Chapter 3 System Features
DS3 IMA Module
3-50
255-700-019
PacketStar
™
PSAX 20 Access Concentrator User Guide
, Issue 1
Release 6.3.0
DS3 IMA Module
The DS3 IMA (Inverse Multiplexing over ATM) module combines the
features of the Channelized DS3 module (see the
PacketStar
™
Channelized DS3
Module User Guide
) and the DS1 IMA module (see the
PacketStar
™
DS1 IMA
Module User Guide
). It allows you to configure up to 28 virtual T1 ports for
native DS1 ATM services or for as many as 14 independent groups. This gives
you point-to-point bandwidth options between that of a single T1 line and
that of a T3 line.
Software Features
The following services and functions are available:
•
Protocols: ATM, IMA (inverse multiplexing over ATM)
•
ATM channelized services over IMA groups:
~
ATM UNI 3.0 and 3.1, with integrated link management interface
(ILMI) capability
~
Interim inter-switch signaling protocol (IISP) user and IISP network
~
ATM private network-network interface (PNNI)
The following ATM Forum Technical Committee Specifications are supported
by the software:
•
User-to-Network Interface Specification Version 3.0
, af-uni.0010.001
•
User-to-Network Interface Specification Version 3.1
, af-uni.0010.002
•
Private Network-Network Interface (PNNI), Specification Version 1.0
, af-pnni-
0055.000
•
Integrated Local Management Interface (ILMI) Specification Version 4.0, af-ilmi-
0065.000
•
Inverse Multiplexing over ATM Version 1.0
, af-phy-0086.000
•
Inverse Multiplexing over ATM Version 1.1
, af-phy-0086.001
Hardware Features
•
Front-End: DMA interface with one physical port
•
Number of ports: one; port density: 28 virtual channels
•
Connector type: two BNC connectors, one to receive data and one to
transmit data
•
Line rate: 44.736 Mbps
•
Bandwidth: 1.544 to 44.736 Mbps
Summary of Contents for PacketStar PSAX 20
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