I have an Avaya environment (4 sites) and moving to Cisco Unified Communication. We have started with the HQ first and then we go through the other 3 sites. Currently, in addition of Fax machines, we have analog lines that we use in order to send messages to the pagers or Cellulars when there're errors with the system. As the other 3 sites are still Avaya we need to communicate them by modem in order to resolve the issues in the case of errors. Certain people use modems to communicate with banks. We have about 22 modem lines in the HQ. My question is do I need to use a VG224 or 248 for this matter? Can I use a direct connection from patch panel to the modems? What advantage am I going to have by using VG224/248 over connecting the modems manually to the patch panel?