Summary

THIS PRODUCT IS MANUFACTURING DISCONTINUED AND IS NO LONGER AVAILABLE FROM TRANSWITCH CORPORATION. ADVANCED TRANSWITCH PRODUCTS WITH ENHANCED FEATURES ARE OFTEN AVAILABLE. FILES ARE PROVIDED FOR SUPPORT PURPOSES ONLY.


The QE1F-Plus is a four-channel E1 (2048 kbit/s) framer designed for voice and data communications applications. A dual unipolar or NRZ line interface is supported with full alarm detection and generation per ITU-T G.703. The transmit and receive sections of each of the four framers are independent, with individual two-frame slip buffers, which allows operation with a wide range of switching and transmission products. Framing algorithm support for ITU-T G.704, G.706 and ETS 300-011. Access and control for signaling and data are provided via a Motorola/Intel-compatible microprocessor interface. For HDLC link applications, each framer supplies a full duplex HDLC controller in addition to on-board latching of all required performance parameters; minimal software overhead is required. Diagnostic, test, and maintenance functions are provided, including E1 local and remote loopbacks, time slot loopbacks and boundary scan (IEEE 1149.1).

Features

• Offline framer supports Standard and Frame Hold-Off frame alignment with CRC-4 multiframe check and selectable out of frame criteria, and transparent non-framing mode
• Frame alignment detection and loss of frame alignment declaration comply with ITU-T G.706
• Dual unipolar (HDB3/AMI) or NRZ line interface
• Two-frame slip buffers in both receive and transmit directions
• Supports Channel Associated Signaling in Time Slot 16
• Detects and forces RAI and AIS alarms; detects OOF and CFA framing conditions
• HDLC processing using national bits in Time Slot 0 (up to 20 kbit/s)
• Detects, counts and forces line code errors (BPVs), CRC-4 errors, and frame bit errors
• System Interfaces
  • 2 Mbit/s, 8 Mbit/s and 16 Mbit/s Transmission Modes with gapped clock option for 2 Mbit/s
  • 2 Mbit/s MVIP Mode, 8 Mbit/s H-MVIP Mode / H.100 Mode and 16 Mbit/s PCM Highway Mode with gapped clock option for 2 Mbit/s MVIP
• Motorola/Intel-compatible microprocessor interface
• One-second interrupt input latches counter values and line events into shadow registers
• Local and remote line loopbacks
• Boundary scan capability (IEEE 1149.1)
• Single +3.3 or +5 V, +/-5 % power supply
• 128-pin low profile plastic quad flat package