Alcatel-Lucent 7750 Configuration Manual page 669

FEC Mode
Data Rate
Cfg Alarms and
Alarm Status
SF/SD Method
SF Threshold
SD Threshold
SM-TTI Tx
(<mode>)
SM-TTI Rx
FEC Corrected 0s
FEC Corrected 1s
7750 SR Interface Configuration Guide
Label
Type of FEC (Forward Error Correction) in effect: g709, enhanced or
disabled. When g709 is selected, the standard FEC method is used. When
enhanced is selected, a proprietary FEC algorithm is used that extends
optical reach in long haul applications. When disabled the bytes that are
reserved for FEC in the OTU frame are transmitted as zeros and the FEC
decoder is bypassed, but OTU framing is still in effect.
This indicates the data rate at which the port is operating. When OTU is
encapsulating 10-Gigabit Ethernet WAN, the data rate is 10.709 Gb/s, the
G.709 standard OTU2 data rate. When OTU is encapsulating 10-Gigabit
Ethernet LAN, the data rate is either 11.049 Gb/s or 11.096 Gb/s, depending
on the otu2-lan-data-rate configuration parameter of the port's OTU
parameters. These data rates (11.049 Gb/s and 11.096 Gb/s) are considered
OTU2e data rates that are non-standard or over-clocked with respect to
G.709, but have become widely used in optical networking to transport un-
altered 10-Gigabit Ethernet LAN payloads.
This indicates the alarms that shall be reported when raised or cleared.
Alarms that are not in this list will not be reported when they are raised or
cleared but will appear in the Alarm Status.
This indicates the selected method for declaring the SF (Signal Fail) or SD
(Signal Degrade) alarm. When BIP8 is selected, the error rate of SM-BIP8
errors in the OTU frames is used to declare SF or SD (This is very similar to
SONET SF/SD which uses a rate of B2 errors). When FEC is selected, the
rate of corrected bits is used to declare SF or SD. This effectively indicates
that the link would be degraded (SD) or failed (SF) if FEC was disabled and
gives the user an early warning that the link is degrading or is about to fail.
This is the configured error rate threshold at which the SF (Signal Fail)
alarm will be raised.
This is the configured error rate threshold at which the SD (Signal Degrade)
alarm will be raised.
This is the configured SM-TTI (Section Monitor Trail Trace Identifier) to be
transmitted by this port in the OTU overhead bytes. The modes are auto,
string, or bytes. In the auto and string modes, a printable character string
will be displayed. In bytes mode, up to 64 hex bytes will be displayed
This is the SM-TTI (Section Monitor Trail Trace Identifier received by this
port. When the received TTI is a printable string of characters, it will be
displayed as a text string. When the received TTI contains one or more non-
printable characters, it will be displayed at a sequence of 64 hex bytes.
When the received TTI is all zeros, the string "Not Specified" will be
displayed.
Displays the number of bits that were received as 0s but corrected to 1s.
Number of bits that were received as 1s but corrected to 0s.
Interface Configuration
Description (Continued)
Page 669