and is certainly better than  
having your CUCM open to every SIP device on the internet.
3. Will probably depend on the phone.  I'm pretty sure somebody wrote  
an app to let an iPhone act as a SIP client.

As Aman suggested you should also look into the CUMA/CUMC products.   
If you have lots of smart-phone users then this may be something of  
interest but is a lot more complicated than just running a SIP client  
on the phones.

-Ryan

On Jul 20, 2009, at 5:02 AM, Alan Su wrote:

Dear All,

My customer just raise a request that end users can use their mobile  
phone with Internet access (ex: 3G) to register to CallManager and  
get their DN to make internal calls. The VPN access is not allowed.  
My questions are:

1. does CUCM accept the client using PATed IP for registration and  
call setup?

2. can I use IOS router as a SIP GW to accept the request signal from  
Internet and then redirect it to CallManager?

3. any SIP client software can be installed in mobile phone which  
also support G.729? (Java-based will be better 'cuz it can fit most  
of the phone)

Any comments will be very grateful, thanks in advance.

Regards,
Alan


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