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Configuring SHDSL Operating Mode on an ATM Physical Interface
To configure the SHDSL operating mode on the physical ATM interface, include the shdsl-options statement at the [edit interfaces at-pim/0/port] hierarchy level:
[edit interfaces at-pim/0/port]
shdsl-options {annex (annex-a | annex-b);line-rate line-rate;loopback (local | remote);snr-margin {current margin;snext margin;}}
Configure the following SHDSL options:
- annex—The type of annex:
- annex-a—Use for North American SHDSL network implementations.
- annex-b—Use for European SHDSL network implementations.
- line-rate—The SHDSL line rate. The default for 2-wire mode is auto. The default for 4-wire mode is 4608 Kbps.
- loopback—A loopback connection, local or remote.
- local—Use to troubleshoot physical PIC errors. A local loopback loops packets, including both data and timing information, back on the local router’s PIM.
- remote—Use to troubleshoot physical circuit problems between the local router and the remote router. A remote loopback loops packets, including both data and timing information, back on the remote router’s PIC.
- snr-margin— The SHDSL signal-to-noise ratio
(SNR) margin, current or snext. The SNR margin is
the difference between the desired SNR and the actual SNR.
- current—Current SNR is the difference between desired SNR and the actual SNR. When configured, the line trains at higher than current noise margin plus SNR threshold.
- snext—Self-near-end crosstalk (SNEXT) SNR margin line trains the line at higher than SNEXT threshold.
