Cisco SPA2102-SF Administration Guide - Page 133

ATA Voice Field Reference SIP page B 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 device 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 @, NAME is set to (or Anonymous if user blocks caller ID), and TOOL is set to the Vendor/Hardware-platform-software-version (such as Cisco/ATA device-1.0.31(b)). The NTP timestamp used in the SR is a snapshot of the ATA device's local time, not the time reported by an NTP server. If the ATA device receives a RR from the peer, it attempts to compute the round trip delay and show it as the value (ms) in the Info section of ATA device web page. The default is 0. No UDP Checksum Select yes if you want the ATA device to calculate the UDP header checksum for SIP messages. Otherwise, select no. Stats In BYE The default is no. Determines whether the ATA device includes the P-RTPStat header or response to a BYE message. The header contains the RTP statistics of the current call. Select yes or no from the drop-down menu. The format of the P-RTP-Stat header is: P-RTP-State: PS=,OS=,PR=,OR=,PL=,JI=,LA=,DU=,EN=,DE=. The default is no. Cisco Small Business ATA Administration Guide 133