Electrical Characteristics; Physical Characteristics - Meridian Nortel 1 Option 11C Technical Reference Manual

Electrical characteristics

Table 114
Universal Trunk Card electrical characteristics
Characteristic
Terminal impedance
Signaling range
Signaling type
Far end battery
Near end battery
Minimum loop current
Ground potential difference
Low DC loop resistance
during outpulsing
High DC loop resistance
Line leakage
Effective loss

Physical characteristics

Electrical characteristics of the Universal Trunk Card are listed in Table 114.
DID trunk
600 or 900 ohms (selected by
software)
2450 ohms
Loop start
- 42 to - 52.5 V
N/A
N/A
+ 3 V
N/A
N/A
Equal to or greater than
30 kohms (tip to ring, tip to
ground, ring to ground)
See"PAD switching" on
page 383
In Meridian 1 Option 11C systems the NT8D14 Universal Trunk Card is
installed in slots 1 through 10 of the Main cabinet, or in slots 11 through 50
in the Expansion cabinets.
In Option 11C systems equipped with Meridian Mail, the Universal Trunk
card cannot be installed in slot 10 of the main cabinet.
NT8D14 Universal Trunk Card
Option 11C and 11C Mini
Page 381 of 544
CO trunk
600 or 900 ohms (selected by
software)
1700 ohms
Ground or loop start
- 42 to - 52.5 V
- 42.75 to - 52.5 V
20 mA
+ 3 V
< 300 ohms
Ground start equal to or
greater than 30 kohms; loop
start equal to or greater than
5 Mohms
Equal to or greater than 30
kohms (tip to ring, tip to
ground, ring to ground)
See"PAD switching" on
page 383
Technical Reference Guide