Avaya 555-233-116 - Manual (Page 26)

909A/B universal coupler
555-233-116 26 Issue 4 October 2002
Figure 1. Typical 909A/B universal coupler
The 909A is the direct current (DC) version of the coupler, and cabinet power
supplies -48 VDC power. The 909B is the alternating current (AC) version, and
power is supplied from a separate power supply (such as the KS-22911L2).
The DIP switches on the unit set:
■ Protection/Paging selection — For AUX trunk paging and malicious call
trace, set to C2. Set the switch to C1 for all other applications.
■
Output attenuation (-9 or -15 dBm) — Setting depends on output level of
music source.
■
Output impedance (8 ohms, 1.5 k
Ω
, and 50 k
Ω
) — This switch only
requires setting if the Protection/Paging switch is set to C2 and the coupler
is supplying background music to a customer-supplied paging amplifier.
The pinouts for J1, J2, and J3 are provided in Table 2 , Table 3 , and Table 4 . Refer
to these tables when connecting music or paging equipment.
1. 909A/B universal coupler
2. J1 8-pin modular jack
3. J2 8-pin modular jack 4. J3 7-pin modular jack
5. DIP switch location
909_brkt KLC 042296