Line Powering Options - Nortel Meridian 1 Administration And Maintenance

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Line powering options

553-3011-311 Standard 7.0
Chapter 5 — ISDN BRI line and packet data implementation
— connect a maximum of two ISDN BRI terminals requiring B-channel
transmission or one terminal using both circuit-switched voice and data
to each DSL for a non-blocking configuration
— select the appropriate number of D-channel terminals based on the
transmission speed of each terminal on the DSL
— select the appropriate timing mode when you configure the DSL using
Service Change BRI Program LD 27
— place the terminating resistor box (A0378866) at the end of the loop,
refer to Figure 13.
Figure 13 shows a wiring example of a SILC DSL with multiple physical
terminations and the terminating resistor at the end of the loop. a SILC DSL
consists of a six-wire twisted pair cable, but only four wires carry the signal
and two wires provide conduit for an auxiliary power source. This external
power source can be used when the total power consumption exceeds 2 Watts
on each DSL. In this case the terminals need to be configured to use the
auxiliary power source (PS2) or other auxiliary power supplies as part of their
product packages.
Note: An AC/DC adapter is available for the Northern Telecom
M5317DX ISDN BRI telephone set. This is used when a closet optional
power supply is not available and the set is not powered from the DSL.
Power
When power is supplied from the S/T interface, the terminal devices must not
draw more than 2 Watts of power. With this arrangement, power to the
terminal devices on the DSL is not interrupted during commercial power
failures if the Option 11 system is equipped with batteries.
May 1999