User`s guide

7-2 Preliminary November 23, 1998 MultiVoice Gateway for the MAX— User’s Guide
Configuring Frame Relay
Using the MultiVoice Gateway as a Frame Relay concentrator
Configuration of the MultiVoice Gateway as a Frame Relay concentrator involves configuring
the following elements:
• An interface to the Frame Relay switch (usually nailed T1, nailed E1, or serial WAN)
• A logical datalink to the Frame Relay switch (defined in a Frame Relay profile)
• User connections (defined in Connection profiles)
Kinds of physical network interfaces
The MultiVoice Gateway typically uses serial WAN, nailed T1, or nailed E1 to connect to a
Frame Relay switch. For details of configuring these interfaces, see Chapter 5, “Configuring
the WAN Interfaces.”
Kinds of logical interfaces to a Frame Relay switch
Figure 7-2 shows the types of Frame Relay interfaces supported in the MultiVoice Gateway.
Figure 7-2. Types of logical interfaces to Frame Relay switches
As a Frame Relay concentrator, the MultiVoice Gateway can operate as a Customer Premise
Equipment (CPE) device or as a FR switch, or both. In Figure 7-2, all of the elements could be
Ascend units, but are not necessarily so.
Note: For NNI or UNI-DTE connections, the MultiVoice Gateway is able to query the device
at the other end of the link about the status of the DLCIs in the connection. If any of the DLCIs
become unusable, and the DLCI’s Connection profile has a specified Backup connection, the
MultiVoice Gateway dials the Connection profile specified by the Backup parameter in
Connections > Session Options. For details of the Backup parameter, see the MAX Reference
Guide.)
Network to Network Interface (NNI)
Figure 7-3. Network to Network interface (NNI) in a MultiVoice Gateway unit
An NNI interface connection enables the MultiVoice Gateway to appear as a Frame Relay
network interface on the basis of the NNI specifications. The MultiVoice Gateway performs
both DTE and DCE link management and allows two separate Frame Relay networks to
connect by means of a common protocol. (For more information, see “Configuring an NNI
interface” on page 7-6.)
NO LINKNO LINKNO LINK
NNI NNI
Frame Relay
MultiVoice