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3300 ICP Hardware User Guide
86 Release 3.3
parties. All signals are passed through the 2-wire to 4-wire hybrid circuit on the line circuit
module. The line busy status LED is lit while a station is off-hook. When calls are terminated,
receipt of an on-hook condition turns off the line status LED. The call is disconnected from the
circuit switch and the line circuit reverts to an idle condition.
The OPS line card also provides for “Ground button” signaling. A ground button, on a telephone
extension so equipped, provides a means of detecting a Ring lead with ground applied to it.
DTMF Receiver Card
The DTMF Receiver card is used to detect and decode dual-tone multi-frequency (DTMF) tone
signaling from telephone keypads and end-to-end signaling equipment. There are 12 DTMF
receivers located on each peripheral switch controller. If additional DTMF receivers are required,
the DTMF Receiver card provides 16 DTMF circuits.
The DTMF Receiver card connects to a Peripheral Interface card slot on the peripheral shelf
via connectors J1 and J2.
Operation
The DTMF Receiver card incorporates 16 DTMF receiver circuits that detect and decode DTMF
dial tones. Basic data and timing required for the DTMF Receiver card are supplied through
the peripheral backplane from the peripheral switch controller.
SUPERSET HUB
The SUPERSET HUB builds on the distributed system concept by delivering advanced digital
telephony functionality for workgroup. It allows SUPERSET telephones to be cost-effectively
provided where a distributed system would be too expensive.
The SUPERSET HUB provides DNIC connectivity through an RJ-45 patch panel and Fibre
Interface Module (FIM) connection to the host peripheral cabinet. At the peripheral cabinet, a
carrier module provides the connection for the FIM and interfaces back into the system. The
SUPERSET HUB may be rack-mounted or wall-mounted.
DTMF Receiver Card Specifications
Variants Available: A-law (UK), µ-law (NA)
Number of Circuits per Card: 16 DTMF receivers
Power Consumption: 3.43 watts
Features Provided: DTMF digit decoding (up to 16 DTMF Digits)
selectable line splitting function
digital loopback control
software-driven status lamp
Compliance: Complies with North American and CCITT specifications for tones.