asterisk SNMP monitoring that works

http://planet-diversity.blogspot.com/2010/08/monitor-asterisk-calls-using-snmp.html
This one works

Windows VPN Connection with automatic routes added without default gateway option

type c:\windows\vpn.bat

@echo off
rasdial VPN_CONNECTION_NAME USERNAME PASSWORD
for /f "tokens=15 delims= " %%A in ('ipconfig ^| find "192.168.200"') do @set GW=%%A
route add 192.168.45.0 mask 255.255.255.0 %GW%

DNS SRV records for SIP redundancy

DNS SRV records for SIP redundancy
http://blog.lithiumblue.com/2007/07/understanding-dns-srv-records-and-sip.html

SRV records for service redudnacy

You can use SRV records just like MX records for other services redundancy for services other than mail