ADTRAN MX2800 User Manual page 40

Chapter 3. Configuration
Timing
In most cases, configure the MX2800 for L
timing from the network. However, set to L
the master timing source for the circuit, or set to E
MH
to the
Remote Loopbacks
Enabling this option allows the MX2800 to respond to remote
loopback requests received over the DS3 Far End Alarm and
Control (FEAC) channel when operating in C-bit parity mode.
When disabled, all loopback requests are ignored.
XCV Threshold
The XCV (excessive code violations) T
accepted by the unit before it switches controller cards. If set to
D
controller cards. The threshold limits are described in the following
chart:
Setting
3-4
if timing is derived from an external device that is connected
Z
port.
EXT CLK
, code violations will not cause the unit to switch
ISABLED
The unit switches controller cards if...
-3
1E more than one out of every 1,000 bits received on the
DS3 contains a code violation.
-4
1E more than one out of every 10,000 bits received on the
DS3 contains a code violation.
-5
1E more than one out of every 100,000 bits received on
the DS3 contains a code violation.
-6
1E more than one out of every 1,000,000 bits received on
the DS3 contains a code violation.
MX2800 User Manual
timing to derive
OOP
if the MX2800 is
OCAL
XTERNAL
sets a limit on CVs
HRESHOLD
61200290L1-1
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