5-17
PA-MC-2T3+ Multi-Channel T3 Port Adapter Installation and Configuration
OL-3526-05
Chapter 5 Configuring Channelized mode for the Cisco PA-MC-2T3+
Configuring a Channelized T3 Link
–
2^15 (per CCITT/ITU O.151)
–
2^20 (per CCITT/ITU O.153)
–
2^20 QRSS (per CCITT/ITU O.151)
–
2^23 (per CCITT/ITU O.151)
•
Repetitive test patterns:
–
All zeros (0s)
–
All ones (1s)
–
Alternating zeros (0s) and ones (1s)
Both the total number of error bits received and the total number of bits received are available for
analysis. You can set the testing period from 1 minute to 14,400 minutes (240 hours), and you can also
retrieve the error statistics anytime during the BER test.
Note
BER testing for the T3 link is not supported in channelized T3 mode. It is only supported for
unchannelized T3 ports.
When running a BER test, your system expects to receive the same pattern that it is transmitting. To
accomplish this, two common options are available:
•
Use a loopback somewhere in the link or network.
•
Configure remote testing equipment to transmit the same BER test pattern at the same time.
Sending a BER Test Pattern on a T1 Line
You can send a BERT pattern on a T1 line with the controller command. The unframed option causes the
BERT pattern to use the entire T1 bandwidth including the T1 framing as well as payload bits. If
“unframed” is omitted, then the T1 will be either SF or ESF framed as configured by the “T1 n framing”
command and the BERT pattern will occupy only the T1 payload bits.
t1
t1-line-number
bert pattern
pattern
interval
time
[
unframed
]
where:
•
t1-line-number
is 1–28.
•
time
is 1–14400 minutes.
•
pattern
is:
–
0s, repetitive test pattern of all zeros (as 00000...)
–
1s, repetitive test pattern of all ones (as 11111...)
–
2^11, pseudorandom test pattern (2,048 bits long)
–
2^15, pseudorandom O.151 test pattern (32,768 bits long).
–
2^20-O153, pseudorandom O.153 test pattern (1,048,575 bits long)
–
2^20-QRSS, pseudorandom QRSS O.151 test pattern (1,048,575 bits long)
–
2^23, pseudorandom O.151 test pattern (8,388,607 bits long)
–
alt-0-1, repetitive alternating test pattern of zeros (0s) and ones (1s), as 01010101
Examples follow:
•
Send a BERT pseudorandom pattern of 2^23 through T1 line 10 for 5 minutes.
