VOIP rtp header compression?

From: David Fahed (dfahed@xxxxxx)
Date: Wed May 30 2001 - 12:13:40 GMT-3


   
Hi,

R1---S0----------S0----R2
R1 and R3 : As5300
why when I use ip rtp header-compression on the S0 and I generate a voip call,
I make a sh ip rtp header-compression, I have this result :

RTP/UDP/IP header compression statistics:
  Interface Serial0:
    Rcvd: 0 total, 0 compressed, 0 errors
             0 dropped, 0 buffer copies, 0 buffer failures
    Sent: 0 total, 0 compressed,
             0 bytes saved, 0 bytes sent
    Connect: 16 rx slots, 16 tx slots, 0 long searches, 0 misses

How rtp header compression work?
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