Cisco SPA232D Administration Manual page 71

Configuring the Voice Settings
SIP
Cisco SPA232D Administration Guide
Field
RTCP Tx Interval
No UDP Checksum
Stats In BYE
Description
Interval for sending out RTCP sender reports on an active
connection. It can range from 0 to 255 seconds. During an
active connection, the ATA 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. The NTP
timestamp used in the SR is a snapshot of the local time
for the ATA, not the time reported by an NTP server. If the
ATA 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 Information page.
Default setting: 0
Select yes if you want the ATA to calculate the UDP
header checksum for SIP messages. Otherwise, select no.
Default setting: no
Determines whether the ATA includes the P-RTP-Stat
header or response in a BYE message. The header
contains the RTP statistics of the current call. Select yes or
no from the drop-down list.
Default setting: yes
The format of the P-RTP-Stat header is:
P-RTP-State: PS=<packets sent>,OS=<octets
sent>,PR=<packets received>,OR=<octets
received>,PL=<packets lost>,JI=<jitter in ms>,LA=<delay
in ms>,DU=<call duration
ins>,EN=<encoder>,DE=<decoder>.
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