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TELEPHONE CONNECTIONS (OXYGEN 3 and 3 ST)

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Jumper setting LINE / PHONO on the INPUT B / Channel 4,5 & 6 Stereo input board (Oxygen 3 ST)

6 TELEPHONE CONNECTIONS (OXYGEN 3 and 3 ST)

The Telephone module features a built-in telephone hybrid.

The audio sent to the telephone caller is a mix-minus (N-1). The mix minus signal is the programme output

signal with the phone signal (caller’s voice) removed.

Connections:

LINE: RJ11 socket for telephone line connection

NOTE: Oxygen 3 and 3 ST hybrids operate on standard POTS (Plain Old Telephone Service) / PSTN

(Public Switched Telephone Network) analog telephone lines. Automatic line compensation is featured.

TEL / PHONE socket: allows the connection on parallel

of a external telephone set (f.i. for dialling services).

Please note that this socket is always active (i.e. it doesn’t depend on the ‘Hook’ button

The two RJ11 connectors will accept 4 conductor modular plugs, but only the 2 central conductors

(typically

Red & Green ) are used.

R/L (OUT REC on PIN RCA): double mono

output which allows recording of the telephone calls (either

SEND or RECEIVE signals).

CALL (terminal board connector): connector for external call signalling. A photocoupler inside the module

closes when a telephone call comes (ring).

NOTE: Typical current allowed on the photocoupler: 5 mA (max 10 mA). Max voltage allowed: 15 V.

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Axel Oxygen 3 Especificaciones Pagina 8