82
C
HAPTER
4: P
ATH
B
UILDER
S700 M
ODULE
AND
A
PPLICATION
O
VERVIEW
Figure 49
PathBuilder S700 Ethernet Block Diagram
The data is not moved or copied in memory from the time it is received till the time
it is segmented. This guarantees maximum performance of the system.
n
On the opposite side, cells are received from the DS3 UNI, or other ATM
module, side through the STX module.
n
The SAR then assembles the cells belonging to the connections specified for it
and the CPU is given confirmation for the cells that are assembled.
n
The bridge function of the CPU examines the packet header, removes the
encapsulations, and forwards the packet to the proper destination after
learning the address and updating the bridge table. For further information on
bridging, see “Bridging” later in this chapter.
DSX-1/E1 CBR Module
Overview
The PathBuilder S700 supports two CBR modules: DSX-1 CBR and E1 CBR. These
modules are port or application modules for connecting devices such as PBXs
(Private Branch eXchanges), video codecs, DSU/CSUs, T1 multiplexers, and channel
banks for connection over an ATM WAN service.
DSX-1 CBR Module
The CBR service module provides four or eight DSX-1 ports for transit over an ATM
network. The DSX-1 inputs can be either ESF or SF using B8ZS or AMI. The
received frame can be tunneled through the ATM network using DS1 unstructured
mode or broken up into its DS0 and ABCD signaling components using DS1
structured mode. The structured mode allows DS0 mid span drop and insert or
grooming.
Structured and unstructured modes comply with ATM Forum AF-SAA-0032.000.
This service maps the DS1 service through AAL1 adaptation layer over a CBR
ATM
Network
PathBuilder
S700
Ethernet
Input
Bridge
Function
PathBuilder
S700
DS3
DS3
VP.VC
MAC Address to VP.VC Map
02608C123456 = DS3, 0.35
VP.VC
PathBuilder
S700
DS3
PathBuilder S700
PathBuilder S700
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 ...
Page 270: ...256 INDEX ...