Electrical Specifications - Nortel Enterprise 1000 Reference Manual

Electrical specifications

Table 7
Universal trunk card – trunk interface electrical characteristics (Part 1 of 2)
Characteristic
Terminal impedance
Balance impedance
Supervision type
DC signaling loop length
(max)
Far-end battery
Succession Communication Server for Enterprise 1000 Circuit Card Reference Guide
Analog Trunk Cards - NT8D14 Universal Trunk Card
party. At the proper time, an intercepted call is connected to the appropriate
RAN trunk.
Programming RAN trunks
The type of intercept and the RAN trunk parameters are defined in the Trunk
Data Block LD 14, Customer Data Block LD 15, and Route Data Block
LD 16 programs.
The Trunk Data Block and Route Data Block programs specify the RAN
trunk, the type of announcement machine, the number of repetitions of
announcements before a forced disconnect (all calls) or an attendant intercept
is initiated (CCSA/DID calls only), and the point at which the trunk may be
connected to the announcement.
The Customer Data Block program defines the type of intercept and the trunk
route to which the intercept is to be connected.
Refer to the Succession Communication Server for Enterprise 1000 X21
Software Input/Output Guide Administration (553-3023-311) for instructions
on service change programs.
Table 7 gives the electrical characteristics of the universal trunk card.
CO/FX/WATS
trunks
600 or 900 ohms (Note 1)
600 or 900 ohms (Note 1),
3COM, or 3CM2 (Note 2)
Ground or
loop start
(Note 3)
1700-ohms loop
with near-end
battery of –42.75 V
–42 to –52.5 V
(Note 4)
DID or tie
trunks
Loop start
(with ans sup)
(Note 3)
2450-ohms loop
with near-end
battery of –44 V
–42 to –52.5 V
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RAN Paging
trunks trunks
600/900 ohms 600
(Note 1) ohms
N/A N/A
Continuous, N/A
level, or pulse
600/900-ohms 600
loop ohms
loop
–42 to –52 V N/A