peter.king@LIGO.ORG - posted 09:24, Tuesday 13 December 2016 - last comment - 14:07, Tuesday 13 December 2016(32508)
PSL phone disabled
The PSL Enclosure phone has been switched off. A reminder that it needs to be re-enabled when work is being done in the Laser Area Enclosure. The power supply for it is in Rm 163.
The "2nd phone" heard in the audio recording from DetChar is the phone in the PSL enclosure anteroom. It is important to note that there is no call forwarding involved, both phones always ring if you call the PSL enclosure extension. The anteroom phone always lags behind the laser room phone though, which is why it appears to be forwarding the call. It sounds so faint because of the acoustic damping of the laser room (these phones are quite loud). Switching off the PSL enclosure phone turns off both the laser room and anteroom phones. This was tested this morning, as we can hear the anteroom phone from outside of the PSL enclosure; when the enclosure extension was called, no ringing was heard. To my knowledge neither of the PSL enclosure phones have the capability to auto-answer, they will continue to ring until physically answered or the caller hangs up.