1613-01: Loop Current Detection Timer [System: Timers: CO Interface Card: Loop Control (1613): Loop Current Detect]

For loop start lines, loop current must be present for this interval before the system seizes the line. Set this interval for compatibility with the connected telco or PBX/Centrex. If you set this interval too short, the system may inadvertently seize unstable lines. If too long, the system may not properly seize a valid line.