Table of Contents
Advertisement
Configuring an Unchannelized T3 Link
Shutting Down the T3 Controller
You can shut down the T3 controller on the PA-MC-2T3+ with the controller command:
shutdown
This command sends a DS3 idle signal toward the network. You can bring the T3 controller back up with
the no shutdown controller command.
Examples follow:
•
•
Configuring a BER Test on the T3 Controller
Bit error rate test (BERT) circuitry is built into the PA-MC-2T3+. With BER tests, you can test cable and
signal problems in the field.
There are two categories of test patterns that can be generated by the onboard BER test circuitry:
pseudorandom and repetitive. The former test patterns are polynomial based numbers and conform to
the CCITT/ITU O.151 and O.153 specifications; the latter test patterns are zeros or ones, or alternating
zeros and ones.
A list of the available test patterns follows:
•
•
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.
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:
•
•
PA-MC-2T3+ Multi-Channel T3 Port Adapter Installation and Configuration
4-12
The example that follows is for a port adapter on a VIP in interface processor slot 1:
Router(config)# controller T3 1/0/0
Router(config-controller)# shutdown
The example that follows is for a port adapter in slot 1 of the Cisco 7200 series routers:
Router(config)# controller T3 1/0
Router(config-controller)# shutdown
Pseudorandom test patterns:
2^15 (per CCITT/ITU O.151)
–
2^20 (per CCITT/ITU O.151 non-QRSS)
–
2^23 (per CCITT/ITU O.151)
–
Repetitive test patterns:
All zeros (0s)
–
–
All ones (1s)
–
Alternating zeros (0s) and ones (1s)
Use a loopback somewhere in the link or network.
Configure remote testing equipment to transmit the same BER test pattern at the same time.
Chapter 4
Configuring Unchannelized mode for the Cisco PA-MC-2T3+
OL-3526-05
Advertisement
Table of Contents
