It means you aren't missing any actual calls by keeping your PSTN line engaged, the call is recorded for hilarity, and you can take the call when you aren't at

It means you aren't missing any actual calls by keeping your PSTN line engaged, the call is recorded for hilarity, and you can take the call when you aren't at home. You can make an otherwise boring car journey far more entertaining by having the scammer assist you rebooting your fictional router. Also I've not tried this yet but supposedly it's now easy to log SIP devices in. But now I'm wondering about putting them through to some ridiculous pre-recorded messages to hear the reaction...