Verilink PRISM 3111 (34-00242) Product Manual - Manual (Page 38)

30 C HAPTER 3: F RONT P ANEL I NTERFACE
timing. Set the T1-NET Timing to Internal when this loop is enabled. Options
include None, LpUp and LpDn.
T1 DTE Loops This menu allows you to run diagnostic loop tests on the T1 DTE.
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.
Options include None, LpUp and LpDn.
DTE LLB
The T1 DTE LLB command loops data received at the T1 DTE interface back
toward the T1 DTE (all DS0s are returned to the T1 DTE port). The T1 DTE data
is also passed to the network.Options include None, LpUp and LpDn.
Port 1 Loops This menu option allows you to run diagnostic loop tests on Port 1 from the
network back to the network and data from the DTE back to the DTE by
transmitting an inband V.54 fractional loop code toward the network in the port’s
bandwidth (Figure 3-14). You may run loop test on both the near and far end units.
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
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
T1 DTE
LLB
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