255-700-447
D-19
PacketStar
®
PSAX 2300 Multiservice Media Gateway User Guide
, Issue 1
Release 9.0.0
Appendix D PSAX Module Features
DS3, E3, and STS-1e Interface Modules
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Line rate: 34.368 Mbps (typical)
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Line encoding mode: HDB3
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Line type: G832
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Loopback capabilities: local loop, line loop, payload loop
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Cell mapping: direct mapping
3-Port Unstructured DS3/E3 CES Module (23N02)
The 3-Port Unstructured DS3/E3 CES module provides a clear channel, high-
speed circuit emulation network interface at Digital Signal Level 3 (DS3),
with a line rate of 44.736 Mbps, or at E3, with a line rate of 34.368 Mbps.
Typically, this module is used to connect the Multiservice Media Gateway
system to an ATM edge switch via three ports. The dual-mode capability
allows the customer to deliver unchannelized and unframed traffic in North
American and international ATM networks from a single module. The 3-Port
Unstructured DS3/E3 CES module has three types of LED indicators: FAIL,
ACTIVE, and LOS (loss of signal).
Software Features
Each port on the 3-Port Unstructured DS3/E3 CES module can be configured
to perform adaptation for circuit emulation. The implementation of ATM
Adaptation Layer 1 (AAL-1) allows for the transmission of circuit emulation
data as constant bit rate (CBR) traffic across an ATM network. Voice frames
are converted into ATM cells. With circuit emulation support, the 3-Port
Unstructured DS3/E3 CES module can adapt and concentrate circuit emula-
tion traffic onto an ATM network. This feature enables the Multiservice
Media Gateway system to interface with non-frame relay routers, video
encoders, encryption devices, and other devices that use a synchronous
interface.
Hardware Features
The 3-Port Unstructured DS3/E3 CES module provides the following hard-
ware features:
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Number of ports: 3
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Connector type: 6 BNC connectors for the 3 ports (each port has one
receive connector and one transmit connector)
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Line rate: 44.736 Mbps (DS3); 34.368 Mbps (E3)
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Line encoding mode: B3ZS
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Loopback capabilities: line loopback, local loopback
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Line buildout: short (0–133 feet); long (134–266 feet)
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Framing mode: N/A