Quick view TN794 Network Control/Packet Interface CALL 888-832-4789 Each port supports 1 voice terminal, such as 500 (rotary dial) and 2500 terminals (DTMF dial). LED and neon message waiting indicators are supported (a separate power supply is required for neon message waiting indicators). Supports on-premises wiring... Compare
Quick view TN778 Packet Control (R6 and earlier) CALL 888-832-4789 The TN778 interfaces the packet bus with the Switch Processing Element (SPE) and terminates LAPD links. The TN778 supports packet bus signaling for ISDN D-channel signaling for ASAI applications and for packet bus maintenance. Packet bus signaling occurs... Compare
Quick view TN777B Network Controller (R6 and earlier) CALL 888-832-4789 The TN777B communicates control channel messages between the Processor circuit pack and the distributed network of port circuit packs on the Time Division Multiplexing (TDM) bus. The circuit pack also controls the four data channels that process and... Compare
Quick view TN776 Expansion Interface (for R6 or earlier si) CALL 888-832-4789 The TN776 connected to the Time Division Multiplexing (TDM) bus in one Port Network (PN) is an interface between that PN and the TDM bus extended to another PN. The TN776 packages the TDM control channel with Link Access Procedure on the D-channel (LAPD)... Compare
Quick view TN772 Duplication Interface CALL 888-832-4789 The TN772 selects the active processing element (control complex) in high reliability and critical reliability systems and coordinates the interchange of processing elements. The TN772 controls the memory shadowing function with the duplication option,... Compare
Quick view TN771D Maintenance Test Card CALL 888-832-4789 The TN771D performs maintenance functions. These functions include packet bus reconfiguration (allows diagnosis and correction of recoverable packet bus failures before the LAPD links fail) . LAPD provides data transfer between two devices and error and... Compare
Quick view TN768 Tone Clock CALL 888-832-4789 The TN768 supplies timing, including Stratum 4 timing, to the Port Network (PN). It produces the following tones: call progress, touch tones, answer-back, and trunk transmission test. The TN768 has 2 MHz, 160 kHz, and 8 kHz clocks. The TN768 can transmit... Compare
