ADTRAN 1200218L1, User Manual

Page: 47 / 122

Chapter 3. Configuration
61200663L1-1 OSU 300 User Manual 3-9
F
RAMING
Select the framing format for each individual DSX-1 interface. The
default setting is
ESF
. Select
ESF
if your DTE device is configured
for Extended Superframe framing. Select
D4
if your DTE device is
configured for D4 framing. Select
A
UTO
to allow the interface to
detect the framing type (
ESF
or
D4
) automatically. When in
A
UTO
mode, the selected interface toggles between
ESF
and
D4
approximately every ten seconds until it detects valid framing. Note:
D4 is equivalent to superframe format (SF).
L
INE
C
ODING
Set the line code for each individual DSX-1 interface to match the
connected DTE device. Three choices are available:
B8ZS
,
AMI
,
and
AMI
W
/
STUFFING
(AMI coding with bit stuffing).
L
INE
L
ENGTH
Set the line length for each DSX-1 interface according to the distance
from the OSU 300 to your DTE device. Set to 7.5 dB if the attached
DTE device only supports DS-1 levels.
DSX-1 T
IMING
S
OURCE
For each Quad DSX-1 card pair (the near-end 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-end 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 units must be set to DS3.
R
EMOTE
The timing source for the Quad DSX-1 card is derived
from the far-end Quad DSX-1 card. Use this mode if the
far-end card has a
DSX-1 T
IMING
S
OURCE
configuration of
DSX-1 #1
,
DSX-1 #2
,
DSX-1 #3
, or
DSX-1 #4
.
DSX-1 #
X
The timing source for the Quad DSX-1 pair 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
EMOTE
. Note: If more
than one Quad DSX-1 card is installed, each card can
have a different timing source configuration.
A
PPLY
S
ETTINGS
Select this field after making all configuration changes for the
selected port. The changes are then applied to the unit immediately.
Table 3-3. DSX-1 Interface Port Configuration Selections (Continued)
S
ELECTION
D
ESCRIPTION