User Guide

The WAN Physical Configuration Screen
Local Management User’s Guide 2-7
DDS Line Mode (Toggle) — Displays the DDS Line Mode. The selections toggle between
DDS-PRI (primary) and DDS-CC (clear channel). This field should be set according to
information from the service provider. The default setting for this field is DDS-PRI.
DDS Tx Clock Source (Toggle) — Displays the clock source as either Loop-Timing or
Local-Timing. The Loop-Timing setting allows the HSIM or CyberSWITCH to receive its timing
information from the service provider, and the Local-Timing setting allows the HSIM or
CyberSWITCH to receive its timing information internally. If DDS-CC is chosen for the DDS
Line Mode then this field must be set to Loop. The default setting is Loop.
DDS Loop-back (Toggle) — Displays the internal Loopback as either Line-Loop or None. Line
loopback is reserved for network diagnostics only. The default is None.
DDS In-Speed (Read-Only) — Displays 56000 (bps) for Primary DDS Line Mode and 64000
(bps) for Clear Channel DDS Line Mode upon start-up.
DDS Out-Speed (Read-Only) — Displays 56000 (bps) for Primary DDS Line Mode and 64000
(bps) for Clear Channel DDS Line Mode upon start-up.