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Configuring an OC3-ATM Trunk Module
Call control
Changing physical-layer interface settings
The ATM framer multiplexes ATM cells into the SONET payload and extracts cells
from the SONET payload for reassembly into packets. It uses the STS-3C frame
format. The default STS-3C setting indicates a 155.52Mbps interface in the U.S. as
well as the equivalent European 155.52Mbps interface (STM-1).
The interface provides a SONET-level scrambler and one at the cell payload level.
Typically, these functions are enabled. Disable them only if the far-end switch
requires it.
Call control
Using the call-control procedures, you can configure the Stinger MRT to allow
connections to be established even when the line is not fully operational. You can
configure the unit to use these procedures systemwide or on a per-port basis on the
DS3-ATM and OC3-ATM trunk modules and on the ADSL lines. For details, see
"Configuring call control" on page 7-11.
Example of OC3-ATM configuration
The OC3-ATM module can have one active OC3-ATM interface and one spare port
that remains inactive until other trunk port becomes inactive.
The following command lists the trunk port profiles:
admin> dir oc3-atm
40 08/03/1999 15:33:35 { shelf-1 trunk-module-2 2 } 1:18:2
40 08/04/1999 10:18:22 { shelf-1 trunk-module-2 1 } 1:18:1
The following commands enables both ports:
admin> read oc3-atm {1 trunk-module-2 1}
OC3-ATM/{ shelf-1 trunk-module-2 1 } read
admin> set enabled = yes
admin> write
OC3-ATM/{ shelf-1 trunk-module-2 1 } written
admin> read oc3-atm {1 trunk-module-2 2}
OC3-ATM/{ shelf-1 trunk-module-2 2 } read
admin> set enabled = yes
admin> write
OC3-ATM/{ shelf-1 trunk-module-2 2 } written
Checking OC3-ATM trunk interface status
The Stinger MRT unit creates an OC3-ATM-Stat profile for each of its OC3 interfaces.
The profiles provide information about the state of the physical interfaces, error
counters, and ATM framer status information. The Performance-Monitoring and
Interval-Performance-Monitoring subprofiles provide counters for the SONET
payload.
10-6
Stinger® MRT Getting Started Guide
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