ADTRAN 1200410L2, User Manual

Page: 50 / 80

Chapter 5. Configuration Menu
50 ESU LT User Manual 61200410L2-1A
DTE TX Clock
Controls the clock used by the ESU LT to accept the transmit (TX)
data from the DTE. Most applications allow for this
to be set to
I
NTERNAL
. If the interface cable is long (causing a phase
shift in the data), the clock can be selected as
INT/INV
(Internal/
Inverted). This switches the phase of the clock, thus compensating for
a long cable.
The factory default setting for this option is
A
UTO
. The
A
UTO
DTE TX
CLK setting allows the ESU LT to automatically detect the delay from
the DTE device to the ESU LT and set the proper phase of the clock.
A
UTO
DTE TX CLK is not available in unframed mode.
This feature automatically selects between the
I
NTERNAL
and INT-INV
settings. If the DTE provides a clock with TX data, the clock selection
is set to
E
XTERNAL
. The ESU LT depends on an externally supplied
clock to accept the TX data.
Choices:
I
NTERNAL
;
I
NT
-I
NV
;
E
XTERNAL
;
A
UTO
Start TS0
Used to select the time slot in which the E1 data stream will start. In
CAS mode, time slot 16 may not be used as the starting time slot. This
option setting is ignored in unframed mode since all time slots are
automatically used.
Choices:
CCS
mode (all TS0s -
01
to
31
);
CAS
mode (all TS0s except
16
)
Number of TS0s
Used to select the number of time slots to be used. The DTE rate will
be this number times 56K or 64K, depending on the TS0 rate setting
(see
Appendix A, DTE Data Rate Chart , on page 67). This option
setting is ignored in unframed mode since all time slots are
automatically used.
Choices:
CCS
mode (
01
to
31
);
CAS
mode (
01
to
30
)