Overview
The PEB 2084, Quadruple Transceiver for S/T Interfaces (QUAT-S), implements four wire S/T interfaces used to link voice/data digital terminals to PBX subscriber lines and PBX trunk lines to the public ISDN. The QUAT-S is an optimized device for PBX applications but can also be used in Hubs and Multiplexers. It can handle up to four S/T interfaces simultaneously. While each channel is independently useable as S or T interface.

FEATUREs
• Four full duplex (B1 + B2 + D) S/T interface transceivers, each equipped with the following
functions:
– Analog S/T interfaces fully according to the CCITT I.430, ETSI 300.012 and ANSI T1.605 standards.
– 192 kbit/s transmission rate
– Receive timing recovery
– Conversion between pseudo-ternary and binary codes
– Conversion between S/T and IOM-2 frame structures
– Activation / deactivation procedures, triggered by primitives received over the IOM-2 interface or by info received from the line (e.g. detection of INFO1)
– Access to S and Q bits of S/T interface
– Execution of test loops
– Loop length up to 1.5 km (point-to-point)
– Frame alignment in trunk applications with maximum wander of ±50µs
– Logical S/T interface functions identical to PEB 2081, SBCX, for line card applications.
– Analog S/T line transceivers identical to PEB 2081, SBCX.
• IOM-2 interface
• D-channel access control
• Support for JTAG boundary scan test
• 1µCMOS technology with low power consumption
• + 5 V power supply
• P-MQFP-44 package