The Total Access 1500 4W FXS Access Module is intended to be deployed in the Total Access 1500 Chassis. 
 The 4W FXS provides for one individual 4-wire analog interface between a VF transmission and signaling facility and the Total Access 1500 Pulse Code Modulation (PCM) backplane. 
 Each FXS interface provides for simultaneous four-state signaling in each direction for use with 4-wire off-premises extension, carrier extended PBX trunks, or subscriber line foreign exchanges using ground or loop start signaling system.
 
 Feature and Benfits
 
 One independent DC-isolated 4-wire VF channel interface
 Supports 4-state FXS Ground and Loop Start signaling 
 Supports equalizer prescription settings as defined in AT&T 855-351-105 (309B)
 Supports 150, 600 and 1200 ohms input/output termination impedance 
 Supports loaded and nonloaded cable types
 Extended operating temperature range from -40??C to +65??C 
 TLP transmit input range of -15.0 to +1.0 dBm in 0.1 dB increments
 TLP receive output range of -10.5 to +6.0 dBm in 0.1 dB increments 
 Provisioning from the SCU ADMIN port or remote craft interface