Owner's manual

ManualsBrandsNortel Networks ManualsVideo surveillance systems1000

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Functional description 117

• standard or complex balance impedance (600 or 900 ohm or 3COM1

or 3COM2) selectable on a per unit basis

• loopback of PCM signals over DS-30X network loop for diagnostic

purposes

The OPS analog line card contains eight independently configurable units.

Relays are provided in each unit to apply ringing onto the line. Signal

detection circuits monitor on-hook/off-hook signaling. Two codecs are

provided for performing A/D and D/A conversion of analog voiceband

signals to digital PCM signals.

Each codec supports four units and contains switchable pads for control of

transmission loss on a per unit basis. The following features are common

to all units on the card:

•

OPS or ONS service configurable on a per unit basis

• terminating impedance (600 or 900 ohm) selectable on a per unit basis

•

standard or complex balance impedance (600 or 900 ohm, 3COM1 or

3COM2) selectable on a per unit basis

•

loopback of PCM signals over DS-30X network loop for diagnostic

purposes

The OPS analog line card contains eight independently configurable units.

Relays are provided in each unit to apply ringing onto the line. Signal

detection circuits monitor on-hook/off-hook signaling. Two codecs are

provided for performing Analog/Digital (A/D) and Digital/Analog (D/A)

conversion of analog voiceband signals to digital PCM signals.

Each Codec supports four units and contains switchable pads for control of

transmission loss on a per unit basis. The following features are common

to all units on the card:

•

OPS or ONS service configurable on a per unit basis

• terminating impedance (600 or 900 ohms) selectable on a per unit

basis

• standard or complex balance impedance (600 or 900 ohms, 3COM1 or

3COM2) selectable on a per unit basis

• loopback of PCM signals over DS-30X network loop for diagnostic

purposes

Card control functions

Control functions are provided by a microcontroller, a card LAN interface,

and signaling and control circuits on the NT1R20 OPS analog line card.

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311 02.06 Standard

27 August 2008