2b1q U Interface Device

2b1q U Interface Device STLC5411 is a complete monolithic transceiver for ISDN Basic access data transmission on twisted pair subscriber loops typical of public switched telephone networks. The device is fully compatible with both ANSI T1.601-1988U.S. and CSE (C32-11) French specifications. It is in- tended also to comply with ETSI specification both in term of transmission performances and re- quested features. The equivalent of 160 kbit/s full-duplex transmis- sion on a single twisted pair is provided, accord- ing to the formats defined in the a.m. spec. Frames include two B channels,each of 64 kbit/s, one D channel of 16 kbit/s plus an additional 4 kbit/s M channel for loop maintenance and other user functions. 12 kbit/s bandwidth is reserved for framing. 2B1Q Line coding is used, where pairs of bits are coded into one of 4 quantum levels. This technique results in a low frequency spectrum (160 kbit/s turn into 80 kband), thereby reducing both line attenuation and crosstalk and achieving long range with low Bit Error Rates. The system is designed to operate on standard types of cable pairs including mixed gauges (26 AWG, 24 AWG and 22 AWG) including the 15 loops configuration specified by ANSI. Good noise margins are achieved even when bridged taps are present. On 26 AWG cable, the trans- mission range is in excess of 5.5 km (18 kft) in presence of crosstalk and noise as specified by ANSI standard. STLC5411 is designed to operate with Bit Error Rate near-end Crosstalk (NEXT) as specified in europeanETSI recommendation. By STMicroelectronics
STLC5411 's PackagesSTLC5411 's pdf datasheet

STLC5411 Pinout, Pinouts
STLC5411 pinout,Pin out
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