System power requirements, System power requirements -3 – Verilink AS2000: The Basics (880-502981-001) Product Manual User Manual
Page 33
Site Planning
Verilink Access System 2000: The Basics
3-3
T1 Network
Interface
Each NCC, SCC, and TAC must be within the following cable
distances from connected equipment:
•
655 feet (199 meters) maximum from DSX-1 equipment. This
distance determines the pre-equalization option setting
toward the equipment.
•
3000 feet (914 meters) maximum from the first repeater on the
network. This distance determines the network line build-out
option setting.
External Clock
Source
If an external clock is used to synchronize CSUs with DIUs. The
maximum permissible cabling distances to the clock source are:
•
150 feet (45 meters) with an external clock in an RS-422
format.
•
5 feet (1.5 meters) with an external clock in a TTL signal
format.
If an external RS-422 or TTL clock is connected to a TIU 2850, the
maximum cabling distances are the same as the external clock.
DTE Interface
The maximum cabling distance between an AS2000 data port and
your data terminal equipment depends on the type of interface.
•
250 feet (76 meters) for ITU-T V.35 operation.
•
200 feet (60 meters) maximum for EIA 530 or RS-422 operation
(decreases as data rate increase).
•
50 feet (15 meters) for HSSI.
NOTE: For long cable runs to DTE, use of TT timing is recommended.
System Power
Requirements
The AS2000 system uses a variety of power supplies that can
accommodate different commercial power sources. AS2000 system
components require a commercial power source free of surges and
other transient voltages. Commercial power requirements for the
AS2000 are listed in
and
Table 3-1 Multi-line Shelf Power Supplies
PAC 2910
110 Vac
50- to 60 HZ
75 Watts
15-amp circuit; separate branch
circuit for each AC power supply
PAC 2930
110 to 240
Vac
50 to 60 Hz
200 Watts
15-amp circuit; separate branch
circuit for each AC power supply
PDC 2920
48 Vdc
input
Separate fused
75 Watts
Associated battery return path for
each power supply; recommended
fuse size of 10-amp
PDC 2930
48 Vdc
input
Separate fused
200 Watts
Associated battery return path for
each power supply; recommended
fuse size of 10-amp