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Peripheral Installation
Music-On-Hold/Background Music Interfaces
12-8 Strata CTX I&M 06/04
Music-On-Hold/Background Music Interfaces
Strata CTX provides up to 15 MOH/BGM music source interfaces via the ACTU or BECU system
processor PCB, one or two BIOU optional interface PCBs, and RSTU standard telephone interface
PCBs. The destination of each music source is determined by system programming. The music
sources can be standard CD music players, telephony MOH machines and/or tape players, etc. The
music sources are connected to standard RCA type jacks on ACTU or BECU and BIOU and via a
dealer-supplied isolation transformer to RSTU (see Figure 12-8 for a connection diagram).
MOH is sent to callers placed on hold and BGM is sent to DKT telephone speakers and/or external
page speakers.
The ACTU, BECU and BIOU interfaces provide an input volume level control for each music
source. The volume levels of music sources connected to RSTU circuits rely strictly on the music
source volume controls.
MOH/BGM source output requirements:
• Output Impedance: 600 or 8 ohms
• Output voltage level: 0.14VRMS (-15dbm) ~ 0.77VRMS (0dbm).
An additional separate BGM source can be connected to the building’s external page amplifier to
play music over the paging speakers when the Strata CTX Page is not in use. This interface option
requires the BIOU zone relays or mute control (see External Page with BIOU Interface).