12-23-2009 01:19 PM - edited 03-15-2019 08:53 PM
Hi friends,
We have 2branches one in Ind and other in US and at US end we have 2800 cisco router and we installed CCM X.X,configured all basic things what all to have and NATed CCM IP to Public IP address.coming to india side we have four 7940G phones and DSL Internet connection.Question is? can we register these phone to US CCM by giving Public IP address as server IP by adding manually in Phones.help me is this possible or not....thanks in advance....
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12-23-2009 01:45 PM
Here's the thoughts that come to mind. My short answer is 'no' but others may disagree. My recommondation would be to install an independant CME router at the remote site in India.
12-23-2009 02:26 PM
Do not insist on having phones and CM with public addresses. That is unconvenient and unsecure.
Instead configure a VPN between sites and you will be fine.
12-23-2009 01:45 PM
Here's the thoughts that come to mind. My short answer is 'no' but others may disagree. My recommondation would be to install an independant CME router at the remote site in India.
12-23-2009 02:26 PM
Do not insist on having phones and CM with public addresses. That is unconvenient and unsecure.
Instead configure a VPN between sites and you will be fine.
12-23-2009 03:06 PM
Thanks a lot for ur best replies.....
12-23-2009 04:48 PM
I am planning to deploy ASA phone proxy with Cisco ISR G2, some ip phone registration to CME over WAN. What's 'unconvenient and unsecure' referred to?
12-23-2009 05:06 PM
p.bevilacqua's response was addressing the concept of UCM servers being given public (or NATed) IP addresses, not ASA Phone Proxy.
I am not a fan of Phone Proxy because it is a cumbersome, temporary, and inflexible solution to remote IP phones. That is purely my opinion however and others may see more value in it.
12-23-2009 05:15 PM
Thanks. If no ASA phone proxy, what's the solotion for remote ip phone with site-to-site VPN?
12-23-2009 05:35 PM
Here is what I say to my customers when I have this conversation. Again, this is my opinion, take it for what it is, it comes with no warranty.
Your currently shipping options, from most to least preferred are:
UCM 8.0(1) is expected to include another (better!) option for certain [current] phone models; however, you need to discuss that with your Cisco Account Manager. Details on UC 8.0 are in varying states of public vs. NDA and I'm not sure where this one is.
12-23-2009 06:14 PM
For centrically administration considerations , the deployment steps is CIPC with VPN client, ASA Phone Proxy and last step is site-to-site VPN. ASA Phone Proxy has better voice quality than soft phone? With site-to-site VPN , can centrically operate on head end without any local administration at the remote location(no professionals )?
12-23-2009 06:45 PM
To answer your questions:
12-23-2009 07:36 PM
Thanks Jonathan. 7940 ,7941, or 7942 has own DSP to process voice codec, your referring to CPU? With CIPC on netbook(intel atom 240 1.6Ghz,1GB RAM), any experience about voice performance?
12-24-2009 06:07 AM
I was referring to CPU in a general context. A physical phone has it's own processing abilities that are independant of the PC. The fact that a phone uses a DSP in addition to a CPU is not really relavent to this conversation.
I cannot speak to how well, or not, IP Communicator will work on your individual hardware. Test it and find out.
12-24-2009 08:56 PM
Thanks again. Throught the CVO solution, need routers(871,881 or 891/892) on the remote location, another router(for example, ISR G2 2901) on the head end. Any software need? Have a configuration example ?
12-25-2009 06:48 AM
All of those questions are addressed in the SRND I referenced above. I would suggest you read and consider the information in it before proceeding.
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