Optionally a backup link via PSTN can be created from branch offices to the main Lotus Sametime Unified Telephony. This can mainly be used to protect the branch office from WAN failure, but may also be configured in order to protect against the failure (or admission control rejections due to overload) of the main Lotus Sametime Unified Telephony.
System Specific Information
There is a new mode of operation introduced for the feature. In addition to normal and survivable operation there is the backup operation mode.
The branch office proxy does not recognize any difference between normal and backup mode of operation. It is the routers task to provide the backup link via PSTN.
In backup operation as opposed to survivable operation there will be the following:
No restriction in the feature set or groups configuration in the branch office.Parent topic: Survivability Overview
No loss of CDR records.
A graceful return to using the main Lotus Sametime Unified Telephony must be provided for when it becomes possible for the subscribers to return to using the main Lotus Sametime Unified Telephony.
General Characteristics of the SBC Branch Office Solution