Latency – IBM NETCOOL 4.3-W User Manual
Page 373
Chapter 7: Collection Formulas
Netcool/Proviso Cisco IP Telephony Technology Pack User’s Guide, Version 4.3-W
351
Latency
Type
Import
Description
An estimate of network latency, expressed in milliseconds.
This value represents the average of the difference between the NTP timestamp indicated by the RTP Control
Protocol (RTCP) messages and the NTP timestamp of the receivers, measured when these messages are received.
Cisco CallManager obtains the average by summing all the estimates, and then dividing by the number of RTCP
messages that have been received.
This metric comes from the CMR table. It is set once the call is established. This metric is only available for IP
phones.
Syntax
#Bulk Metric
Generic Database Alias
None.
Formula Editor Path
AP > Specific > Bulk > VOIP > Cisco > CMR