CCI's Remote Tunable Narrow Guard Band Filter-Combiner (LLC) combines UMTS and GSM onto a single feeder without the insertion loss normally associated with passive combiners.  This new highly compact model reduces the guard band requirement to only 500KHz, restoring lost spectrum associated with previous units.  A precisely matched UMTS filter allows the UMTS carrier to be positioned anywhere in the band and provides high rejection of unwanted spurious emissions and noise.  Transmit paths are fully isolated to prevent intermodulation products.  Multiple units can be cascaded for deployment of additional UMTS channels.  When not tuning, no power is required, effectively becoming a pure passive low-loss filter combiner. Control is via TCP/IP or Ethernet requiring only a web browser.  All software is resident internally, no extra software or controller is required.  Note that the UMTS port (Bandpass) is Tx only but the GSM port (Bandstop) is fully duplexed (Tx/Rx).  The unit is housed in a single rack-mounted 19" by 1U assembly and can be used with CCI SCPA's for further feeder line reduction.