Alcatel-Lucent 7210 SAS M Interface Configuration Manual page 175

Parameters
sdh — Specifies the values used on a G.781 Option 1 compliant network.
sonet — Specifies the values used on a G.781 Option 2 compliant network.
tx-dus
Syntax [no] tx-dus
Context config>port>ethernet>ssm
config>port>sonet-sdh
Description
This command forces the QL value transmitted from the SSM channel of the SONET/SDH port or the
Synchronous Ethernet port to be set to QL-DUS/QL-DNU. This capability is provided to block the use of
the interface from the SR/ESS for timing purposes.
Default no tx-dus
7210 SAS M, T, X, R6, Mxp Interface Configuration Guide
Interface Configuration
Page 169