What are people using in business or enterprise networks to send out-of-band alerts? We are using Orion NMS to monitor many servers, switches, routers and other devices. The software sends alerts to a paging service via a modem. We are finding that the paging service coverage is poor and often times we don't get coverage. I don't want a solution that sends email via the network that I am monitoring because we are monitoring the Internet connection and the email servers etc. I need to get notified if those things are down. Is everyone still using pagers for this or something else?