Toa VS-900 User Manual

Page 40

12.10. VS-900TI Tie-Line Interface Card Exchange Interconnection

Up to 16 exchanges can be tie-line interconnected using the VS-900TI card.

[Connection]
To interconnect the exchanges, use 2 twisted pair cables for lines, and a 2-core shielded cable for data lines.
A maximum of 4 lines can be connected. Refer to the following table for the maximum recommended length
for each cable type between exchanges.
(As to the cable connection, see the figure on the next page.)

Cable type

AWG24 (0.52 mm)

AWG22 (0.65 mm)

AWG20 (0.82 mm)

Distance

0.6 km

1 km

1.5 km

[Termination resistance setting]
When interconnecting three or more exchanges, change the SJP10 connection on each card as shown below,
with the exception of the cards in the rightmost and leftmost exchanges.

VS-900

VS-900TI

VS-900

SJP10

CN6

R26

SJP10

SW1

Two twist pair cables (voice line)
A 2-core shielded cable (data line)

Factory-preset status of SJP10

Termination resistance setting when
interconnecting 3 or 4 exchanges