Installation without modifications The IB512 is inserted between the user's data terminal and the modem on the leased line or radio link. No changes to the installation are required.
   
   
Continuous monitoring of the leased line The IB512 continuously monitors the quality of the leased line without using any bandwidth-clock signals, modem status signals and data scrambling and unscrambling as per IUT recommendation V38.
   
Automatic, manual or remote-controlled switching to and from back-up Switching may be automatic, manual, using controls on the front panel, or remote-controlled from a central unit using BACKUPVIEW software.
   
Switching schedule

To avoid unnecessary switching, a schedule can be set up to determine the times at which switching is authorized. The schedule can be configured remotely under Windows.
   
Remote management BACKUPVIEW and IB TERMINAL software may be used to control switching and change the setup on a series of backup units remotely via an ISDN line.
   
V11, V35 or G703-G704 interface The IB512 interfaces with the data terminal via a V11 or V35 link; an optional G703-G704 card is also available.
   
Upgradable from 128 kbps to 512 kbps Product design is modular. The ISDN back-up data rate can be increased in 128 kbps increments up to 512 kbps, to keep pace with increased traffic on the leased line.
   
Bypass relays Leased lines generally cater for critical corporate needs. It is consequently essential that the back-up units never interfere with leased line operation. In the event of failure, the IB512 can simply be shut down; internal relays carry out the bypass function.