Zhone IMACS 8000, Руководство пользователя

Страница: 44 / 788

2-6 Reference Guide
Model No.
Running Head
Power Supplies and Ringing Generators System Installation
2.4.1 System Power (Redundancy)
Note: The system always requires a 120/240 VAC or -48 VDC Power Supply. For backup,
you may add a second identical power supply. The shelf can also be power off of one
AC supply and one DC supply.
2.4.2 -48V Talk Battery Requirements
Talk battery is required whenever you have voice user cards in the system, unless (a) all of
those are E&M cards and are used in the Transmission-Only mode, or (b) Type 1 E&M
signaling is used. A -48 VDC power source is also required for use with the Alarm Cards,
OCU-DP cards, and to provide sealing current for BRI cards. The -48 VDC talk battery can
be provided from an external source, or by using a 115 VAC to -48 VDC Converter. This unit
is only available for 115 VAC sources. A similar AC-to-DC Converter is also available for use
with either 115 or 220 VAC.
2.4.3 Setting the U.S./European Configuration Jumper
Before inserting any cards into the chassis, set its JP1 jumper for either the U.S. or European
configuration. This jumper is shown in Figure 2-3; it is on the resource card backplane and is
accessible from the chassis front. The default jumper setting is US (for systems in the U.S. and
Canada). To change the chassis electrical configuration for European compliance (EUR),
move the jumper to pins 2 and 3.
Figure 2-3. JP1 Jumper Settings
Also be sure to set the jumper on the system resource cards and external alarm cards to agree
with the above setting for the chassis. Refer to the associated chapters in this guide for
information on those card jumpers.
1
2
3
JP1
EU
R
/US
1
2
3
JP1
EU
R
/US
U.S. Configuration European Configuration