The 4201-00 provides four bridge circuits and the 4202-00 provides six bridge circuits. Each port receives VF or data signals from all other ports of the bridge and transmits signals to all other ports.

4201-00 Four-Wire, Four-Way Conference Bridge		4202-00 Four-Wire, Six-Way Conference Bridge

• Used with voice or data up to 9.6 Kbps
• Front-panel accessible RCV CAL (receive calibration) and XMT CAL (transmit calibration) jacks for simplified alignment
• Selectable -7 dB (receive) and -16 dB (transmit) pads for each bridge circuit allows proper levels to carrier facilities
• 0 dB loss bridge with an adjustable gain of -10 to +22 dB (receive-to-transmit)
• Powered from any input voltage between -22 and -55 Vdc
• SX (Simplex) leads for each transmit and receive port

The 4204-03 bridge provides distribution from a four-wire master port to four four-wire slave ports. The 4204-11 bridge is used with the 4204-03 to provide five additional ports.

4204-03 Master/Slave Bridge		4204-11 Auxiliary Bridge

• All master and slave ports are provided with transformer isolation
• Each port has front-panel bantam test jack and derives an SX signaling lead
• Master port provides impedance of 150, 600 or 1200 ohms with strapping options
• Slave ports provide impedance of 600 or 900 ohms with strapping options
• 4204-03 has loopback capability
• When optioned on the 4204-03, sealing current may be applied via the SX leads of the XMT and RCV master ports