PART THREE - ADVANCED FEATURES
001-0131B October 1997 Page 19
3.4 REDUNDANT TERMINALS
3.4.1 Do you plan to have a fully redundant 2000 Series terminal to serve as a hot standby system
to back up the primary system?
yes
no
If a fully redundant backup system is desired, it is recommended that the backup system duplicates the
primary system in terms of software, features, and interface cards. The Standby System Controller will
automatically switch control from the primary terminal to the backup terminal upon detection of a CPU,
power supply, or transmitter failure. The Standby System Controller can be manually switched as well.
Note that at present, the Standby System Controller cannot switch over T1 spans to a backup terminal
and that when the switch over occurs voice mail messages will not be available because the reside on the
hard disk on the primary terminal. In order to maintain voice prompts, they will need to be manually
backed up to the spare terminal periodically.
3.4.2 Calculate the number of line transfer panels (901-9197) required
none
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
This will be the total of the following: Section # panels
One Line Transfer Panel is required for every five Dual Telco
Cards
3.2.11.1
3.2.11.2
One additional Line Transfer Panel is required for each 2000
Series Chassis (2200, 2200EX) that has one or more 4-wire
Dual Trunk Interface Cards installed in it
3.2.11.2
One Line Transfer Panel is required for every two Radio
Station Cards
2.6.1
One Line Transfer Panel is required for each Multiport Serial
Card
2.2.3
One Line Transfer Panel is required for an TNPP Network
Card (needed if answer to section 3.1.2 or 3.1.1 is YES)
3.1.2 or 3.1.1
TOTAL # panels:
3.4.3 Calculate the number of Standby Control Units
none
1
2
3
A Standby Control Unit can accept a maximum of six Line Transfer Panels. If more Line Transfer Panels
are required to support all the interfaces on the primary unit, then additional Standby Control Units may
be used. Calculate the number of Standby Control Units (901-9196), by taking the number of line transfer
panels from section 3.4.2 and dividing it by six.
3.4.4 Standby System Controller Power Supply
Order the power supply type needed (probably the same as specified in section 7.4).
Available Part Numbers
950-9380
Power Supply for SSC (115VAC 60Hz)
950-9350
Power Supply for SSC (48 VDC VAC 50/60 Hz))
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