Port Numbers for VoIP

[ssidin]

Hi,

I have FXS and FXO phone connection. I want to do port filtering and set QoS (ip precedence using rate-limit) to control VoIP to pass thru an interface. What ports should I specify/block/open so that VoIP will get prioritized?

regards,

shah

[thisisshanky]

Voip payload uses UDP port 16384 through 32767.

If voice packets are marked with TOS = 5, you can match that traffic too and use LLQ to allocate priority queueing for voice traffic.

http://www.cisco.com/en/US/tech/tk652/tk701/technologies_configuration_example09186a0080101210.shtml#2

http://www.cisco.com/en/US/tech/tk543/tk544/technologies_tech_note09186a0080094ad2.shtml

[ssidin]

Thanks!

regards,

shah