Recommended Signalling & Media Protocol

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Jan 19th, 2009
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Hi,

In one of our customer's setup the Voice GWs will be in the DMZ zone , and CCM & CRS/IVR server will be in the intranel(LAN) zone.


What is the most recommended signalling & Medial protocol which most customers would use across firewalls?


thanks

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Nicholas Matthews Mon, 01/19/2009 - 04:21
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Hi,


For gateway protocols:


SIP - newest, requires more understanding, quite a bit of configuration

H323 - most mature, most support, have to implement entire dial plan on gateway

MGCP - very easy, CUCM controlled gateway, only 3-4 lines of configuration on gateway, pretty good.



In general - if you let the correct ports through, any of them should be fine.


Use the commands:

show ip nbar port | i h323

show ip nbar port | i sip

show ip nbar port | i mgcp


These will tell you the ports you need on your firewall.



hth,

nick

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