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TFRA08C13 Datasheet(PDF) 10 Page - Agere Systems |
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TFRA08C13 Datasheet(HTML) 10 Page - Agere Systems |
10 / 188 page Preliminary Data Sheet TFRA08C13 OCTAL T1/E1 Framer October 2000 10 Lucent Technologies Inc. Lucent Technologies Inc. Feature Descriptions T1/E1 Framer Feature Descriptions s Framing formats: — Compliant with T1 standards ANSI T1.231 (1993), AT&T TR54016, AT&T TR62411 (1998). — Unframed, transparent transmission in T1 and E1 formats. — DS1 extended superframe (ESF). — DS1 superframe (SF): D4; SLC-96; T1DM DDS; T1DM DDS with FDL access. — DS1 independent transmit and receive framing modes when using the ESF and D4 formats. — Compliant with ITU CEPT framing recommenda- tion: 1. G.704 and G.706 basic frame format. 2. G.704 Section 2.3.3.4 and G.706 Section 4.2: CRC-4 multiframe search algorithm. 3. G.706 Annex B: CRC-4 multiframe search algo- rithm with 400 ms timer for interworking of CRC-4 and non-CRC-4 equipment. 4. G.706 Section 4.3.2 Note 2: monitoring of 915 CRC-4 checksum errors for loss of frame state. s Framer line codes: — DS1: alternate mark inversion (AMI); binary eight zero code suppression (B8ZS); per-channel zero code suppression; decoding bipolar violation mon- itor; monitoring of eight or fifteen bit intervals with- out positive or negative pulses error indication. — DS1 independent transmit and receive path line code formats when using AMI/ZCS and B8ZS coding. — ITU-CEPT: AMI; high-density bipolar 3 (HDB3) encoding and decoding bipolar violation monitor- ing, monitoring of four bit intervals without positive or negative pulses error indication. — Single-rail option. s Signaling: — DS1: extended superframe 2-state, 4-state, and 16-state per-channel robbed bit. — DS1: D4 superframe 2-state and 4-state per- channel robbed bit. — DS1: SLC-96 superframe 2-state, 4-state, 9-state, and 16-state per-channel robbed bit. — DS1: channel-24 message-oriented signaling. — ITU CEPT: channel associated signaling (CAS). — Transparent (all data channels). s Alarm reporting, performance monitoring, and main- tenance: — ANSI T1.403-1995, AT&T TR 54016, and ITU G.826 standard error checking. — Error and status counters: 1. Bipolar violations. 2. Errored frame alignment signals. 3. Errored CRC checksum block. 4. CEPT: received E bit = 0. 5. Errored, severely errored, and unavailable seconds. — Selectable errored event monitoring for errored and severely errored seconds processing with programmable thresholds for errored and severely errored second monitoring. — CEPT: Selectable automatic transmission of E bit to the line. — CEPT: Sa6 coded remote end CRC-4 error E bit = 0 events. — Programmable automatic and on-demand alarm transmission: 1. Automatic transmission of remote frame alarm to the line while in loss of frame alignment state. 2. Automatic transmission of alarm indication signal (AIS) to the system while in loss of frame alignment state. — Multiple loopback modes. — Optional automatic line and payload loopback acti- vate and deactivate modes. — CEPT nailed-up connect loopback and CEPT nailed-up broadcast transmission TS-X in TS-0 transmit mode. — Selectable test patterns for line transmission. — Detection of framed and unframed pseudorandom and quasi-random test patterns. — Programmable squelch and idle codes. s System interface: — Autonomous transmit and receive system inter- faces. — Independent transmit and receive frame synchro- nization input signals. — Independent transmit and receive system interface clock. — 2.048 Mbits/s, 2.048 MHz concentration highway interface (CHI) default mode. — Optional 4.096 Mbits/s and 8.192 Mbits/s data rates. — Optional 4.096 MHz and 8.192 MHz frequency system clock. — Programmable clock edge for latching frame syn- chronization signals. — Programmable clock edge for latching transmit and receive data. — Programmable bit and byte offset. — Programmable CHI master mode for the genera- tion of the transmit CHI FS from internal logic with timing derived from the receive line clock signal. s Digital phase comparator for clock generation in the receive and transmit paths. |
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