Features: Complete T1/DS1/ISDN-PRI/J1 Transceiver Functionality Complete E1 (CEPT) PCM-30/ISDN-PRI Transceiver Functionality User-Selectable TDM or UTOPIA II Bus Interface Long-Haul and Short-Haul Line Interface for Clock/Data Recovery and Waveshaping CMI Coder/Decoder for Optical I/F Crystal-Less...
DS2156: Features: Complete T1/DS1/ISDN-PRI/J1 Transceiver Functionality Complete E1 (CEPT) PCM-30/ISDN-PRI Transceiver Functionality User-Selectable TDM or UTOPIA II Bus Interface Long-Haul and Short-Haul L...
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The DS2156 is a software-selectable T1, E1, or J1 single-chip transceiver (SCT) for short-haul and long-haul applications. The backplane is user-configurable for a TDM or UTOPIA II bus interface. The DS2156 is composed of a line interface unit (LIU), framer, HDLC controllers, and a UTOPIA/TDM backplane interface, and is controlled by an 8-bit parallel port configured for Intel or Motorola bus operations. The DS2156 is pin andsoftware compatible with the DS2155.
The LIU is composed of transmit and receive interfaces and a jitter attenuator. The transmit interface DS2156 is responsible for generating the necessary waveshapes for driving the network and providing the correct source impedance depending on the type of media used. T1 waveform generation includes DSX-1 line buildouts as wellas CSU line buildouts of -7.5dB, -15dB, and -22.5dB. E1 waveform generation includes G.703 waveshapes for both 75Ω coax and 120Ω twisted cables. The receive interface provides network termination and recovers clock anddata from the network.