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E-35
PacketStar
®
PSAX 4500 Multiservice Media Gateway User Guide
, Issue 2
Release 8.0.0
Appendix E PSAX Modules
Optical-Type I/O Modules
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:
•
Number of ports: 3
•
Connector type: 6 BNC connectors for the 3 ports (each port has one
receive connector and one transmit connector)
•
Line rate: 44.736 Mbps (DS3); 34.368 Mbps (E3)
•
Line encoding mode: B3ZS
•
Loopback capabilities: line loopback, local loopback
•
Line buildout: short (0–133 feet); long (134–266 feet)
•
Framing mode: N/A
The 3-Port Unstructured DS3/E3 CES module supports the following ATM
Forum hardware specifications:
•
44.736 DS3 Mbps Physical Layer Specification,
af-uni-0010.002
•
DS3 Physical Interface Specification,
af-phy-0054
Optical-Type I/O Modules
1-Port Channelized OC-3/STM-1 CES Module
These modules support 84 asynchronous VT1.5s (DS1s), with each DS1 sup-
porting 24 DS0s. The modules support HDLC channels for ISDN service; up
to 2 DS0s per T1 can be configured for the HDLC support. The line rate of the
modules is approximately 155 Mbps. The linear 1+1 APS feature provides
protection against facility, port, or module failure. (Linear APS is 1:1 protec-
tion only, not the N:1 protection feature on the PSAX 4500 System).