Choosing a dial-in modem
How do I know which modem to choose if I need dial-in functionality?
The dial-in functionality in Winpager requires a voice modem, which is capable of performing dial-in.
Almost all the modems on the market today only handle data and fax. This is fine if you only need to dial out alarms from IGSS but this type of modem cannot handle dial-in.
When looking for a modem with dial-in functionality, make sure that it is a genuine voice modem. Look in the modem's AT reference manual to see if there are commands to switch between data, fax and voice mode. If the command for switching to voice mode is not there, it is very likely not a voice modem and you should continue your search.