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Inband Lpbk (DS1 only)—Inband loopback. Enables the inband loop-up or
loop-down code: loop-up (enabled) or loop-down (disabled).
AFA—Enables (yes) or disables (no) Automatic Frequency Adjustment. AFA
monitors the error rate detected by the CRC (cyclic redundancy check)
error-checking scheme of each of the DS1/E1 links (ports). It automatically disables
and re-enables a port when the error rate on that port is at a set level for a set
time.
Activation Rate—The CRC (cyclic redundancy check) BER (bit error rate) at which
AFA takes a link out of service based on the Activation Min.: 10
For further details about setting this parameter, see "Activation/Deactivation Bit
Error Rates" below. This parameter appears only when AFA is enabled.
Activation Min.—The period during which AFA monitors the link condition prior
to taking it out of service, in minutes: 1 to 15. This parameter appears only when
AFA is enabled.
Deactivation Rate—The CRC (cyclic redundancy check) BER (bit error rate) at
which AFA puts a link in service based on the Deactivation Min.: 10
10
-7
. For further details about setting this parameter, see "Activation/Deactivation
Bit Error Rates" below. This parameter appears only when AFA is enabled.
Deactivation Min.—The period during which AFA monitors the link condition
prior to putting it in service, in minutes: 1 to 15. This parameter appears only
when AFA is enabled.
Activation/Deactivation Bit Error Rates
Table 28 translates bit errors rates into the total number of errors for various time
periods. Use this table as a reference when you are selecting activation and
deactivation bit error rates for the AFA feature.
Table 28 Bit Error Rates Translated into Total Number of Errors
Bit
Error
Rate
Total Errors
(BER)
in 1 second
-4
10
15
-5
10
1.5
-6
10
0.15
10
-7
0.015
Group—The number of the group to which the ports belong.
Admin. Status—Administrative status: Out of Service or In Service.
Operation Status—Operation status: Response or No Response.
5 Select [13] Previous Menu to return to the DSI UNI Configuration menu.
6 Repeat steps 4 and 5 for any other DS1 or E1 ports that you want to configure.
Configuring the DS1 (or E1) UNI with IMA Modules
Total Errors
Total Errors
in 2
in 1 Minute
Minutes
900
1800
90
180
9
18
1
2
-4
, 10
-5
, 10
-4
, 10
Total Errors
Total Errors
in 5
in 15
Minutes
Minutes
4500
13500
450
1350
45
135
5
13
131
-6
, 10
-7
.
-5
-6
, 10
,
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