Toa VS-900 - Manual (Page 27)

27
[Connection]
• Connect the MS-900 to the VS-900MS using 2 twisted pair cables as shown below referring to the following
procedures.
1. Fit the 4P connector (supplied with the VS-900MS) to one cable end, and a 6-position 4-contact modular
jack (prepare locally) to the other cable end.
2. Connect the modular jack to the MS-900's modular jack using the modular cord (supplied with the MS-900).
• The table below shows the maximum cable distance.
Cable type AWG24 (0.52 mm) AWG22 (0.65 mm) AWG20 (0.82 mm)
Distance 0.9 km 1.5 km 2.3 km
Connect as shown below.
VS-900MS and MS-900 connection
2 twisted pair cables
2 twisted pair cables
LINE
LINE
1234
1234
1
2
3
4
1
2
3
4
VS-900MS
CN1
CN2
CN3
CN4
Line 1
for master station
Line 2
for master station
Front view of
the circuit board
Ferrite clamp *
Ferrite clamp *
Modular cord
(supplied with the MS-900)
Modular cord
(supplied with
the MS-900)
* Mount the ferrite clamp (supplied with the VS-900MS card)
on the cable in a way that the cable is looped one turn as
illustrated. (This countermeasure is for complying with the
CE marking and FCC requirements.)
VS-900MS card
Ferrite clamp
SFC-10
Note
When using a shielded cable, connect the shielded wire to the "FG" terminal of the exchange main frame.
Also, connect the unused cables, if included in a bundle of cables, to the same terminal.