ADTRAN ISU 2X64 user manual DSU 57.6 Async

Chapter 6. Configuration

V.110

The V.110 protocol is a CCITT compliant rate adaptation method providing DTE service between the ISU 2x64 Dual Port ISDN Ser- vice Unit and other V.110 compliant devices. The V.110 protocol supports both synchronous and asynchronous DTE rates. See the section Recommended Operating Modes and Table 1-B for available V.110 rates. Figure 6-21 illustrates the menu path for selecting V.110.

DSU 57.6 ASYNC

The DSU 57.6 ASYNC protocol allows the ISU 2x64 to communi- cate asynchronously at 57.6 kbps with ADTRAN 2-and 4-wire Switched 56 DSU products. In addition, the ISU 2x64 communi- cates with other ISUs over dial and leased connections using this protocol. Figure 6-21 illustrates the menu path for selecting DSU 57.6 ASYNC.

T-Link

The T-Linkprotocol allows the ISU 2x64 to communicate with 2- wire Switched 56 DataPath DUs. The T-Linkprotocol performs two functions:

•It adapts the data rate of sub 64 kbps DTE devices to the 64 kbps bandwidth of the ISDN bearer channel.

•For asynchronous and synchronous DTE rates up to 19.2 kbps, T-Link transmits the status of the DCE-DTE EIA leads to facilitate flow control and maintenance.

In addition to 2-wire Switched 56 DataPath DUs, the ISU 2x64 communicates with any other device using the T-Linkprotocol. Figure 6-21 illustrates the menu path for selecting T-Link.

SAP

The Simple ADTRAN Protocol (SAP) is a rate adaptation method which provides DTE service between ISU 2x64 units at a channel rate lower than the 64 kbps ISDN bearer. Selecting this menu item causes the ISU 2x64 to use SAP protocol.

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