All your eggs in one voip
Reminds me of the time when a satellite office network failed.
Raise a help desk ticket? No, network is down.
Phone help desk? No, the phones were voice-over-IP.
Mobile phone help desk? Anyone know the real number? It's on the intran... Oh.
Someone had the page open, so rang it. To find external calls were barred.
Eventually solved via a personal call to a colleague's mobile at the main site who scurried down to the depths of the IT cave and caressed the offending router.