Chapter 3. Configuration
3-4
MX2800 User Manual
61200290L1-1
Timing
In most cases, configure the MX2800 for
L
OOP
timing to derive
timing from the network. However, set to
L
OCAL
if the MX2800 is
the master timing source for the circuit, or set to
E
XTERNAL
44.736
MH
Z
if timing is derived from an external device that is connected
to the
EXT CLK
port.
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
HRESHOLD
sets a limit on CVs
accepted by the unit before it switches controller cards. If set to
D
ISABLED
, code violations will not cause the unit to switch
controller cards. The threshold limits are described in the following
chart:
Setting
The unit switches controller cards if...
1E
-3
more than one out of every 1,000 bits received on the
DS3 contains a code violation.
1E
-4
more than one out of every 10,000 bits received on the
DS3 contains a code violation.
1E
-5
more than one out of every 100,000 bits received on
the DS3 contains a code violation.
1E
-6
more than one out of every 1,000,000 bits received on
the DS3 contains a code violation.
Summary of Contents for TOTAL ACCESS MX2800
Page 8: ...viii MX2800 User Manual 61200290L1 1...
Page 16: ...List of Tables xvi MX2800 User Manual 61200290L1 1...
Page 100: ...Chapter 7 Circuit and Network Redundancy 7 6 MX2800 User Manual 61200290L1 1...
Page 106: ...Chapter 8 Power Loss Recovery 8 6 MX2800 User Manual 61200290L1 1...
Page 110: ...Appendix A Pinouts A 4 MX2800 User Manual 61200290L1 1...
Page 114: ...Appendix B Specifications Summary B 4 MX2800 User Manual 61200290L1 1...
Page 130: ...Appendix D Glossary D 12 MX2800 User Manual 61200290L1 1...
Page 140: ...Index Index 10 MX2800 User Manual 61200290L1 1...
Page 142: ......