255-700-239
E-17
PacketStar
®
PSAX 4500 Multiservice Media Gateway User Guide
, Issue 2
Release 8.0.0
Appendix E PSAX Modules
2-Port E3 ATM Module
E1 lines. At the destination IMA module, the E1 streams are merged back
together in correct order and passed on to other modules as directed by vir-
tual circuit connections. IMA dynamically handles conditions when E1s
within an IMA group become unavailable: the IMA "pipe" shrinks in band-
width to the remaining E1s and continues to pass traffic. When a problem E1
comes back online, the IMA "pipe" will enlarge to take full advantage of the
restored bandwidth.
Software Features
The 6-Port E1 IMA module offers ATM IMA services, including permanent
virtual circuits, soft permanent virtual circuits, and switched virtual circuits.
The module supports ATM UNI v3.a, IISP, PNNI, and ILMI. This functionality
enables service providers to offer multiple E1 IMA group services using a sin-
gle module.
Hardware Features
The 6-Port E1 IMA module provides the following hardware features:
•
Number of ports: 6
•
Connector type: RJ-45 (120-Ohm symmetrical pair [4 wire + Frame
Ground] interface)
•
Line rate: 2.048 Mbps
•
Line encoding mode: HDB3
•
Loopback capabilities: local loopback, line loopback
•
Line buildout: N/A
•
Framing mode: cyclic redundancy check multiframe (CRC-mf)
2-Port E3 ATM Module
The 2-Port E3 ATM module provides a network interface with a line rate of
34.368 Mbps. Typically, this module is used to connect the PSAX system to
an ATM edge switch. Each port can be configured for ATM service, including
ATM UNI 3.0, 3.1, and 4.0; IISP user and network; and ATM PNNI 1.0 inter-
faces. This module has three light-emitting diode (LED) indicators.
Software Features
The 2-Port E3 ATM module uses ATM Forum specifications UNI 3.0 or
UNI 3.1, which allow either E3 port to act as a user network interface (UNI),
an interim inter-switch protocol (IISP) user or network interface, or as a
PNNI network interface to an ATM network.
Hardware Features
The 2-Port E3 ATM module has the following features:
•
Number of ports: two