Services Units and Gateways
The DNI line card supports voice/data transmission at the rate of 128 kb/s (64 kb/s on each of
two voice channels) and 16 kb/s on one signaling channel over a loop length of up to 3280 ft
(1000 meters), using 24 - 26 AWG wire (25 - 27 IWG). The DNI line card provides full duplex
digital transmission of both voice and data.
There are 13 LEDs on the face of the card. The top 12, one for each line circuit, light when the
circuit is in use. The bottom LED on the panel lights to indicate an alarm condition within the card.
DNI Line Card Specifications
ONS/CLASS Line Card (North America Only)
The ONS (On-Premise )/CLASS (Custom Local Area Signaling Service) line card has 12 circuits
that connect up to 12 standard telephones with line loop resistance, usually not exceeding 600
ohms including the telephone. As such, the card is used to connect internal telephone
extensions close to the system.It supports both pulse (rotary) and tone dialing, and also supports
modems and fax machines.
These cards install in any peripheral interface card slot and are hot-swappable.
Each circuit has a LED on the front panel which lights to indicate that the line is in use. A
thirteenth LED at the bottom of the panel lights to indicate a failure on the card.
All signals are passed through the 2-wire to 4-wire hybrid circuit on the line circuit module. The
line busy status LED remains lit while the call is in progress. 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.
Number of Circuits per Card: 12
Power Consumption: 17.24 watts
External Loop Length: Up to 1000 meters; 24 or 26 AWG (25 or 27 IWG) twisted pair,
including up to 50 meters (162.5 ft.) 22 AWG (23 IWG) quad wire and
up to 3 m modular line cord without bridge taps.
External Loop Resistance: 300 ohms
Data Error Rate: Better than 1 in 10,000,000 bits, in the presence of an interferingsignal
(ringing)
Features Provided: Interface for MITEL SUPERSET 4000-series digital telephones,
SC1000 attendant consoles, PKM 12 and PKM 48 Programmable
Key Modules (See Note)
2-wire/4-wire conversion
Full DX chip on-board
High-level data link controller (HDLC) on-board
Compliance to Standards: Meets all ONS-type requirements for North America and the United
Kingdom
Meets Harmful Voltages requirement of POR1065
Note: The system does not support PKM or SUPERSET DSS modules attached to a
SUPERCONSOLE 1000. Analog Interface Modules (AIM) attached to a SUPERSET 4025,
4125, or 4150 are supported. The
DNIC MOH/Paging Unit is not supported.
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