Right now my office use ADSL connection and sometime there is probem with it, so i'm planning to use internal (PCI) voiceband modem 56K v.92 as backup connection.

My questions are:
1. How to setup that modem on MikroTik, does it use PPP-Client? Do you know further information about this? because looks like there are many field to settings.
2. Is it possible to AUTO dial an ISP from that voiceband modem, if the ADSL connection get problem? then automatically set the routing to voiceband modem... (hmm.. i don't think so this will works, i think i need to use other PC and installed with voiceband modem, then set this PC as backup internet gateway, but i must connect/dial it to the ISP manually).
Do you know what i mean? i need less technical support of MikroTik, specially for Internet backup solution..
If the ADSL connection get problem, then use the voiceband modem connection, then back to ADSL connection if the connection is OK and disconnect the voiceband modem connection.
Or do i must do that manually?
3. My last question... when i use voiceband modem internet connection, how do i check the internet connection of ADSL? example of my above ideas:
Mikrotik (Local interface, ethernet interface to ADSL modem gateway, PCI Modem)
or
Mikrotik (Local interface, ethernet interface to ADSL modem gateway, ethernet interface to other PC as internet gateway use PCI modem)

Any idea / suggestion of this internet backup connection?

Thanks,
Yudi