Verilink PRISM 3111 (34-00242) Product Manual - Manual (Page 63)

Element Maintenance 55
You can activate a NET LLB on the remote end unit through this selection or
through the front panel TEST switch (if configuration Switch S1-7 is set to Inband
LLB).
Net MLB (Maintenance Loopback) - The NET MLB command loops data at the T1 DTE
port back toward the network (passes network data to the DTE and returns data to
the network). The MLB affects only network channels assigned to the T1 DTE.
DTE MLB The T1 DTE MLB command loops all network data back toward the DTE ports at
the network interface. Data is passed through to the network. Set the T1 NET
Timing to Internal when this loop is enabled.
Network Interface Framer/Deframer
Framer/
Deframer
Multiplexor Receivers/Drivers
Receivers/
Drivers
BERT Generator/
Detector
From
Ports
To
Net
From
NET
To
Ports
From
NET
To
NET
DTE (DSX1)
(100' max.)
DTE Data Port
RJ-48C
RJ-48C
DSX1, 1'-655'
to cross-connect
1
2
4
5
4
5
1
2
To Network
From Network
NET
LLB
AIS
Netw
or
k Data
DTE
MLB
Network Interface Framer/Deframer
Framer/
Deframer
Multiplexor Receivers/Drivers
Receivers/
Drivers
BERT Generator/
Detector
From
Ports
To
NET
From
NET
To
Ports
From
NET
To
NET
DTE (DSX1)
(100' max.)
DTE Data Port
RJ-48C
RJ-48C
DSX1, 1'-655'
to cross-connect
1
2
4
5
4
5
1
2
To Network
From Network
Network Interface Framer/Deframer
Framer/
Deframer
Multiplexor Receivers/Drivers
Receivers/
Drivers
BERT Generator/
Detector
From
Ports
To
Net
From
NET
To
Ports
From
NET
To
NET
DTE (DSX1)
(100' max.)
DTE Data Port
RJ-48C
RJ-48C
DSX1, 1'-655'
to cross-connect
1
2
4
5
4
5
1
2
To Network
From Network
DTE
MLB