It goes through a series of tests, memory, flash, keys, display, hook etc. a little like booting an old index phone up while holding 1 down.
I get stuck on Headset Control Test - I guess I just need to plug in an electronic hook switch?
I presume once all the tests are complete there will be an option to restart normally.
Could be quite useful if I can get out of it - i'll have a play with it tomorrow.
ACSS - SME
APSS - SME
APDS - Unified Communications
ACS - IP Telephony
ACA - IP Telephony