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• Up to 8 independent T3 or E3 ports configurable as either T3 or E3
• Full-duplex connectivity at T3 rate (44.736 MHz) or E3 rate (34.368 MHz)
• Subrate and scrambling support of Quick Eagle Networks (formerly Digital Link), Larscom, ADC Kentrox, Adtran, and Verilink DSUs
• Internal or network clock selectable per channel
• Line and payload loopback capabilities:
◦ Local and remote loopback at the T3 level
◦ Response to embedded loopback commands
◦ Insertion of loopback commands into transmitted signal
• Bit-error-rate-testing (BERT) pattern generation and detection per channel
◦ Selectable pseudorandom pattern up to 32 bits long, including all 0’s, all 1’s, 215, 220, 220 Quasi-Random Signal Sequence (QRSS), 223, and alternating 0’s and 1’s
◦ 32-bit error-count and bit-count registers
◦ Fully independent transmit and receive sections
◦ Detection of test patterns with bit error rates up to 10-2
• 24-hour history maintained for error statistics and failure counts, at 15-minute intervals
• 16- and 32-bit cyclic redundancy check (CRC); 16-bit default
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