Lucent Technologies DEFINITY Enterprise Communications Server Release 8.2 Administration For Network Connectivity Instructions Manual

Japan TTC Q931-a Private Networking Protocols 
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B  Private Networking
TTC Q931-a Protocols
The TTC defined private networking ISDN protocol is largely based upon ITU-T 
Q.931 protocol.  DEFINITY ECS supports the following TTC defined protocols:
Basic Call support as defined in JT-Q931-a “Digital Interface between PBXs 
(Common Channel Signaling) — Layer 3”
Number Identification Services as defined in JT-Q951-a...

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Setting Up TTC Q931-a
Complete the following steps to set up TTC connections.
Begin
Steps
1  
Verify that you have the appropriate DEFINITY circuit pack for integration 
2  Enter “change system-parameters customer-options” on the command line of 
your system administration screen.
3  On page 1, verify that the G3 Version field is V8 or later
4  On...

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C    Security Issues
This Appendix briefly discusses issues related to system security for DEFINITY ECS in a TCP/IP 
network environment.
Network Security Issues
This section describes a strategy to ensure the security of an intranet that is connected to DEFINITY 
ECS R7 or later systems. 
Overview
The TCP/IP connectivity available with Release 7 and later of DEFINITY 
ECS makes it possible to connect one or more...

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A second line of defense can be thought of as damage control — how to limit the 
amount of damage that can be done if someone does gain unauthorized access to the 
system? Damage control can be provided by application restrictions.
Each of these control methods is described below.
Access control — 
network topologyNetwork topology refers to how the DEFINITY ECS network is...

Network Security Issues 
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Damage control — 
application restrictionsRelease 7 provides damage control by what can be termed application restrictions. 
This simply means that DEFINITY ECS R7 has been designed to support only 
specific applications; that is, DCS and adjuncts. Other applications that could present 
security risks have been deliberately disabled. Specifically, there is no support for...

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D  Capacities and Performance
This Appendix discusses issues related system capacities and performance for DEFINITY ECS in 
an IP network environment. It provides a method of estimating the number of C_LAN and 
MedPro circuit packs that are needed to support various levels of traffic.
This appendix provides performance and traffic configuration guidelines for the C-LAN (TN799B) and the 
MedPro (TN802B) circuit packs....

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The following table gives the number of sockets (connections) needed for IP 
softphones and H.323 trunks.
As a worst-case example of these limits, assume 1000 active H.323 endpoints, each 
requiring 3 C-LAN connections and G.723 codec processing. This configuration 
would require 3x1000/508 = 6 C-LANS and 1000/22 = 46 MedPros.
For C-LANNumber of Sockets Required
Number of sockets per...

 
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D  Capacities and Performance
Performance
OverviewThis section presents methods for estimating:
•the impact on the processor
•the impact on the TDM bus
•the number of C-LAN boards
•the number of MedPro boards
Given assumptions about:
•the number of H.323 endpoints:
~# of road-warrior applications
~# of telecommuter applications
~# of native H.323 phones
~# of H.323 Tie trunks
~# of H.323 DID trunks
•average number...

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Erlang.  The Erlang is a unit of measure of the intensity of telephone traffic. It 
measures the average utilization of a set of system resources during a given time 
period. For example, if a server (trunk) is busy for 30 seconds over a measurement 
period of 2 minutes, the traffic intensity for that measurement period is 0.25 
(30sec/120sec) Erlangs. An intensity of one Erlang...