ADTRAN Express 3010 Manual 

Contents

ADTRAN Express 3010 Manual  Manual pdf 49 page image

Chapter 3. Application Configuration61200239L1-20 Express 3010/3110 User Manual 3-13as other ISUs using a single configuration. This allows for integratingservices without changing the configuration on the Express.The Express must be optioned as follows for FALLBACK operation:• Any asynchronous bit rate up to 115.2 kbps which is supportedby the DTE.• Flow control must be enabled and supported by the DTE.FALLBACK supports the following protocols based on the call type:BONDING mode 1, V.120, and PPP async-sync. When answeringcalls, the Express uses the incoming call type to determine which rateadaption protocols to support.When originating calls to unknown units, the ISU begins protocol se-lection based on the local call type. Data 64k is used for FALLBACKselected from the Profiles menu. Upon connection at 64k call type,BONDING, V.120, and PPP async-sync are attempted. If connectionis not made at 64k, the Express attempts another call at 56k call type.If connection is made at 56k, V.120, and PPP async-sync are attempted.Multilink Point-to-Point ProtocolThis protocol allows the Express to dial a second number, establishinga second point-to-point link. Once the second PPP is established, mul-tilink PPP is performed over both B-channels. The phone number forthe second call should be placed in stored number 1 (SN1). If no num-ber is stored in SN1, the same phone number dialed to establish thefirst link is used for the second link.PPP and STAC CompressionWhen set up to do compression, the Express will negotiate the com-pression control protocol (CCP) with the network PPP peer. If STACcompression is successfully negotiated with the peer, data packetsfrom the DTE are compressed before being sent out the network. Like-wise, compressed packets from the network are decompressed beforebeing transmitted out the DTE.