Aiphone AI-900 User Manual

Page 27

12.5. AI-900AL Telephone Interface Card Connection

12.5.1. Telephone and AI-900AL connection

The AI-900AL can be interfaced with up to 2 commercial telephone sets. Use the telephone which complies
with the FCC Regulation Part 68.

[Connection]
To connect the telephone set to the AI-900AL, use a twisted pair cable. The connector of the cable end going
to the telephone needs to be the type that can be connected to the telephone connector. Perform wiring as
shown below so that the loop resistance is less than 500

Ω including the telephone resistance.

Telephone and AI-900AL connection

AI-900AL

CN1

CN2

CN3

CN4

1 twisted pair cable

Telephone set

Line 1

for telephone

Line 2

for telephone

Front view of
the circuit board

Ferrite clamp *

* Mount the ferrite clamp (supplied with the AI-900AL 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.)

AI-900AL 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.