Nortel Networks 4500 Series - Manual (Page 39)

1000BASE-T SFP specifications 39
T1 SFP—default settings
The Ethernet Routing Switch 4500 Series switches automatically configure
the following T1 SFP parameters after the system powers up:
• Transmit Line Build Out (TLBO): set according to cable length.
•
Framed or Unframed: Insert framing word into the frame (1 bit per T1
frame) or do not insert framing word into the frame.
•
Line code: Binary 8 Zero Substitution (B8ZS) or Alternate Mark
Inversion (AMI).
•
Clock: Use Rx clock or internal clock for Tx clock (Nortel recommends
internal clock for Tx clock).
• Framing: D4 or Extended Super Frame (ESF), depends on the framing
word required by the T1 equipment at the far end.
Table 10
T1 SFP—default parameters
Parameter Default setting
TLBO 0 (0 ft–133 ft)
Framed or unframed 1 (framed)
Line code 0 (B8ZS)
Tx clock source 1 (Tx clock)
Framing 1 (ESF)
Rx sensitivity 1 (limited long haul)
Yellow alarm 0 (normal operation)
Fault propagation 0 (normal operation)
Tx disabled behavior 2 (Alarm Indications Signal—AIS)
Transmit AIS 0 (normal operation)
ATTENTION
The T1 SFP module must be configured to match the parameters of the T1
equipment at the far end. If you must change the parameters, contact Nortel
Technical Support.
1000BASE-T SFP specifications
The 1000BASE-T SFP provides Gigabit Ethernet connectivity using a
single eight-pin RJ-45 connector. The 1000BASE-T SFP only operates
at 1 gigabit per second (1 Gbit/s) and does not support 100BASE-T or
10BASE-T interfaces. The part number for this model is AA1419043-E6.
Nortel Ethernet Routing Switch 4500 Series
Installation — SFPs and XFPs
NN47205-301 02.01
20 October 2008
Copyright © 2007-2008 Nortel Networks
.