255-700-447
D-3
PacketStar
®
PSAX 2300 Multiservice Media Gateway User Guide
, Issue 1
Release 9.0.0
Appendix D PSAX Module Features
DS1/T1 Interface Modules
DS1/T1 Interface Modules
6-Port DS1 IMA Module (20N33)
The 6-Port DS1 IMA module has six physical RJ-45 ports. The inverse multi-
plexing for ATM capabilities of this module permit a user to strap two to six
of the physical ports together to create ATM interfaces that support 3–9 Mbps
of bandwidth. A maximum of three IMA groups may be configured per mod-
ule.
Source data enters the module from the backplane and is divided between
the ports within the IMA group specified in the virtual circuit connection.
The data leaves the front of the module and is transported across individual
T1 lines. At the destination IMA module, the T1 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 T1s
within an IMA group become unavailable: the IMA "pipe" shrinks in band-
width to the remaining T1s and continues to pass traffic. When a problem T1
comes back on line, the IMA "pipe" will enlarge to take full advantage of the
restored bandwidth.
Software Features
The 6-Port DS1 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 DS1 IMA group services using a
single module.
Hardware Features
The 6-Port DS1 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: 1.544 Mbps
•
Line encoding mode: B8ZS
•
Loopback capabilities: local loopback, line loopback, payload loopback
•
Line buildout: Up to 133, 266, 399, 533, and 655 feet; negative 7-5 dB,
negative 15 dB, negative 22-5 dB, zero dB.
•
Framing mode: ESF, D4
20N07
6-Port Multiserial
23N07
Quadserial
Voice 2-Wire Interface Modules
20N32
4-Port Voice 2-Wire Office
20N30
8-Port Voice 2-Wire Station
Table D-1. PacketStar PSAX Multiservice Media Gateway Modules (Continued)
Model No.
Product Name
Содержание PacketStar PSAX 2300
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