This read-write integer (0-5000 milliseconds) sets how long the receiver-ready signal can drop before the switch disconnects the modem, with 0 meaning it waits forever. Admins tune it to control how tolerant the switch is of brief signal glitches on a modem-based console link before tearing down the call. For example, an admin on a noisy phone line experiencing frequent brief signal drops might increase hpSwitchSLinkModemLostRecvTime so momentary glitches don't disconnect the modem session.