Lyra Network clears all compatibility issues 

LyraNAC™ supports natively:

Any kind of modems

Any kind of useful modulations

PSTN   V22 V22B V22FC V29FC V32 V32B V34 V90 (synch. & asynchronous) ISDN   CANAL B   V110   V120 IP   GPRS   ADSL   WIFI

This list is not exhaustive: the existing architecture enables the integration of any kind of modems without any restriction so far.