
INSTALLATION LBI-39153
7
This can cause difficulties. For instance, if you order a
voice grade line and don't specify the loss, you will typically
get a line with 10 dB of loss at 1000 Hz. The 1950 Hz loss
will normally be 8 dB more than at 1000 Hz. By adding the
4 dB long-term variation and the 3 dB short-term variation
the worst case 1950 Hz loss would be 25 dB. It then follows
that you cannot send any lower than -5 dBm. If the phone
company will not allow you to send continuous tone as high
as -5 dBm, then you will have to ask for a lower loss circuit
or add conditioning.
When ordering voice lines for a voting system, ensure
all lines are of the same type with similar characteristics.
This will help prevent changes in pitch and intensity as a
signal is voted between sites.
All phone lines carrying data must be Type 3002 Data-
Grade Telephone Lines without additional conditioning (or
equivalent). To ensure the proper data-grade circuit is
obtained when leasing a telephone line, request a 4-Wire
3002 Data-Grade line from the local or regional telephone
carrier. If using an equivalent line, it must meet the
following specifications:
•Frequency response:
1000 Hz Reference
500 - 2400 Hz -1 to +3 dB
300 - 2700 Hz -2 to +6 dB
•Maximum Frequency Error = ±5 Hz
•Maximum Net Loss = 16 dB
•Maximum Group Delay (800-2400 Hz) = 2000 µS
•Minimum S/N Ratio = 24 dB
UNPACKING EQUIPMENT
EDACS Voter equipment is generally packed in one of
the following two ways:
• Bolted vertically to a mini pallet approximately 36”
deep x 32” wide, with a corrugated cardboard
cover held down with two plastic straps. This
technique is generally used for domestic shipments
of 83-inch cabinets. The mini pallet adds
approximately three inches to the overall cabinet
height. The weight varies according to the content,
but generally runs from 300 pounds to 600 pounds.
• Crated vertically or horizontally. This technique is
generally used for 86-inch open-racks and overseas
shipments. Crates may contain one or several
cabinets or racks, and the dimensions and weight
will vary accordingly. If size and weight limits are
required, contact the factory for special packing
instructions.
Cabinets packed on mini pallets can be moved with a
hand-truck, crates may need a fork lift or pallet jack,
depending on the size. Wrenches will be needed to unbolt
the cabinets from the mini pallets, and a crowbar and
hammer will be useful in opening the crates. Do not leave
packed or unpacked equipment where they can be rained on.
Upon receipt of the EDACS Voter equipment, carefully
examine each carton. If any damage is detected, note the
damage on the Bill of Lading.
Move the cartons as close as possible to their mounting
location.
Unpack the equipment and carefully examine each item.
If there is any damage to the equipment, contact the carrier
immediately and have their representative verify the
damage. If you fail to report the shipping damage
immediately, you may forfeit any claim against the carrier.
When unpacking the equipment, check the contents
against the packing list. Contact your Ericsson Inc.
representative and the carrier if any discrepancies are noted.
VOTER CABINET RACK-UP
Each Voter system is unique and specific installation
requirements will vary greatly depending on the number of
channels per shelf and the number of sites supported.
However, with the exception of the Voter Cross Connect
Panels, all of the Voter equipment is housed in either 83-
inch cabinets or 86-inch open racks and interconnected as
Voter Units.
A Voter Unit consists of a Digital Voter Shelf, two (2)
Analog Voter Shelves (three (3) for 13 to 17 site systems),
and an EDACS Interface panel. The number of Voter units
contained in a cabinet or rack ranges from two (2) units per
rack, for 13 to 17 site systems using 83-inch cabinets (with
or without power supplies) or 86-inch open racks (with
power supplies) to four (4) units per rack, for 2 to 12 site
systems using 86-inch open racks (without power supplies).
Refer to the Assembly Diagram 193D1054 to determine the
proper rack-up configuration for the system.
The EDACS Interface Panel mounts in the rear of the
cabinet or rack and acts as the central cabling point between
the individual Voter components (each Voter Unit) and the
Voter Cross Connect panels (Analog and Digital) normally
located in a separate Cross Connect rack.