Nortel Networks BCM50 - Manual (Page 119)

119
Installation and Maintenance Guide
Chapter 11
Installing the analog terminal adapter
This section provides installation instructions for the analog terminal adapter 2 (ATA2) or ATA.
The ATA2 connects a standard analog voice device or data communication device to the BCM50
system through a digital station module. Examples of analog voice devices are analog telephones
and answering machines. Examples of analog data communication devices are modems and fax
machines.
The ATA2 is designated as either an ONS (on-premise station) or an OPS (off-premise station)
port.
For information about installing an ATA2:
• Configuration overview on page 119
• Installing the ATA2 on page 120
• Configuring the ATA2 on page 123
For ATA2 specifications, see the table ATA2, ASM8, ASM8+, GASM, and GASI analog device
specifications on page 47.
Configuration overview
This section describes environment configurations for connecting analog and data devices to the
main unit using an ATA2:
• Analog telephone on page 119
• Analog data device on page 120
Analog telephone
The figure Analog telephone installation overview on page 119 shows an installation overview for
connecting an analog device through an ATA2 to the main unit.
Figure 53 Analog telephone installation overview
Analog telephone
ATA2
Line loop resistance:
135 ohms maximum
Terminal loop resistance:
1300 ohms maximum
ATA2 power cord
BCM50