Paradyne CSU, DSU, 9126-II, 9128-II manual About the FrameSaver SLV

1. About the FrameSaver SLV

DSX-1 Drop/Insert Port. Allows DTEs/PBXs that support the DS1 signal format to share the T1 network with other high-speed equipment so that voice traffic can share the same local access circuit as the frame relay data.

Back-to-Back Operation. Allows two FrameSaver devices to be connected via a leased-line network or simulation so a point-to-point configuration can be implemented.

Enhanced Ping Operation. FrameSaver devices can check connectivity and roundtrip response time to any remote device in either direction, via the FrameSaver internal management network or the data path.

Payload Management. Any standard, non-management DLCI can be designated as payload managed, providing management directly from a user

Tdata PVC, and support for Telnet, ping, SNMP, and FTP.

Optional ISDN Backup. FrameSaver SLV 9126 and 9126-II CSU/DSUs can be equipped with a BRI DBM, which supports up to two channels. The channels may have different destinations. The DBM may be field-installed in the FrameSaver SLV 9126 CSU/DSU, and must be factory-installed in the 9126-II CSU/DSU.

FrameSaver SLV 9128-II 1-slot units can be equipped with a PRI DBM, which supports up to 23 B-channels, or a BRI DBM. Carrier-mounted FrameSaver SLV 9128-II NAMs support a PRI DBM only.

When an ISDN BRI or PRI DBM (Basic Rate Interface or Primary Rate Interface Dial Backup Module) is installed, the following ISDN backup features are provided:

—Provides automatic dial backup through the ISDN for data when primary frame relay network or access line failures occur, then automatically restores data to the primary route when service returns to normal. Backup is supported regardless of whether or not Caller ID is provisioned on the ISDN circuit. A secondary backup phone number is also available to call when a backup link cannot be established with the primary backup site.

—Supports simultaneous origination, answering, or origination and answering backup calls, as needed, based upon how the ISDN Link Profile is set up. This feature is also known as peer-to-peer calling.

—Provides automatic configuration of an alternate route and DLCI for automatically created PVCs at either the remote site or central site based upon the learned far-end DLCI number. When the automatic backup feature is enabled, backup and restoration occur automatically.

—Provides backup timers that can be configured to better control the amount of time required before backup is initiated, when a backup call will be terminated once the failure condition clears, and a delay before normal service is restored. These features are useful during periods of frequent service disruption.

In addition, round trip latency thresholds can be configured that will initiate backup when configured thresholds are exceeded.

—Supports backup call groups, where redundant PVCs can be assigned to a specified call group. Using this feature, the unit only goes into backup when all PVCs in the group are down, and it returns to normal service as soon as one PVC in the group is operational again. This feature is useful when multiple PVCs are going to redundant central sites.

1-8 September 2002 9128-A2-GB20-80