Constellation® January 2006
4-12 Technical Specifications
Tributary Interface
Tributary Signal Characteristics
Table 4-5: Line Interface Specifications
Tributary Jitter
• Jitter transfer conforms to AT&T Standard TR-62411.
• Jitter tolerance conforms to Bellcore Standard GR-499, Section 7.3.2.
• Jitter generation conforms to Bellcore Standard GR-499, Section 7.3.3.
• The DS1 interface meets the jitter transfer and jitter acceptance
requirements of ITU-T G.958 and Bellcore GR-253.
• Jitter curves are given in Chapter 7, “
Performance Curves
”.
Tributary Bit Rate
(Mbit/s)
Impedance/
Connector
Line
Code
Length
DS1 1.544 100 ohms/50-pin AMI/B8ZS 655 feet to DSX-1
E1 2.048 120 ohms/50-pin HDB3 6 dB at 1.024 MHz
DS3 44.736 75 ohms/BNC female B3ZS 450 feet to DSX-3
E1 (wayside) 2.048 75 ohms/BNC female
or 120 ohms/RJ-45
HDB3 6 dB at 1.024 MHz
DS1 (wayside) 1.544 100 ohms/RJ-45 AMI/B8ZS 655 feet to DSX-1
OC-3/STM-1o 155.52 SC connector NRZ See
Table 4-6
STS-3/STM-1e 155.52 75 ohms/BNC female CMI 100 meters
Table 4-6: Detailed Optical Specifications
OC-3, OC3c, STS3: Single-Mode Multi-Mode
Transmit Level -8 to -15 dBm -14 to -19 dBm
Receive Level -7 to -34 dBm -14 to -30 dBm
Center Wavelength 1300 nm 1300 nm
Path Length Up to 15 km Up to 1 km
Compliance Bellcore (SONET OC3/IR-1)
and ITU-T G.957 STM1/S.1.1
FDDI PMD ATM/SONET
standards