Cisco SR520-FE-K9 Administration Manual page 126

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RTP Packet Size
Max RTP ICMP Err
RTCP Tx Interval
No UDP Checksum
Cisco SRP500 Series Services Ready Platforms Administration Guide (SRP520 Models)
Packet size in seconds, which can range from 0.01
to 0. 1 6.
Valid values must be a multiple of 0.01 seconds.
The default is 0.030.
Number of successive ICMP errors allowed when
transmitting RTP packets to the peer before the
SRP terminates the call. If value is set to 0, the SRP
ignores the limit on ICMP errors.
The default is 0.
Interval for sending out RTCP sender reports on an
active connection. It can range from 0 to 255
seconds. During an active connection, the SRP can
be programmed to send out compound RTCP
packet on the connection. Each compound RTP
packet except the last one contains a SR (Sender
Report) and a SDES.(Source Description). The last
RTCP packet contains an additional BYE packet.
Each SR except the last one contains exactly 1 RR
(Receiver Report); the last SR carries no RR. The
SDES contains CNAME, NAME, and TOOL
identifiers. The CNAME is set to <User
ID>@<Proxy>, NAME is set to <Display Name> (or
Anonymous if user blocks caller ID), and TOOL is
set to the Vendor/Hardware-platform-software-
version (such as Cisco/srp5201.0.31(b)). The NTP
timestamp used in the SR is a snapshot of the
SRP's local time, not the time reported by an NTP
server. If the SRP receives a RR from the peer, it
attempts to compute the round trip delay and show
it as the <Call Round Trip Delay> value (ms) on the
Voice > Info page.
The default is 0.
Select yes if you want the SRP to calculate the
UDP header checksum for SIP messages.
Otherwise, select no.
The default is no.
Configuring Voice
Configuring Voice Settings