Why and Back to Use cRTP
cRTP does not technically accomplish compression. Rather, cRTP leverages the actuality that
much of the attack advice in every packet in a VoIP beck contains redundant
information, and cRTP again suppresses the sending of that bombastic information. For
example, afterwards a VoIP alarm breeze is established, every packet has the aforementioned antecedent and destination
IP addresses, the aforementioned antecedent and destination UDP anchorage numbers, and the same
RTP burden type. By caching this bombastic advice in the gateways at anniversary end of
a link, sending bargain headers, and again reassembling the abounding header, cRTP can achieve
significant bandwidth accumulation after any accident of information.
RTP attack compression additionally reduces aerial for multimedia RTP traffic. The reduction
in aerial for multimedia RTP cartage after-effects in a agnate abridgement in delay. RTP
header compression is abnormally benign back the RTP burden admeasurement is small; for example,
for aeroembolism audio payloads of 20 to 50 bytes.
Use RTP attack compression on any WAN interface area you are anxious about
bandwidth and area there is a aerial allocation of RTP traffic. RTP attack compression can
be acclimated for media-on-demand and alternate casework such as Internet telephony. RTP
header compression provides abutment for real-time conferencing of groups of any size
within the Internet. This abutment includes antecedent identification abutment for gateways such
as audio and video bridges and abutment for multicast-to-unicast translators. RTP header
compression can account both telephony articulation and multicast courage (MBONE) applications
running over apathetic links.
Note Using RTP attack compression on any accelerated interfaces (that is, annihilation over
T1 speed) is not recommended. Any bandwidth accumulation accomplished with RTP attack compression
might be account by an access in CPU appliance on the router.