i
LED1
Jl JW6/JW7 u17
SW1
I
Pl
Figure 37
Message Expansion Card
BACKUP VOICE TONE GENERATOR (562-896)
Features and Functions
An optional card that, if used, provides a backup voice/tone generator (VTG), and a relay which automatically
switches from the primary VTG (on the host card) to the backup VTG (on this card) when the primary VTG fails.
NOTE:
Both primary and backup VTGs simultaneously play duplicate messages. Hence, a switch from the primary
to the backup VTG can occur without message interruption.
l
The switching signal is controlled by the primary VTG’s CPU.
Component Locations and Functions (Figure 38)
Connector P 1
When mounted on an Audio Controller Board, Pl plugs into Socket J3; when mounted on the 562-972 Message
Expansion Card, Pl plugs into Socket Jl .
Figure 38
Backup Voice Tone Generator
63
To Next Page
Loading...
