I P - D S U U s e r ’ s M a n u a l
02/02/08
9
2.3 Console
interface
This interface requires a standard RJ45-terminated twisted-pair data cable. It connects
as data terminating equipment (DTE) to an asynchronous device, and uses RS232-C
signaling. Connection to the
IP-DSU
console is required for initial administration or
StarKeeper® II NMS alarm collection. Otherwise, the console can be disconnected
during normal operation.
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2.4 Rack-mount
Panel
The
IP-DSU
rack-mount panel contains twelve slots to accommodate that number of
IP-
DSU
units. Each rack-mount panel fits in a 19 or 23 inch EIA standard-equipment rack
(use extension ears when mounting in a 23-inch rack). The rack-mount panel supports 1
inch, 1.75 inch and 2 inch spacing between vertical rail mounting holes. Mounting ears
for
IP-DSU
placements in the rack-mount panel are available.
2.5 Power
Interfaces
Dual power interfaces are present on the
IP-DSU
faceplate. A circular interface labeled
“5 VDC” mates with the barrel connector of a standard wall outlet AC to DC power
transformer for 115V AC installations. A three position (accepting return, minus and
ground power wires) terminal block labeled “48 VDC” is commonly used in central-office
installations.
The
IP-DSU
is factory configured for 115V AC usage. 48V DC operation requires a
different jumper setting on the
IP-DSU
system board.
(
See
Installation
Section
)
2.5.1 Stand-alone AC Power
For this application, a separate AC power supply is available. The power supply has a
six-foot cable that terminates with a barrel connector. The power supply plugs into a
standard 115V AC outlet. The barrel connector plugs into the circular connector labeled
“5 VDC” on the
IP-DSU
faceplate.
2.5.2 Rack-mount AC Power
IP-DSU
rack-mount AC power is the same as in the stand-alone case. This configuration
requires one AC power supply for each
IP-DSU
unit. However, it is recommended that
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The
IP-DSU
also supports console access through a TCP telnet connection and makes use of the
embedded device standard telnet server port (tcp
1023
). This service is available only when the unit is in
service.