[cisco-voip] RTP ports used by phones

[Ryan Huff]

Ed,


http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/port/10_0_1/CUCM_BK_T537717B_00_tcp-port-usage-guide-100/CUCM_BK_T537717B_00_tcp-port-usage-guide-100_chapter_01.html


Could it be that you're seeing something from the ephemeral port range 32768 - 61000?


Thanks,


= Ryan =



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________________________________
From: cisco-voip <cisco-voip-bounces at puck.nether.net> on behalf of Ed Leatherman <ealeatherman at gmail.com>
Sent: Tuesday, January 19, 2016 11:46 AM
To: Cisco VOIP
Subject: [cisco-voip] RTP ports used by phones

I've notice this a few times bouncing on ACL, thought it was worth asking about.

I see in numerous documentation that CUCM uses 16384 - 32767 for RTP - the documents specifically say IP Phone to IPVMS.

I observed an 8945 Cisco phone listening on 32768 and 32769 (assuming RTP and associated RTCP) due to access list not permitting it. Is there a doc somewhere that shows different/expanded range of ports that Cisco phones will use?



--
Ed Leatherman
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