GAI-Tronics 780-301 Page/Party Handset Station (Cenelec Zone 1) - Manual (Page 4)

Pub. 42004-638L2
Model 780/7805-301 Page/Party
®
Handset Stations for Cenelec Zone 1 Applications Page: 4 of 15
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Block Diagram
P1 is the 16-pin male connector located on the back of the Base-16 printed circuit board assembly
(PCBA). It plugs into the socket located inside the enclosure. The socket provides connection to the
multi-party or single party cable containing the Page/Party
® lines and ac power. The handset amplifier
PCBA connects to the handset and reed switch using lug connections E1 to E7. See Figure 4.
Interfaces
The assembly interfaces to the multi-party cable and the external loudspeaker via P1, the 16-pin
connector, and connector J1. The pin functions for connector P1 are described below:
Pin No. Function Description Pin No. Function Description
1 PL_L1 Party line (L1) 9 PL_L2 Party line (L2)
2 PG_L1 Page line (L1) 10 PG_L2 Page line (L2)
3 MT_L1 Mute (L1) 11 MT_L2 Mute (L2)
4 N/C No connection 12 N/C No connection
5 SPKR_8 Speaker (8-ohm) 13 EGND Earth ground
6 SPKR_16 Speaker (16-ohm) 14 SPKR_C Speaker (common)
7 N/C No connection 15 N/C No connection
8 AC_N AC neutral 16 AC_H AC hot
Figure 4. Model 701-202-EX Handset Station Block Diagram