Page 556 of 906 NT8D09 Analog Message Waiting Line card553-3001-211 Standard 3.00 August 2005Table 179 provides a technical summary of the analog message waiting linecard.Table 179NT8D09 Analog Message Waiting Line card technical summaryImpedance 600 ohmsLoop limit (excluding set) 1000 ohms at nominal -48 V (excluding set)Leakage resistance 30,000 ohmsRing trip During silent or ringing intervalsRinging voltage 86 V ACSignaling Loop startSupervision Normal battery conditions are continuously applied (approxi-mately -44.5 V on ring and-2.5 V on tip at nominal -48 V battery)Power input from backplane -48 (can be as low as -42 for DC-powered systems), +15,-15, +8.5 V and ringing voltage; also -150 V on analog mes-sage waiting line card.Insertion loss 6 dB + 1 dB at 1020 Hz3.5 dB loss for analog to PCM,2.5 dB loss for PCM to analog
