Atec Acterna-DSAM-6000 - Manual (Page 6)

Voice Over IP (VoIP) Testing
The DSAM-6000 offers two tiers of VoIP testing options and a range of VoIP
troubleshooting tools. One VoIP test enables services to be validated over a
DOCSIS connection (VoIPCheck™ Option). The other on networks that have
deployed PacketCable VoIP (TruVoice™ VoIP Option). The DSAM with its built-
in eMTA, can place calls as if they were from the CPE. This allows technicians to
fully test the VoIP registration process and verify dial tones from the network.
VoIPCheck Option
With VoIPCheck, the DSAM-6000 can test VoIP services independent of the VoIP
specification being used. VoIPCheck can segment RF issues from IP issues,
helping to eliminate organizational finger pointing. Packet statistics, including
packet loss, jitter, and delay, as well as call-quality results such as R-value and
MOS, are displayed on the screen. With its in-depth results analysis capability, the
DSAM-6000 can determine the source of call-quality problems, expediting the
troubleshooting process.
TruVoice VoIP Option
TruVoice VoIP enables the DSAM-6000 to measure packet statistics (packet loss,
delay, and jitter) and call quality (R-value and MOS) while on an active phone call
either placed or received with the DSAM’s eMTA. Listening to the call, the
technician can hear if there are any noticeable problems and review the
diagnostics displayed on the DSAM’s screen. The technician can call any phone
number on any system and measure call-quality throughout the call’s path to
locate the problem source quickly and easily.
Enhanced Downstream Spectrum
Technicians need to be able to see how the network is behaving and troubleshoot
whether channels have shifted, have missing carriers, or are experiencing in-
channel frequency response problems. Since most technicians do not require a
fully featured and expensive spectrum analyzer, the DSAM, with its enhanced
downstream spectrum, can help provide a technician with an “everyday”
spectrum analyzer. It allows the user to choose between two resolution
bandwidths (RBW) settings, 330 KHz or 30 KHz and modify the amount of time
spent measuring each frequency step, or dwell time of the analyzer, between 1 and
25 milliseconds. It also allows the user to see 4 MHz to 1 GHz, in 10 or 50 MHz
steps, without switching test modes. Furthermore, if viewing the return path
frequencies, the tech can turn on the internal low pass filter to eliminate noise
caused by the higher frequencies, providing a cleaner upstream view.
6
DSAM-6000 DIGITAL SERVICE ANALYSIS METER
VoIPCheck is a voice quality verification test that runs
over the DSAM’s cable modem DOCSIS connection. It
allows for segmentation between HFC and IP issues by
showing on which side of the CMTS data impairments
are present.
VoIPCheck displays packet loss, jitter and delay as well
as MOS and R-values.
Key statistics may be monitored on live telephone
calls using the TruVoice VoiP Option.