Hello Kenneth -
Recall that Cisco acquired the Telecaster series of IP phones (i.e. 7910, 7910+SW, 7940, 7960) with the acquisition of Selsius
"Skinny" Station Protocol is used between the IP Phone and to/from one or more Cisco Call Managers on the following TCP Ports:
2000 for Selsius Ethernet Phone (SEP)
2001 for Selsius Digital Access (SDA)
2002 for Selsius Analog Access (SAA)
UDP Ports 16,384 - 32,767 are used by the Real-Time Transport Protocol (RTP) to carry the audio media stream to/from a similar Skinny Client or H.323 terminal. These UDP port ranges are synergistic with those used on Cisco IOS gateways.
Does this answer your question?
C Wood
fc@wood.org