Preliminary Data Sheet
October 2000
T7630 Dual T1/E1 5.0 V Short-Haul Terminator (Terminator II)
12
L Lucent Technologies Inc.
Feature Descriptions
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Two independent T1/E1 channels each consisting of
a T1/E1 short-haul line interface and a T1/E1 framer
with HDLC formatting on the facility data link inter-
face.
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Memory-mapped read and write registers.
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Maskable interrupt events.
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Hardware and software resets.
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Onboard software-selectable pseudorandom test
pattern generator and detector for line performance
monitoring.
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3-state outputs.
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Single 5 V ± 5% supply.
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Low power consumption: 750 mW max.
T1/E1 Line Interface Features
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Transmitter includes transmit encoder (B8ZS or
HDB3), pulse shaping, and line driver.
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Five pulse equalization settings for template compli-
ance at DSX cross connect.
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Receive includes equalization, digital clock and data
recovery (immune to false lock), and receive
decoder.
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CEPT/E1 interference immunity as required by
G.703.
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Transmit jitter <0.02 UI.
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Receive generated jitter <0.05 UI.
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Jitter attenuator selectable for use in transmit or
receive path. Jitter attenuation characteristics are
data pattern independent.
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For use with 100
DS1 twisted-pair, 120
E1
twisted-pair, and 75
E1 coaxial cable.
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Common transformer for transmit/receive.
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Analog LOS alarm for signals less than –18 dB for
greater than 1 ms or 10-bit to 255-bit symbol periods
(selectable).
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Digital LOS alarm for 100 zeros (DS1) or 255 zeros
(E1).
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Diagnostic loopback modes.
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Compliant with AT&T CB119(10/79);
ITU G.703(88), G.732(88), G.735-9(88),
G.823-4(3/93), I.431(3/93); ANSIT1.102(93), T1.
408(90); ETSI, ETS-300-166(8/93), TBR12(12/93, 1/
96), TBR13(1/96); TR-TSY-000009(5/86), TSY-
000170(1/93), GR-253-CORE(12/95), GR-499-
CORE(12/95), GR-820-CORE(11/94), GR-1244-
CORE(6/95).
T1/E1 Framer Features
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Framing formats:
— Compliant with T1 standards ANSIT1.231 (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.
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Framer line codes:
— DS1: alternate mark inversion (AMI); binary eight
zero code suppression (B8ZS); per-channel zero
code suppression; decoding bipolar violation
monitor; monitoring of eight or fifteen bit intervals
without positive or negative pulses error indica-
tion.
— 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.