IDEAL Networks VDV II PRO - Voltage Measurement; Detecting Voltages; Service Identification

7 VDV II Pro 158802.02
En
VOLTAGE MEASUREMENT
If a voltage greater than approximately 2 volts is detected on any pin(s), cable testing
and length measurement are not possible. Instead, VDV II Pro displays information
about the voltage(s) present and the type of service that those voltages indicate,
where applicable.
The display shows the detected voltage and the pins on which it is present, together
with polarity. Depending on the port and the voltages on the pins, the display also
shows the type of service detected on the cable…
Port
Service
Voltage
Pins
VOICE
PBX
>30v.
3-4 or 2-5
DATA
PoE
(See later section)
PBX
>30v.
4-5
ISDN
>30v.
3/6 – 4/5
Example 1 – PBX service on VOICE port
Example 2 – ISDN service on DATA port
Example 3 – Unknown service on DATA
Shows analog telephone
service (PBX)
Shows Pin 2 is 48volts
positive compared to Pin 5
Shows digital telephone
service (ISDN)
Shows Pins 3 and 6 are
38volts positive compared
to Pins 4 and 5
Warning Indication
Shows Pin 1 is 23volts
positive compared to Pin 7