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Framing
Coding
Timing
CRC4 Mode
3-6
W A N s u i t e 5 2 6 0 / 5 2 3 0
Selects the framing for the network side of the DSU/CSU.
Values
CCS, CAS, Unframed
Default: CCS
Sets the network side line coding.
Values: HDB3, AMI
Default: HDB3
Sets the timing source to synchronize the unit's internal timing generators. In
all cases, slips are controlled to occur on frame boundaries at the Network
ports when timing synchronization is lost. The options are as follows:
Network 1 (5260)
"Function" parameter (on the Network 2 screen) in "Slaved" mode − Internal,
Network 1, Network 2, Serial 1, Serial 2
"Function" parameter (on the Network 2 screen) in Network mode − Internal,
Network 1, Serial 1
Network 2 (5260)
"Function" parameter in "Slaved" mode − timing parameter is ignored in
Slave mode
"Function" parameter in Network mode− Internal, Network 2, Serial 2
Network (5230) − Internal, Network, Serial
Definitions of the timing sources are as follows:
Internal – The unit's internal frequency standard (E1 2.048 Mbps ± 50 bps)
is used for all timing.
Network 1, Network 2, Network – Timing is derived from the Network port
recovered clock.
Serial 1, Serial 2, Serial – Timing is derived from the Serial port recovered
clock.
Provides line integrity detection to determine if bit errors are present on the
line.
Values: Disable, Enable
Default: Disable
Error Status and Alarm Thresholds Table
The unit can be programmed to generate an alarm condition based on a
specific level of performance degradation. The Network screens present a
table that provides current error status and alarm threshold information.
Acceptable alarm thresholds are set for periods of 15 minutes (900 seconds)
and sampled every second. The error types listed in the following paragraphs
can be preset to a value between 0 and 900 seconds. Setting a field to "0"
(zero) disables the alarm on that statistic. To effectively disable alarm
reporting, set all fields to "0" (zero).
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