Analog Loop; System Equipment And Supplies; Basic Hardware; Optional Equipment - Nortel BCM50 Installation And Maintenance Manual

• use of a station auxiliary power supply (SAPS) for loops 300 m (975 ft.) to 1200 m (3900 ft.).
In North America, the SAPS must be a CSA or UL approved Class 2 power source.
In Europe, the SAPS must be a Class II power source and CE marked.
• no bridge taps

Analog loop

The following parameters must be met for an analog loop:
maximum dc loop resistance of 208 Ω
•
• maximum cable length (0.5 mm or 24 AWG) of 1220 m (4000 ft.)

System equipment and supplies

Refer to the following sections for information on the equipment required to install the BCM50:
• "Basic hardware" on page 85
• "Optional equipment" on page 85
• "Installation equipment for the BCM50 unit" on page 86

Basic hardware

The BCM50 system consists of some combination of the following hardware:
• BCM50 Main Unit: BCM50, BCM50a, or BCM50e
• BCM50 Expansion Unit
• media bay module (MBM)
• telephones
• cabling for connections between hardware units
You can connect a maximum of two BCM50 Expansion Units to a BCM50 Main Unit. Each
BCM50 Expansion Unit can contain one MBM.

Optional equipment

You can add the following equipment to the system to support specific requirements beyond the
BCM50 basic hardware:
• station auxiliary power supply (SAPS)
• key indicator module (KIM) for T7316E telephones
• analog terminal adapter 2 (ATA 2) if connecting analog equipment to a digital extension line
• uninterruptable power supply (UPS)
• USB hub (required if the system uses a UPS)
System equipment and supplies
Check the installation prerequisites
85