Paradyne 3980-A2-GZ40-20 manual Monitoring SDC Performance

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Table 5

SDC Negotiation Configuration Scenarios

Originating Modem

Answering Modem

Negotiation Results

 

 

 

SDC enabled with LAPM_Buffer

SDC enabled.

SDC connection.

negotiation.

 

 

 

 

 

SDC enabled with LAPM_Discon

SDC enabled.

SDC connection.

negotiation.

 

 

 

 

 

SDC enabled with LAPM_Buffer

SDC disabled.

Buffer mode connection.*

negotiation.

 

 

 

 

 

SDC enabled with LAPM_Discon

SDC disabled.

Disconnect.**

negotiation.

 

 

 

 

 

SDC disabled.

SDC enabled with LAPM_Buffer negotiation.

Buffer mode connection.*

 

 

 

SDC disabled.

SDC enabled with LAPM_Discon negotiation.

Disconnect.***

 

 

 

* If during the negotiation phase, the modem with SDC enabled receives data from the remote modem indicating that it has SDC disabled, the link will not be established between the two modems. For example, the link will not be established if the remote modem is configured for Async mode with an EC mode of V42/MNPorBfr, V42/MNPorDsc, LAPM_Buffer, or LAPM_Discon.

** On a leased line, the originating modem sends an endless EC negotiation sequence with the SDC request parameter. Data cannot be successfully transmitted.

*** On a leased line, the answering modem waits indefinitely for an EC negotiation sequence with an SDC request parameter. Data cannot be successfully transmitted.

Monitoring SDC Performance

If SDC is enabled, six performance measurements related to SDC can be displayed on the DCP. These measurements are available in the SDC submenu of the Status branch and are divided into two groups: TX (transmit) measurements and RX (receive) measurements.

“Status”

Call_Setup

Test

Configure

Control

Remote

Security

Status

VF

Identity

DTE

SDC

 

Options

Record

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TX

 

 

RX

496-14951

3980-A2-GZ40-20

November 1996

15

Image 15
Contents Sample DTE Exchange of Data via Synchronous Protocol and SDC OverviewInstalling the SDC Feature Using the DCP Installing the SDC FeatureMenu Status and Result Codes Installing the SDC Feature Using AT Commands42/MNP/Buffer see Table SDC User Interface42/MNP/Buffer Configuration Options for SDC 42/MNP/Buffer Configuration Options for SDC 42/MNP/Buffer Configuration Options for SDC DTE Interface Configuration Options for SDC DCP LCD Registers for SDC Description Register Registers for SDC Description Synchronous Data Format SDC AlgorithmDTE and DCE Frames Clocks at the DTE±DCE Interface Data SynchronizationSDC Negotiation Flow Control MethodMonitoring SDC Performance DTE Configuration Tuning SDC EfficiencySoftware License Agreement Modem ConfigurationTerm

3980-A2-GZ40-20 specifications

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