Alcatel-Lucent 1850 TSS-320 Engineering Rules page 17

Introduction
............................................................................................................................................................................................................................................................
Electrical Multirate 100/1000 Mbs Ethernet Interface
SFP electrical interfaces are provided for 100/1000Mb/s Ethernet applications (on PP1GE
only). The system supports the full duplex (i.e., bidirectional) Ethernet interface for:
Twisted pair cable: Fast Ethernet interfaces featuring 100Mb/s data rate as specified in
•
IEEE 802.3, clauses 24-25 (100BASE-Tx)
Category 5 balanced cable: Gigabit Ethernet interface, supporting 1000Mb/s data rate
•
as specified in IEEE 802.3, clause 40 (1000BASE-T).
Note:
direction), each working at 250 Mb/s.
The maximum link length supported by 100BASE-T interface depends on the
•
characteristics of the cable used; minimum target is 100 m.
The maximum link length supported by 1000BASE-T interface with CAT 5 balanced
•
cable is > 100 m
RJ-45 connector is supported for RX/TX differential connectivity (MDI connectivity)
•
Standard load impedance to be considered for transmitter/receiver characteristics
•
evaluation is 100 ohms
When operating as 100BASE-T, an internal 4B/5B block coding is supported in order
•
to convert the 100 Mb/s data rae (at MII) to the 125-Mb/s line rate (at MDI)
No line coding block is supported when operating as 1000BASE-T.
•
............................................................................................................................................................................................................................................................
PN 8DG 08763 GAAA
Issue 1 March 2009
1000-Mb/s data rate is assumed to be split onto four pairs of cable (per
Signal Interface
1 - 5