Technical data

Release 5.0.x Turin Networks Page 5-1
5.1 Electrical Interfaces
5.1.1 DS3/EC1
The DS3/EC1 Tributary Shelf supports both DS3 and EC-1 electrical signals on the same card (DS3/EC1
PLM). The customer cables are terminated on the rear of the DS3/EC1 Tributary Shelf with separate BNC
connectors for each direction of transmission. Refer to Table 5-1 for electrical specifications for these
inputs.
5.1.2 DS1
The ETS2 supports DS1 electrical interfaces. The customer cables are terminated on the rear of the shelf
using 64-pin Champ connectors for each direction of transmission. Refer to Table 5-1 for electrical specifi-
cations for these inputs.
Table 5-1 DS3/EC-1 Electrical Specifications
Parameter DS3 EC-1
Bit Rate 44.736 Mbps
+/- 20 ppm
51.840 Mb/s
+/- 20 ppm
Line Coding Bipolar with 3 Zero Substitution code
(B3ZS)
Bipolar with 3 Zero Substitution code
(B3ZS)
Impedance 75 Ohms +/-15% 75 ohms +/– 1.5%
Cable 735A or equivalent unbalanced coaxial
line
735A or equivalent unbalanced coaxial
line
Reach 220 feet to DSX-3 with 735 coaxial
cable,
450 feet to DSX-3 with 734 coaxial
cable.
220 feet to DSX-3 with 735 coaxial
cable,
450 feet to DSX-3 with 734 coaxial
cable
Connection BNC BNC
Table 5-2 DS1 Electrical Specifications
Parameter DS1
Bit Rate 1.544 Mbps +/- 130 ppm
Line Coding Alternate Mark Inversion (AMI)
Bit 8 Zero Substitution (B8ZS)
Signal Format SF - Superframe with all ‘1’ signal
ESF - Extended Superframe
Impedance 100 Ohms +/-5%
Pulse Amplitude 2.4 -3.6 Vpp
Cable Bellcore specified balanced twisted pair, 100 ohm, ABAM
Reach 655 ft