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Freeway
Range
Pro-Bel
ltd
Other signal formats
MAD! and binary high-bit-rate telecom signals should be treated as digital video.
Other telecom signals, eg HDB3 signals at 34Mbit/s, 8448 and 2048kbit/s are
more akin to analogue video, but the presence of high frequency clock signals
inside the frame is more likely. The installation of telecom equipment may
require reference to telecom standards. These usually use unbalanced BNC
connections, but occasionally balanced 120Q circuits will be used, and should be
treated as AES3
.
Other balanced signals such as X21 (64,128,384,728 and 2048kbit/s) should be
treated as RS422/y11 control ports, and generally use 'D' type connectors.
Equipment with control ports
Cable should be of good quality with a foil shield. This shield must make contact
all round at the entry to the mating connector body at both ends of the cable. Pro
Bel equipment with control interfaces are fitted with
'0'
type connectors and the
shield is grounded to chassis at the point of entry. The 'D' type shield should be
of the tinned type fitted with screw-locks and with dimples on the male part.
Ribbon cables are NOT suitable under any circumstances outside of the
equipment frames
.
• 2.4 Maintenance and warranty
Warranty statement
The warranty period covering Pro-Bel hardware is 5 years from the date of
shipment. During the first two months of this period, any defective product will
be exchanged free of charge.
For the remainder of this period any defective product returned carriage paid will
be repaired or replaced free of charge within our normal turnaround period of 21
days. Where the defect is attributable to misuse or physical damage the warranty
will be deemed void with all costs associated with the repair or replacement
subject to charge
.
Standard repair charges will apply to bought in items, power supplies, etc.
Repairs required in less than the normal 21 day period will incur additional
charges.
6540T-00 Nov 97
10
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