Application Module Overview
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virtual channel connection (VCC). The VCC is established as a permanent virtual
circuit (PVC) and mapped from the PathBuilder S700s ATM port to either another
PathBuilder WAN access switch or an ATM Forum circuit emulation compliant
device.
The emulated circuit connection from the DSX-1 CBR port to a remote DSX-1 CBR
port is accomplished by mapping DS1 circuits to Permanent Virtual Circuits. These
circuits will then be transmitted through the ATM network to the destination port.
For details on configuring the PVC, see “Configuring Virtual Circuits”” in
Chapter 5.
Cell Delay Variation is compensated for by the PathBuilder S700 through an
adaptive receive buffer. This buffer can provide consistent synchronous delivery of
DS1 service by building in delay in excess of ATM cell delay and outputting from a
receive buffer. You can configure the adaptive delay.
Dynamic Bandwidth Allocation
Through dynamic bandwidth allocation, the
DSX-1 CBR module can de-activate the CBR PVC and free up network access
bandwidth for other uses. See “DS0 Signaling and Dynamic Bandwidth
Allocation”, later in this chapter, for details.
DSX-1 CBR Module Standards Support
Table 27 lists the ATM standards
supported by the DSX-1 CBR module.
E1 CBR Module
The E1 CBR module features four or eight E1 ports for transit over an ATM
network. It provides a circuit emulator service mapped to ATM cells. The E1 inputs
can be either single or multi-frame using HDB3 line coding. The received frame
can be tunneled through the ATM network using E1 unstructured mode or broken
up into its DS0 and ABCD signaling components using E1 structured mode. The
structured mode allows DS0 mid span drop and insert or grooming.
The structured and unstructured mode comply with ATM Forum
AF-SAA-0032.000. This service maps the E1 service through AAL1 adaptation
layer over a CBR virtual channel connection (VCC). The VCC is established as a
permanent virtual circuit (PVC) and mapped from the PathBuilder S700s ATM port
to either another PathBuilder S700 or an ATM Forum circuit emulation compliant
device.
Network Cell Delay Variation is compensated for by the PathBuilder S700 through
an adaptive receive buffer. This buffer can provide consistent synchronous delivery
of E1 service by building in delay in excess of ATM cell delay and outputting from a
receive buffer. The adaptive delay is configurable.
Table 27
DSX-1 CBR Module ATM Forum/ANSI/ITU-T Supported Standards
Standard
Description
AF-SAA-0032.000
ATM Forum Circuit Emulation Service (CES)
ANSI T1.630/ITU-T I.363
AAL1 Unstructured Data Transfer Mode
Summary of Contents for 3C63400-3AC-C - PathBuilder S700 Switch
Page 14: ...xiv CHAPTER SUPPLEMENTARY REGULATORY INFORMATION ...
Page 18: ...4 ABOUT THIS GUIDE ...
Page 28: ...14 CHAPTER 1 SYSTEM DESCRIPTION ...
Page 88: ...74 CHAPTER 3 GETTING STARTED ...
Page 260: ...246 CHAPTER 6 PATHBUILDER S700 DIAGNOSTICS AND PERFORMANCE MONITORING ...
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