29
Echo 2 Mbps Multiplexer
TECHNICAL: 0118 931 2233
Diagnostics & Loopbacks
A number of debug options are available. They are described in the table on page 13. It is
possible to loop back any channel bi-laterally (both locally and remotely), to allow data to be
tested for proper operation.
Care should be taken when using
external
clocks, to either provide the master clock
reference, or simply clock data.
A useful indication of a clock failure is provided by the message '
CLK??
' appearing to the
right of the channel rate, as shown below. This indicates that the required external clock is
either running too slow (or not at all) or too fast for the channel rate selected. If internal
clock is selected, this message should not appear.
2 MEGABIT E1 MULTIPLEXER V1.00
=============================== 15:35 16/09/96 ==================================
Main Link (EUR)
: SYNCHRONISED
Mode
: NORMAL * Nx64 Channels
: 4
Framing
: CRC4 D&I Channels
: 1
Idle Bandwidth
: 320K System Alarms
: None
Clock Reference
: INTERNAL Statistics
: Error Counts
Configuration
: >LOCAL Events
: Log
Nx64 Channel
: 1 2 3 4
Rate
: 384K 256K
CLK?
OFF OFF
Mode
: NORMAL NORMAL NORMAL NORMAL
TX Clock
: INT EXT INT INT
RX Clock
: INT EXT INT INT
Indicate
: ON ON ON ON
---------------------- TIMESLOT MAP --------------------------
0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
---------------------------------------------------------------
R 2 2 1 1 2 2 1 1 1 1 - - - - - D D D D D D D D D D D D D D D D
Cursor Keys to move, CTRL-U to save, ESC to abandon
=================================================================================
Use <SPACEBAR>/<+>/<-> to select
