Operation Manual

Configuring the Voice Settings
SIP
Cisco SPA100 Series Administration Guide 55
1
SDP Payload Types
RTCP Tx Interval 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
No UDP Checksum Select yes if you want the ATA to calculate the UDP header
checksum for SIP messages. Otherwise, select no.
Default setting: no
Stats In BYE 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>.
Field Description
NSE Dynamic
Payload
NSE dynamic payload type. The valid range is 96-127.
Default setting: 100
AV T D y n a m i c
Payload
AVT dynamic payload type. The valid range is 96-127.
Default setting: 101
Field Description