Electrical STM-1 interface
The following table lists some parameters and the End of Life power budget of the
155-Mbit/s electrical interface unit:
Unit
Value
Application
intra-office
SDH Level
type
STM-1
Transmission rate
kbit/s
155,520 ± 20 ppm
Line coding
type
Coded Mark Inversion (CMI, G.703-12.1)
Impedance
Ω
75
Return Loss
(8 ... 240 MHz.)
dB
15
Maximum cable attenuation (78 MHz)
dB
12.7
Tributary interfaces
•
STM-1 tributary interface at 155 Mbit/s according to G.957 via SFP. The 155
Mbit/s optical access is done with a LC connector type.
•
STM-1 tributary interface at 155 Mbit/s according to the ITU G703-15 via SFP.
The STM-1e SFPs use the DIN 1.0/2.3 type connectors.
•
STM-4 tributary interface at 622 Mbit/s according to G.957 via SFP. The 622
Mbit/s optical access is realized with a LC connector type.
•
Interface at 1.544 Mbit/s ± 130 ppm, AMI or B8ZS encoded (programmable in
groups of 8) and conforming to G.703-2 standard 1991, asynchronously mapped via
VC-11 to a TU-12. The 1.5 Mbit/s electrical (DS1) interface access is via a RJ45
connector suitable for symmetrical twisted pair cables with an impedance of 100
Ω
.
•
Interface at 2.048 Mbit/s ± 50 ppm, HDB3 coded and conforming to G.703
standard 1991, asynchronously mapped via a VC-12 in TU-12. The 2 Mbit/s
electrical (E1) interface access is via RJ45 connector suitable for symmetrical
twisted pair cables either with an impedance of 120
Ω
or coaxial cables with an
impedance of 75
Ω
.
Each 2 Mbit/s tributary interface (optional card) can be operated in ISDN PRI
(Primary Rate Interface) or Leased-Line mode. It allows to transmit “30 B+D”
according to G.962 and I.431. This feature requires the processing of the overhead
contained in timeslot 0 (TS0) of the 2 Mbit/s signal.
•
Interface at 34.368 Mbit/s ± 20 ppm, HDB3 encoded and conforming to G.703-8
October 1998, asynchronously mapped into LO-VC3. The 34 Mbit/ s electrical
clear channel (E3) interface access is via a coaxial female DIN 1.6/5.6 type
connector with an impedance of 75
Ω
.
•
Interface at 44.736 Mbit/s ± 20 ppm, B3ZS encoded and conforming to G.703-6
October 1998, directly mapped in a LO-VC3. The 45 Mbit/s electrical tributary
(DS-3) interface access is via a coaxial female DIN 1.6/5.6 type connector with an
impedance of 75
Ω
.
Product description
System specifications
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365-312-847R4.0
Issue 4, November 2006
Lucent Technologies - Proprietary
See notice on first page
2-41