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Table 3-3. DSX-1 Interface Port Configuration Selections (Continued)
Selection
F
RAMING
L
C
INE
ODING
L
L
INE
ENGTH
DSX-1 T
IMING
S
OURCE
A
S
PPLY
ETTINGS
61200217L1-1
Description
Select the framing format for each individual DSX-1 interface. The
ESF
default setting is
. Select
Extended Superframe framing. Select
configured for D4 framing. Select
the framing type (ESF or D4) automatically. When in A
selected interface toggles between ESF and D4 approximately every ten
seconds until it detects valid framing.
Note: D4 is equivalent to superframe format (SF).
Set the line code for each individual DSX-1 interface to match the
connected DTE device. Three choices are available: B8ZS, AMI, and
AMI
/
(AMI coding with bit stuffing).
W
STUFFING
Set the line length for each DSX-1 interface according to the distance
from the T3SU 300 to your DTE device. Set to 7.5 dB if the attached DTE
device only supports DS-1 levels.
For each Quad DSX-1 card pair (the near- and far-end Quad DSX-1
cards), there must be only one source of timing. The available timing
sources are described below:
DS3
: The timing for both the near- and far-end Quad DSX-1 cards is
derived from the DS3 interface. All DTE devices connected to the
DSX-1 interfaces must be slave timed since both cards source the timing
reference derived from the DS3. Both the near- and far-end units must
be set to DS3.
R
: The timing source for the Quad DSX-1 card is derived from
EMOTE
the far-end Quad DSX-1 card. Use this mode if the far-end card has a
DSX-1 T
S
IMING
OURCE
or DSX-1 #4.
DSX-1 #
(x is 1,2,3, or 4): The timing source for the Quad DSX-1 pair
X
is derived from one of the four DSX-1 interfaces. When configured in this
manner, one of the DSX-1 interfaces is slaved to the DSX-1 interface
from your DTE. The remaining three DSX-1 interfaces, if enabled,
source the timing as derived from the slaved port. The far-end DSX-1
interface must be configured for R
Note: If more than one Quad DSX-1 card is installed, each card can
have a different timing source configuration.
Select this field after making all configuration changes for the selected
port. The changes are then applied to the unit immediately.
T3SU 300 User Manual
ESF
if your DTE device is configured for
D4
if your DTE device is
A
to allow the interface to detect
UTO
configuration of DSX-1 #1, DSX-1 #2, DSX-1 #3,
.
EMOTE
Chapter 3. Configuration
mode, the
UTO
3-11
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