EDATA COMMUNICATIONS INC. DSL-2140W ユーザーズマニュアル

Asynchronous transfer mode (ATM) is a protocol that arranges data into small, 

uniform-sized cells with VCI data, as opposed to variable-sized data packets. ATM settings are 

used to connect to your ISP. Your ISP provides your VPI and VCI setting information. You can 

configure up to 8 virtual circuits (VC), each using different encapsulations, if you apply for 8 

different VCs from your ISP. You must activate each VC for it to take effect. For permanent 

virtual circuit (PVC) management, you can use ATM Quality of Service (QoS) to set up each 

PVC traffic line's priority. 

 

 

The following table describes the labels in this screen. 

 

Virtual Circuit 

Select the PVC you wish to modify.   

Status 

Each PCV can be toggled Activated or Deactivate. 

VPI 

Enter your VPI number here. 

VCI 

Enter your VCI number here. 

ATM QoS 

Select the QoS type for the PVC in question from the dropdown list. 

PCR 

Enter the PCR here. For all QoS types. 

SCR 

Enter the SCR here. Only for rtVBR and nrtVBR. 

MBS 

Enter the MBS here. Only for rtVBR and nrtVBR. 

 

The PVCs Summary button opens a new window that displays the current PVC settings.   

Peak Cell Rate (PCR) is the maximum rate at which the sender can send cells. This 

parameter may be lower (but not higher) than the maximum line speed. 1 ATM cell is 53 bytes 

(424 bits), so a maximum speed of 832 Kbps gives a maximum PCR of 1962 cells/sec. This 

rate is not guaranteed because it is dependent on the line speed. 

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Revision: V1.0 

 

Jan. 19 2008