Lucent Technologies DEFINITY Enterprise Communications Server Release 8.2 Overview Manual

DEFINITY Enterprise Communications Server Release 8.2
Overview  555-233-002  Issue 1
April 2000
System Overview 
1  
1 —System Overview
DEFINITY Enterprise Communications Server (ECS) organizes and routes voice, data, 
image and video transmissions. It can connect to private and public telephone networks, 
Ethernet LANs, ATM networks, and the Internet. 
Figure 1. DEFINITY Enterprise Communications Server
1Voice3Image
2Data4Multimedia
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System Overview 
2 Hardware 
DEFINITY Enterprise Communications Server Release 8.2
Overview  555-233-002  Issue 1
April 2000
Hardware
Though the primary components are the same, your DEFINITY ECS can vary widely in 
size and appearance, depending on your capacity requirements. It may be as small as a 
single wall-mounted cabinet, or it may be as large as several tall cabinets linked together 
in the same room or even hundreds of kilometers apart. Regardless of configuration, 
however, the system’s...

DEFINITY Enterprise Communications Server Release 8.2
Overview  555-233-002  Issue 1
April 2000
System Overview 
3 Hardware 
whether the system is being duplicated for enhanced reliability. Each carrier can reside in 
the PPN cabinet or an EPN cabinet. One switch node can accommodate up to 15 
Expansion Port Networks.
Fiber Link Administration
Port cabinets are connected via direct fiber links or through fiber links to a Center Stage 
Switch to provide the connections required for voice and data...

System Overview 
4 Hardware 
DEFINITY Enterprise Communications Server Release 8.2
Overview  555-233-002  Issue 1
April 2000
 
Figure 2. Compact Modular Cabinet
Single-Carrier Cabinets
The Single-Carrier Cabinet (SCC) is a compact, floor-mounted modular unit for 
businesses that will at some point require more capacity than Compact Modular Cabinets 
can supply. The SCC can support additional, expansion port networks, so you can add 
capacity as needed, up to the limit set by the overall DEFINITY system...

DEFINITY Enterprise Communications Server Release 8.2
Overview  555-233-002  Issue 1
April 2000
System Overview 
5 Hardware 
 
Figure 3. Typical Single-Carrier Cabinet and cabinet stack
Multi-Carrier Cabinets
The Multi-Carrier Cabinet (MCC) is a large unit designed for high-capacity 
communications systems and large businesses. It can contain up to five carriers and can 
be connected to additional, expansion port networks. Figure 4 shows a typical 
multi-carrier cabinet.
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System Overview 
6 Hardware 
DEFINITY Enterprise Communications Server Release 8.2
Overview  555-233-002  Issue 1
April 2000
 
Figure 4. Typical Multi-Carrier Cabinet
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DEFINITY Enterprise Communications Server Release 8.2
Overview  555-233-002  Issue 1
April 2000
System Overview 
7 Hardware 
Figure 5. Standard Configurations
1Basic SystemAProcessor Port Network
2Directly Connected SystemBExpansion Port Network
3Directly Connected System with Two EPNsCCenter Stage Switch
4CSS-Connected System with up to 15 EPNsDSwitch Node
5CSS-Connected System with up to 43 EPNs
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System Overview 
8 Reliability and Recoverability 
DEFINITY Enterprise Communications Server Release 8.2
Overview  555-233-002  Issue 1
April 2000
Reliability and Recoverability
The system is designed to recover from a power outage or other failure instantly, 
regardless of the source of the failure. Each port network includes a set of segmented, 
parallel buses. If one of the paired segments fails, the other bus segment continues to 
handle communications. You can always further enhance the system’s...

DEFINITY Enterprise Communications Server Release 8.2
Overview  555-233-002  Issue 1
April 2000
System Overview 
9 DEFINITY ECS Network Connections 
are restored and stable, the logic switch is manually reset and the EPN is reconnected to 
the links from the switch. There are both command and manual resets. The resets can be 
done remotely at the SAT or manually at the equipment.
The SREPN must be administered separately (not as a duplicated PPN) to function in a 
disaster recovery scenario. It will not...

System Overview 
10 DEFINITY ECS Network Connections 
DEFINITY Enterprise Communications Server Release 8.2
Overview  555-233-002  Issue 1
April 2000
TCP/IP Networks
DEFINITY ECS can also connect to Ethernet Local Area Networks (LANs) and the 
Internet. 
nThe optional DEFINITY LAN Gateway feature lets the DEFINITY system exchange 
messages with LAN communications software. 
nDEFINITY ECS now supports Internet Protocol (IP) trunks using the TN802B 
circuit pack and C-LAN card (TN799B). However, to connect...