Nortel Networks Video Gaming Accessories 553-3001-211 Manuale Utente

 NT8D15 E&M Trunk card

Table 199 lists the power requirements for the E&M trunk card. 

Signaling type

Loop

Ground or loop start

Far-end battery

-42 to -52.5 V

-42 to -52.5 V

Near-end battery

N/A

-42.75 to -52.5 V

Minimum loop current

N/A

20 mA

Ground potential difference

+ 10 V

+ 3 V

Low DC loop resistance 
during outpulsing

N/A

300 ohms

High DC loop resistance

N/A

Ground start equal to or 
greater than 30 kS. Loop start 
equal to or greater than 5 MS

Line leakage

Equal to or greater than 30 
kS (Tip to Ring, Tip to GND, 
Ring to GND).

Equal to or greater than 30 
kS (Tip to Ring, Tip to GND, 
Ring to GND)

Effective loss

See pad table

See pad table

+15.0 V dc

±5%

200 mA

–15.0 V dc

±5%

200 mA

+8.5 V dc

±2%

200 mA

–48.0 V dc

±5 %

415 mA