3.12 Connection of Peripherals
BGM/MOH
The PBX provides Background Music and Music on Hold. Up to 2 external music sources (e.g., user- supplied radios) can be connected to the PBX.
CAUTION
•Wiring should be done carefully to prevent undue force being exerted on the plug. Otherwise, sound may only be heard intermittently.
•External Music Jacks are SELV ports and should only be connected to approved SELV devices, or in Australia, via the Line Isolation Unit with the Telecommunications Compliance Label.
Note
When the PBX and external music sources are not connected to the same earth, hum noise may be induced into Background Music and Music on Hold.
Pager
Up to 2 paging devices
CAUTION
External Paging Jacks are SELV ports and should only be connected to approved SELV devices, or in Australia, via the Line Isolation Unit with the Telecommunications Compliance Label.
PC/Printer (via RS-232C)
The PBX is equipped with an
IMPORTANT
To protect the system, keep the following in mind:
1.Make sure that both connector cases (frame ground) of the
2.If this is not possible, connect the frame of the PBX to the frame of the PC/Printer using an earthing wire in order to prevent difference in the electrical potentials.
Pin Assignments
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| EIA | CCITT | ||||
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6 | 1 | 2 | RD (RXD) | Receive Data | BB | 104 | |
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| 3 | SD (TXD) | Transmit Data | BA | 103 | |
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| 4 | ER (DTR) | Data Terminal Ready | CD | 108.2 | |
9 | 5 |
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5 | SG | Signal Ground | AB | 102 | |||
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| 6 | DR (DSR) | Data Set Ready | CC | 107 | |
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| 7 | RS (RTS) | Request To Send | CA | 105 | |
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| 8 | CS (CTS) | Clear To Send | CB | 106 | |
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