Siemens S30777-Q539-X telecommunications hardware (Hicom/HiPath/OpenScape PBX, SDH transmission) PBX Card / Module

The Siemens S30777-Q539-X is a PFT1 power/trunk failure transfer board used across the HiPath 3000, HiPath 3700, HiPath 3750 and HiPath 3800 systems. PFT boards provide an automatic failover path that connects a designated analogue extension directly through to an external line if the PBX loses power or a monitored trunk fails, so a site keeps at least basic outbound and inbound calling during an outage rather than losing all telephony until the system is restored. This makes it a business-continuity card rather than a capacity card: on the sites that have one fitted, it is the difference between total loss of service and a single working phone line during a fault. It plugs into the relevant HiPath chassis as a dedicated failover board rather than as general line capacity, so ordering a replacement is about restoring that continuity path specifically. Genuine Siemens spares of this kind remain a routine requirement for operators maintaining failover cover on established PBX installs. Confirm exact chassis compatibility before ordering. Tech-Star is UK-based and ships worldwide; contact our sales team for current stock and pricing.