6
TECHNICAL NOTES
CONNECTING A HORN SPEAKER
•
An optional horn speaker (nominal impedance 8
Ω
) may be connected to the Tone
Ringer to provide a “directed” audible output. The in-built speaker is disabled if an
external speaker is used.
Two steps are involved to connect an external speaker:
DIRECT WORKING
Line
In
External
Speaker
1 2 3 4
P2
(1)
Strip the conductor ends, insert them into connectors 1 & 2
(EXTERNAL SPEAKER) on the left-hand side of the blue-
coloured screw-terminal block and tighten the two screws.
Speaker
INT
EXT
J1
A
B
(2)
Move the link on jumper J1 to the “EXT” position (the lower
two pins).
If the ringer needs to operate from a DC source instead of AC (as
sometimes occurs when using the “alarm contacts” from a PBX)
jumper J2 must be bridged
Test
J2
Direct
