Paging providers typically provide several mechanisms to send pages. Here's my take:

• SMTP This is the most widely supported, but least well defined. The format of the message is entirely up the provider and how they translate email to a page. Also, unless you do a bit of work, the message could sit in a local or remote mail queue. ( try a combination of Net::DNS::Resolver and Net::SMTP if you want to connect directly to the remote SMTP server).
• TAP (aka IXO ) This is probably the second most widely supported method. Clunky because you have to do it via a modem, but handy for the same reason. ( if your monitoring box notices that the network is down, the modem could still be accessible for notification). I've found it easiest to just have perl talk to kermit. Google around for a script called "ckepage.ksc".
• SNPP (simple network paging protocol) Third most widely supported method. Check out Net::SNPP. If your provider supports it, this is probably the most straightforward way to send pages.
• WCTP: (wireless communication transfer protocol ). This is probably the least widely supported protocol, but is the "latest/greatest" thing. I'm not aware of a perl implementation yet, but there general info here.

Other links that might be helpful:

• sendpage - a pretty comprehensive paging system that include SNPP and TAP clients, as well as an SNPP server
• Part of the kermit faq explaining how to send a page from kermit
• Net::Pager this perl module uses Simplewire's quasi-free paging service, which I don't like. Perhaps you will though.

I've done quite a bit of pager integration with perl, so feel free to /msg me if you need more specific info.

Good luck !

Update:This link has fairly decent information on which paging providers support SNPP, WCTP, etc. Also shows host and port names for the services.

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