Page340 of 544 M5317BRI Terminal
553-3011-100 Standard14.00 January 2002
Restricted powering
A second dip switch (switch B), in the same location and accessible through
the same access hatch as switch A must be set to determine whether the
telephone accepts restricted powering from PS1 or PS2. As a rule, only one
telephone on a loop is designated for restricted powering and is named the
“designated” telephone. When an NT1 or line card reverses the polarity of the
PS1 or PS2 power output while operating from backup batteries, only a
“designated telephone” continues to operate.
Power consumption
The normal standby mode power consumption indicated below depends on
deactivating the S/T-loop (not currently supported).
Operating Mode M5317TX M5317TDX
Normal active 1.2.2W 1.5W
Normal standby 200mW 250mW
Voltage range
The following are the operat ing limits when attached to an S/T-loop:
24 V - Minimum DC input voltage at the line cord when the loop is full loaded
(PS2)
56.5 V - Maximum DC input voltage at the line cord when the loop is not
loaded (PS2)
Local power supply requirements
The following values apply to sealed plug-in AC transformers with rectified
DC output, used for local power supply from a wall-outlet directly at the
working location of the telephone.
Australia
Minimum AC voltage at outlet: 200 V rms
Maximum AC voltage at outlet: 280 V rms
Average maximum AC current required: 50 mA
AC supply frequency: 50 Hz
Minimum transformer output voltage: 24 V DC
Maximum transformer output voltage: 34 V DC