Mitel 3300 - OPS Line Card (North America Only)

Hardware Technical Reference Manual
96
ONS/CLASS Line Card Specifications
The ONS/CLASS Line Card supports the Message Waiting feature. A high voltage (-140 Vdc)
is applied to the Ring terminal of the line to light a neon lamp on the subscriber’s set.
OPS Line Card (North America Only)
The OPS Line Card contains six off-premises line circuits. An Off-Premises (OPS) line circuit
is used where the line goes outside the building that houses the PBX and the line may be
exposed to extraneous high voltages or induced currents.
Number of Circuits per Card: 12
Loop Detector Threshold: 15 mA (+1 mA)
Trip Battery Ringing Interval: -48 Vdc nominal
Bridged Ringers: 5 (C4 or equivalent)
PCM Coding: -law
External Loop Resistance 600 ohms
External Wire Resistance 400 ohms
Power Consumption 9.09
Message Waiting Yes.
A high voltage (-140 Vdc) is applied to the Ring terminal
of the line to light a neon lamp on the subscriber’s set.
Calibrated Flash No
Nominal Ringing Voltage 80 Vrms
@ 20 Hz
External Loop Length: 1500 m (4875 ft), 26 AWG (27 IWG)
3800 m (12350 ft), 22 AWG (23 IWG)
Nominal Trip Battery
Silent Interval
-27 Vdc
Features Provided:
2-wire/4-wire conversion
Line protection
Positive disconnect
Analog-to-Digital / Digital-to-Analog conversion (u-law)
Line circuit status monitoring
Signaling (ringing, message waiting)
Calling party ID data to the set while the set is in an off-hook or in an
on-hook state.
Compliance to Standards: The ONS CLASS line card (NA) supports ONS CLASS sets (NA) that
meet the following specifications:
• ANSI/TIA/EIA-716 Standard "Telecommunications
Telephone Terminal Equipment - Type 1 Caller Identity
Equipment Performance Requirements"
• ANSI/TIA/EIA-777 Standard "Telecommunications
Telephone Terminal Equipment
- Type 2 Caller Identity
Equipment Performance Requirements".