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Community Member

VOIP PROTOCOLS

Hi all, can anyone tell me the main protocols that are used by voip, and the one i should look out for on my network when monitoring ?

4 REPLIES
Cisco Employee

Re: VOIP PROTOCOLS

Carl,

UDP is the protocol mainly used for VOIP traffic.It uses random ports from 16K -32K and uses the same to transport the voice traffic.

-amit singh

Re: VOIP PROTOCOLS

It uses the following

RTP - real time protocol (UDP as mentioned above)

Skinny - TCP 2000-2002

H.323 or MGCP for gateways

HTH, rate if ir does

Narayan

Community Member

Re: VOIP PROTOCOLS

can you explain to me what each is used for ? ie how call is setup, what protocol it uses for this etc ?

Re: VOIP PROTOCOLS

Carl,

Check out the following link. It will provide you with the information you requested.

http://www.cisco.com/univercd/cc/td/doc/product/voice/c_callmg/sec_vir/udp_tcp/41plrev2.pdf

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