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Cisco Unified Communications Manager Administration Guide
OL-18611-01
Chapter 101 SIP Profile Configuration
SIP Profile Configuration Settings
Enable VAD Check this check box if you want voice activation detection (VAD)
enabled; leave it unchecked if you want VAD disabled. When VAD is
enabled, no media gets transmitted when voice is detected.
Stutter Message Waiting Check this check box if you want stutter dial tone when the phone goes
off hook and a message is waiting; leave unchecked if you do not want a
stutter dial tone when a message is waiting.
This setting supports Cisco Unified IP Phones 7960 and 7940 that run
SIP.
Call Stats Check this check box if you want RTP statistics in BYE requests and
responses enabled; leave unchecked if you want RTP statistics in BYE
requests and responses disabled.
If this check box is checked, the phone inserts the headers RTP-RxStat
and RTP-TxStat as follows:
• RTP-RxStat:Dur=a,Pkt=b,Oct=c,LatePkt=d,LostPkt=e,AvgJit=f
• RTP-TxStat: Dur=g,Pkt=h,Oct=i
where:
• Dur—Total number of seconds since the beginning of reception or
transmission.
• Pkt—Total number of RTP packets that are received or transmitted.
• Oct—Total number of RTP payload octets that are received or
transmitted (not including RTP header).
• LatePkt—Total number of late RTP packets that are received.
• LostPkt—Total number of lost RTP packets that are received (not
including the late RTP packets).
• AvgJit—Average jitter, which is an estimate of the statistical
variance of the RTP packet interarrival time, measured in timestamp
unit and calculated according to RFC 1889.
• a, b, c, d, e, f, g, h, and i—Integers
Table 101-1 SIP Profile Configuration Settings (continued)
Field Description