Table of Contents
Advertisement
IVX
CO L
C
INE
ONNECTION
IVX's advanced CO Line circuitry provides for Open Loop detec-
tion and built-in Caller ID interface.
These features require more precise CO Line conditioning than
was originally established for mechanical switches by the Bell
System.
Note: CO Line Tip & Ring polarity must be observed.
To verify line polarity, use a volt meter set for DC volts. Measure
the CO Lines when the lines are idle with the bridge clips
removed.
1. Connect the black (negative) lead of a meter to the ground
source used to ground IVX.
2. Connect the Red Lead to Tip (the first lead of the pair). Less
than 2 volts should be read.
CO
3. Verify that the second lead is Ring: -40 to -53 volts.
4. Repeat the steps above for all CO Lines
The CO Lines are connected via the last 4 pairs on each Port
Card's 66 Block. See Figure 1. Observe correct order of con-
nection to preserve proper rotary hunting of the CO Lines.
H
I
ARDWARE
NSTALLATION
IVX
2.9
Black (-) Lead
to ground
Advertisement
Table of Contents
