bert pattern
To enable a bit error rate test (BERT) pattern on a T3/E3 or T1/E1 line or an individual channel group, use
the
bert pattern
command in T3, E3, T1, E1, or channel group configuration mode. To disable a BERT
pattern, use the
no
form of this command.
bert pattern
{
0s| 1in8| 1s| 2^11| 2^15| 2^20| 2^20-QRSS| 2^23| 2^9| 3in24| 55Daly| 55Octet| alt-0-1|
ds0-1| ds0-2| ds0-3| ds0-4
}
no bert pattern
{
0s| 1in8| 1s| 2^11| 2^15| 2^20| 2^20-QRSS| 2^23| 2^9| 3in24| 55Daly| 55Octet| alt-0-1|
ds0-1| ds0-2| ds0-3| ds0-4
}
Syntax Description
Invokes a repeating pattern of zeros (...000...).
0s
(T1 and E1 only) Invokes a repeating pattern of one (1) bit in eight (8).
1in8
Invokes a repeating pattern of ones (...111...).
1s
(Channel group only) Invokes a pseudorandom O.151 test pattern that is 32,768 bits
in length.
2^11
Invokes a pseudorandom O.151 test pattern that is 32,768 bits in length.
2^15
Invokes a pseudorandom O.153 test pattern that is 1,048,575 bits in length.
2^20
Invokes a pseudorandom quasi-random signal sequence (QRSS) 0.151 test pattern that
is 1,048,575 bits in length.
2^20-QRSS
Invokes a pseudorandom O.151 test pattern that is 8,388,607 bits in length.
2^23
(Channel group only) Invokes a pseudorandom 0.153 test pattern of 511 bits in length.
2^9
(T1 and E1 only) Invokes a repeating pattern in which three (3) bits in twenty-four
(24) are set to one (1) and the others are set to zero (0).
3in24
(T1 and E1 only) Invokes a repeating pattern of fifty-five (55) 8-bit octets of data.
This pattern introduces rapid transitions from long sequences of low-density octets to
high-density octets, high-density octets to low-density octets, and rapid 1010 bit
transitions.
55Daly
(T1 and E1 only) Invokes a repeating pattern of fifty-five (55) 8-bit octets of data.
This pattern has fifteen (15) consecutive zeros.
55Octet
Invokes a repeating pattern of alternating zeros and ones (...01010...).
alt-0-1
(Channel group only) Invokes a repeating sequence of 100x FFh, followed by 100x
00h. This combination of minimum and maximum densities causes stressing of the
signal recovery circuitry.
ds0-1
Cisco ASR 9000 Series Aggregation Services Router Interface and Hardware Component Command Reference,
Release 5.3.x
947
T3, E3, T1, E1 Controller Commands on the Cisco ASR 9000 Series Router
bert pattern
