can you send an email to your phone number, will it come in as an SMS message ?  Either way you are not getting away from using email based form of notification.  So your boss want to you monitor this array until it gets under support with 3rd party company ?  In my experience those companies don't provide any software support, hardware only.
Hello,  We are going third party support for some of our VNX arrays. While our procurement team is in the process of contract review, we need to setup call home via a local modem for about a month or two.  It's been awhile since I have done this, any ideas would be most appreciated.  Thanks in advance,  admingirl
directing call home to in house modem