User Guide

QVoice Symphony measurements are possible on all generations of
cellular networks (2G, 2.5G, 3G and 4G). They are organized into two groups:
Subscriber View
QVoice Symphony collects Quality of Service measurements including
real speech and video quality, drop call rates, failed call rates, SMS/MMS/
e-mail success rates and delivery times, FTP/UDP/HTTP throughputs, and
other IP-data parameters.
Engineering View
QVoice Symphony delivers detailed air interface information such as
signal strength, signal quality, interference, serving/neighbor cells, layer 3
messages and more. This engineering information allows drill down and
detailed analysis of the reasons for low QoS in the network.
QoS Measurements
Mobile speech call test parameters are user-defined and can be MOC,
MTC, MOC/MTC mixed, or mobile-mobile. The speech signal direction can be
uplink, downlink or half-duplex. Call duration, retry interval, pauses, and
other criteria can be pre-programmed.
Important voice benchmarking KPIs are as follows:
Service Accessibility – percentage of call attempts that fail
Call Setup Time – delay time before a call starts ringing
Retainability – how often subscribers are not interrupted by
dropped calls
Voice Quality – a value of voice quality scores as classified to a
vast majority of user (MOS)
4 TEMS™ SYMPHONY SUITE
CoMpREhEnSIVE BEnChMARKInG SUppoRT
Thematics Editor in Symphony GUI