Maintenance Description
9-4 Issue 8.0 July 2002
Figure 9-1. FT-2000 OC-48 Add/Drop-Rings Terminal Maintenance
Signals (When Interfacing with DS3 Signals)
DS3 AIS
DS3
TRMTR
OC-48
DS3
FT-2000
DS3
OC-48
DS3
RCVR
Line AIS*
DS3 AIS*
TRMTR
OC-48
DS3
FT-2000
DS3
OC-48
DS3
FT-2000
FT-2000
RCVR
TRMTR
DS3 AIS
Incoming OC-48 LOS or LOF
FT-2000
DS3
OC-48
DS3
RCVR
TRMTR
STS
LOP
DS3 AIS
RCVR
DS3 AIS
TRMTR
OC-48
DS3
FT-2000
STS LOP
Incoming STS LOP
DS3 LOF
DS3
Incoming DS3 LOF
DS3
FT-2000
TRMTR
RCVR
RCVR
DS3 AIS
TRMTR
DS3
FT-2000
DS3
OC-48
DS3
AIS
Incoming DS3 AIS
(from cross-connect)
Embedded
DS3 AIS
DS3
AIS
DS3
LOF
Unprotected DS3
Circuit Pack Failure
STS-Path
AIS
LOS or
LOF
Unprotected OC48 TRMTR
Circuit Pack Failure
Unprotected OC48 RCVR
Circuit Pack Failure
DS3 AIS
DS3
RCVR
DS3
RCVR
TRMTR
STS-Path
AIS*
STS-Path
AIS
DS3
FT-2000
TRMTR
RCVR
RCVR
DS3 AIS
TRMTR
DS3
FT-2000
DS3
OC-48
DS3
AIS
Incoming DS3 LOS
Embedded
DS3 AIS
DS3
AIS
DS3
LOS
Provisioned for VMR, VM, or CC with DS3 AIS operation. If the terminal is
provisioned for CC without DS3 AIS, the failed signal will be transmitted as is.
Provisioned for VMR or VM operation.
* If possible. In the FT-2000 OC-48 Add/Drop-Rings Terminal, the TRMTR circuit pack will disable its output when it fails.
RDI-P
RDI-P
RDI-L
RDI-P
RDI-P
RDI-P
RDI-L
RDI-P