Cisco ONS 15454 - Figure 2-17 LOOPE Access Single TAP; Figure 2-18 LOOPE Access Dual TAP; Figure 2-19 LOOPF Access Single TAP; Loopf

2-20
Cisco ONS SONET TL1 Command Guide, R6.0
Chapter 2 Procedures and Provisioning
2.2.9 Test Access Mode Definitions
Figure 2-17 LOOPE Access Single TAP
Figure 2-18 LOOPE Access Dual TAP
2.2.9.8 LOOPF
Loop F (LOOPF) splits both the A and B paths, connects the incoming line from the F direction to the
outgoing line in the F direction and connects this looped configuration to the FAD (Figure 2-19 and
Figure 2-20).
Note QRS is not supported on the ONS 15454, ONS 15327, and ONS 15310-CL. The connection will remain
as is. The ONS 15600 inserts AIS instead of QRS.
Figure 2-19 LOOPF Access Single TAP
102056
A
E
B
F
"Mapped"
AID
AID
Single TAP
QRS
61113
A
E
B
F
"Mapped"
AID
AID
Dual-FAD TAP
(2 times the bandwidth
of the circuit accessed)
BB
102055
A
E
B
F
"Mapped"
AID
AID
Single TAP
BB
QRS