TXC04252 mapper equivalent, qe1m device quad e1 mapper.
* Add/drop four 2.048 Mbit/s signals from STM-1/VC-4, STS-3/AU-3 or STS-1 buses
* Independent add and drop bus timing modes
* Selectable HDB3 positive/negativ.
Four E1 2.048 Mbit/s signals are mapped to and from asynchronous Tributary Unit-12 (TU-12) or Virtual Tributary 2 (VT2).
The Quad E1 Mapper device is designed for add/drop multiplexer, terminal multiplexer, and dual and single unidirectional ring applications. Four E1 2.048 Mbit/s signals are mapped to and from asynchronous Tributary Unit-12 (TU-12) or Virtual Tributar.
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