Verilink PRISM 3030 (34-00208.L) Product Manual - Manual (Page 48)

38 C HAPTER 3: O PERATION
DTE MLB
The T1 DTE maintenance loopback loops network data back toward the DTE at
the network interface. Data is also passed through to the network.
T1 DTE
Loop
The looping choices are as follows.
NONE
DTE loop not present.
LLB
The local loopback selection loops data received at the T1 DTE interface back
toward the T1 DTE. Data is also passed through to the network.
Slot X Port
Y Loop
Ports are indicated as Slot X/Port Y, where X = 2 or 3 and Y = A or B. The
looping choices for each port are as follows:
NONE
Port loop not present.
NEAR
A bidirectional fractional loop is set at the port interface.
SEND LOOP
A V.54 in-band loop code is transmitted to the far-end unit to force it into a NEAR
loop mode on the selected port.
SEND UNLOOP
Unloops the far-end unit.
BERT
Functions
The following menus offer selections for the BERT port, direction, and pattern
along with test results.
BERT Port
Selects the port to be tested. The NONE setting disables the BERT generator. The
NETWORK option tests all channels selected. The T1 DTE option tests all
channels associated with the T1 DTE port. Selecting a single port tests all the
channels associated with that port.
BERT Channel
Available only when BERT Port is set to Network. This allows selection of a
specific DS0 channel (1 to 24) to be tested. Only unassigned (idle) channels appear
as selections. If ALL is selected, the entire T1 bandwidth is tested. If IDLE is
selected, all unassigned channels are tested.
BERT Pattern
Specifies which pattern is transmitted toward the port being tested. The choices are
1 IN 8, 3 IN 24, ALT, CLEAR, QRSS, 63, 511, 2047, 2
15 −
1, 2
20 −
1, and 2
23 −
1.