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

Page 394 of 544

Card-LAN

Electrical characteristics

Table 119
Electrical characteristics (Part 1 of 2)
Characteristic
Nominal impedance
Signaling range
Signaling type
Far-end battery
Near-end battery
Minimum loop current
Ground potential difference
553-3011-100 Standard 14.00
NT8D15 E&M Trunk Card
The Card Lan interface supports maintenance functions. The following list of
features are provided by the Card Lan:
• Polling form the Peripheral Controller
• Enable disable of the DS30X link
• Card status reporting
• Self-test status reporting
• Card ID
• Report configuration data
• Report of the firmware version
The Card Lan communicates through a serial communication link between
the trunk card and the Peripheral Controller. The microprocessor provides the
Card Lan function for the E & M Trunk.
The electrical characteristics of all trunk circuits are provided in Table 119.
DID Trunk
600 or 900 ohms, (selected
by software)
2450 ohms
Loop
-42 to -52.5 V
N/A
N/A
+ 10 V
January 2002
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