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Dialogic
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SS7G21 and SS7G22 Signaling Servers Hardware Manual Issue 7
Note: For AC powered products, the power source may be connected and turned on during Power
Supply Module installation/replacement. When hot-swap functionality is required two AC power
cords must be connected.
Install or replace an AC Power Supply Module as follows:
1. Squeeze the green locking tab on the AC Power Supply Module (labeled A in Figure 17).
2. Rotate the green handle downward (labeled B in Figure 17).
3. Using the green handle, pull the Power Supply Module or filler module outward (labeled C in Figure 17).
4. When installing/reinserting a Power Supply Module, make sure the green handle is in the downward
position before sliding the module into the Power Supply Cage. Press the module firmly into place, then
rotate the handle upward to complete the insertion.
Figure 17. Unlocking and Removing an AC Power Supply Module
9.3 Hard Disk Drive (HDD) Replacement
The SS7G20SHDD Spare Hard Disk Drive for Dialogic® SS7G21 and SS7G22 Signaling Servers, consists of a
spare hard disk drive, which contains the operating software for use with a SS7G2x Signaling Server. It
allows the recovery of systems that have suffered HDD failure, but is subject to the pre-condition that the
system operator must have prepared a System Configuration backup in advance of the HDD failure. It is
recommended that this is done once a system installation is complete and operating as intended, and should
be repeated each time significant configuration or license changes are made.
The SS7G20SHDD is preinstalled with SS7G2x Software Distribution V4.04 or later.
CAUTION 1
Both module positions should have either a Power Supply Module or a filler module
installed whenever the product is operational. Otherwise the cooling efficiency of the
remaining module is impaired. During a Hot-swap operation there is a brief interval
when one position is empty. If the replacement Power Supply Module is not
immediately available, then a filler module must be installed.
CAUTION 2
AC Power Supply Modules cannot be used in the DC-input Power Supply Cage, and
similarly, DC Power Supply Modules cannot be used in the AC-input Power Supply
Cage. The correct product variant/Power Supply Module must be specified at time of
ordering, see Chapter 12, “Part Number Reference”.
C
A
B
AC power supply module shown