Nortel Meridian 1 Manual page 45

Flexible analog line circuit card Page 43 of 44
Ground button detection
The ground button detector sends a recall signal 30 to 50 ms after the
application of a ground on either the Tip or Ring of the line. The ground must
be applied for a time greater than the minimum hookflash time. The loop
resistance to the ground signal can be between 0 and 500 ohms.
The transmission path is interrupted for no longer than one second after the
ground recall signal has been applied.
Transmission parameters
Loss values for the NT5K02LB Flexible Analog Line card are as follows:
Analog to Digital loss:3.5 dB
Digital to Analog loss:8.5 dB
Intelligent peripheral equipment circuit cards for New Zealand Option 11 - Description and Instal-