Cambium Networks PTP 820 Series, User Manual, Page: 567 / 1149

Chapter 9: TDM Services and Interfaces Configuring Advanced Pseudowire Parameters
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Configuring the Revertive Timer
Path protection can be configured to operate in revertive mode. In revertive mode, the system monitors the
availability of the protected path at all times. After switchover to the protecting path, once the active path is
operational and available without any alarms, the system waits for the duration of the user-configured Wait to
Restore (WTR) time and then, if the active path remains operational and available, initiates a revertive protection
switch. A single WTR time is configured for all the TDM pseudowire services in the system. However, services with
path protection can be configured individually as revertive or non-revertive. You can configure this when you
configure the tunnel group, as explained below.
Note
TDM pseudowire services with 1:1 path protection that were configured using software versions
prior to T7.9 are non-revertive.
To set the WTR time for TDM pseudowire services with revertive path protection:
1 In the Revertive Timer Configuration area at the top of the Pseudowire Tunnel Groups page ( Figure 331 ),
enter the number, in seconds, for the WTR time. The default value is 10 seconds.
2 Click Apply .
Adding a Tunnel Group
To add a tunnel group:
1 In the Select a slot field, select the TDM card to which you want to add the tunnel group.
2 Click Add . The PseudoWire Tunnel Groups – Add page opens.
Figure 332 PseudoWire Tunnel Groups – Add Page
3 In the Tunnel Group ID field, select a unique ID to identify the tunnel group.
4 In the Admin field, select Enable to enable the tunnel group, or Disable if you want to add the tunnel group
but enable it at a later time.
5 In the Primary Tunnel ID field, enter the ID of the tunnel you want to assign as the primary tunnel.