Paradyne 3980-A2-GZ40-20 User Manual

13980-A2-GZ40-20November 1996COMSPHERE 3800Plus Modems Synchronous Data Compression FeatureDocument Number 3980-A2-GZ40-20November 1996OverviewThe Par

10November 1996 3980-A2-GZ40-20Table 4(1 of 2)S-Registers for SDCS-RegisterDescriptionDCP LCDCommandSequenceS28 SDC Negotiation.Controls negotiation b

113980-A2-GZ40-20November 1996Table 4(2 of 2)S-Registers for SDCS-RegisterDCP LCDCommandSequenceDescriptionS31 SDC Bit Encoding.Determines the type of

12November 1996 3980-A2-GZ40-20Synchronous Data FormatThe SDC feature supports the High-level Data Link Control (HDLC) and Synchronous Data Link Contr

133980-A2-GZ40-20November 1996Data SynchronizationData exchanged between the synchronous DTE and the modem is synchronized by two clock signals. Datac

14November 1996 3980-A2-GZ40-20Flow Control MethodThe data transmitted from the DTE is sent to the DCE at a rate determined by the transmit clock freq

153980-A2-GZ40-20November 1996Table 5SDC Negotiation Configuration ScenariosOriginating ModemAnswering Modem Negotiation ResultsSDC enabled with LAPM_

16November 1996 3980-A2-GZ40-20Both groups have DTE Rate, Compression Ratio, and Line Efficiency measurements. Each measurement is anaverage of the la

173980-A2-GZ40-20November 1996Modem ConfigurationThere are also configuration options in the V42/MNP/Buffer branch of the 3800Plus modem which affect

18November 1996 3980-A2-GZ40-202. SOFTWARE USEa. The Software(1) shall be disabled or deleted when no longer used in accordance with this License Agre

2November 1996 3980-A2-GZ40-20SYNCHRONOUSDTEINTERCHANGECIRCUITSFUNCTIONDATACOMPRESSIONFUNCTIONERRORCORRECTIONFUNCTIONSIGNALCONVERTERLINECONTROLFUNCTIO

33980-A2-GZ40-20November 199610. Perform a power reset:• For a standalone modem, turn the Power switch to the Off position, then to the ON position, o

4November 1996 3980-A2-GZ40-20SDC User InterfaceWhen SDC is enabled, the following configuration options are available to set up the SDC feature. Some

53980-A2-GZ40-20November 1996Table 1(1 of 3)V.42/MNP/Buffer Configuration Options for SDCSync Comp Mode: DirectModeNxt DirectMode HDLC/SDLCThis c

6November 1996 3980-A2-GZ40-20Table 1(2 of 3)V.42/MNP/Buffer Configuration Options for SDCSyncDTE CRC: IgnoreNxt Ignore CRC16This configuration o

73980-A2-GZ40-20November 1996Table 1(3 of 3)V.42/MNP/Buffer Configuration Options for SDCTXBuffDiscDelay: 10secNxt 10sec Disable 60secThis conf

8November 1996 3980-A2-GZ40-20Table 2DTE Interface Configuration Options for SDCSync DTE Rate: 128000Nxt 128000 115200 112000 96000 76800

93980-A2-GZ40-20November 1996Table 3AT Commands for SDCATCommandDescriptionDCP LCDCommandSequence#DMnSDC Delay Minimization.Minimizes the delay introd