3Com 980/000048/001 manual Appendix a Modem Specification and Interface PIN Assignments

A-6 APPENDIX A: MODEM SPECIFICATION AND INTERFACE PIN ASSIGNMENTS

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CAUTION: Danger of explosion if the battery is incorrectly replaced. Replace only with the same or equivalent type of battery as specified by the manufacturer. A used battery must be disposed of in accordance with the manufacturer’s instructions.

PBX and PABX Application

This unit has been approved for use of the following facilities.

Loop-disconnect and multi-frequency signalling.

Storage of telephone numbers for retrieval by a predetermined code.

Detection of initial proceed indication.

Detection of secondary proceed indication.

Operation in the absence of proceed indication.

Automatic dialling facilities.

Tone detection, for example, ring tone, busy tone.

Automatic answering of incoming calls.

Automatic clearing from call originating end.

Call progress monitor.

Series connection (via optional cable).

Modem.

Any other usage will invalidate the approval of the apparatus if as a result it then ceases to conform to the standards against which approval was granted.

This unit is only approved for compatible PBXs. The supplier of your unit should be consulted for an up-to-date list of PBXs with which this unit is compatible.

There is no guarantee of correct working in all circumstances. Any difficulty should be referred to the supplier of the unit.

This unit is suitable for connection to PBXs which return secondary proceed indication.