Can VoIPmon be stand alone and work with other servers? Say a straight asterisk server? Soft phones? Etc?
VoipMON for your deployment would be on one VPS. You then choose which other servers on that network (VPS or other) mirror their data to voipMON.
Can voipMON be used for pre-sales testing of a site / network?
Yes – in so much as it comes through the server and its data is mirrored to the voipMON.