CER 12.5 - Need to set up ONLY email alerting for some users

[kylebrogers]

Is there a way to set up only email alerting for an ERL's onsite alert contact?  The alerting number is a required field so I can't simply leave the field blank and I can't find a way to tell the system that for certain users, I only want email alerts while, for other users, I want email and phone alerts.  

[TomMar1]

Create another onsite alert.  For the one you do not want phone calls, just enter an invalid number 55555 or whatever fits your dial plan.  Then enter a valid onsite alert email address.  Assign one or the other or both as appropriate to your ERLs.