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Nortel Meridian 1 – Option 11C
Family of Definity PBXs
Thought For The Week
No Question Is A Bad Question!
Nortel Business Key Telephones
PBX Fundamentals
PBX Features And Functions
PBX Configurations
DEFINITY ECS Hardware
PBX Networking
Basics Of Automatic Call Distributor
Lessons In Unit 2:
PBX Systems Are Similar To CO Switches.
Key Point
At the End of Lesson 1, You Should Be Able To:
Describe the Main Components Of A PBX
Explain How A Call Is Made Through A PBX
Define Direct Inward Dialing (DID)
Name and Briefly Describe Key PBX Functions
Name and Briefly Describe Common Auxiliary PBX Equipment
Like CO Switches, PBX Systems Are Powerful Computerized Systems That Offer A Wide Range Of Sophisticated Features.
The General Structure of Most PBXs Is Similar, And Includes The Following Major Components, Shown On The PBX Components Diagram:
Trunks To Connect The PBX To The Telephone Company
Extension Lines To Connect The PBX To Internal Telephones
PBX Components
Continued
Equipment Cabinet: Main Processor, Trunk Cards, And Line Cards
Telephones And Attendant Console
Administrative Terminal
PBX Components
PBX Components
The Connections Between A PBX And CO Switch Are Called Trunks. Trunks Are Usually Large-Capacity Connections.
Businesses Configure Their Trunks Depending On Their Telephone Systems, Business Needs, and Employee Calling Patterns.
PBXs Can Connect To Three Types Of External Networks.
Trunks
The Connections From Individual Telephone Sets To The PBX Are Called Lines, Or Extension Lines.
Each Line Is Formed By A Twisted Pair Of Copper Wire, And Is Assigned A Telephone Extension Number By The PBX Administrator.
Extension Lines
The Equipment Cabinet, A Large Metal Box In The Main Equipment Room, Is The Heart Of The PBX.
Much of the Cabinet’s Circuitry Is Contained On Electronic Circuit Cards That Slide Into Slots And Plug Into A Main Processor Board.
Equipment Cabinet
Most of Equipment Cabinets Are One Of Two Main Types:
Trunk Cards Contain The Circuitry Necessary To Communicate With the CO Switch.
Station Cards Contain the Circuitry Necessary To Communicate With Internal Telephone Extensions.
Equipment Cabinet
Telephone Sets Are Designed To Work With A Particular PBX System.
Each PBX Telephone Set Includes Programmable Features That Can Be Enabled Or Disabled By The Company’s Telephone System Administrator.
Telephones and Attendant Console
A Computer Workstation Provides Administrative Access to the PBX System.
The Company’s Telephone Administrator Uses The System To Configure The Wide Range of Features And Options Available.
Administrative Terminal
Line Card Densities Across PBXs Vary From Eight To 32 Ports Per Card (How Have We Encountered Line Card Density In The Lab?)
Cable Pairs Required For A Proprietary Telephone
One Pair Of Cables Is Always Required For Analog Telephones.
Digital Telephones Can Require Two, Or More Pairs Of Cables.
Distinctive-Code Feature Access
User’s Access A PBX’s Principle Features By Code Dialing.
*7 – Call Pickup
*8 – Call Hold
Examples Of Distinctive Code Feature Access
*3 – Call Forwarding
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Single-Button Feature Access
User’s Access A PBX’s Principle Features By Dialing Individual Single Buttons.
Call Pickup
Call Hold
Call Forwarding
Examples Of Single-Button Features Access
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Making A Telephone Call Within A PBX Environment Is Very Similar To Making A Call From Home Using The Public Telephone Network.
When You Lift The Receiver, Placing the Telephone In The Off-hook Position, The Telephone Signals The PBX That It Needs A Connection.
The PBX Then Sends Dial Tone To The Extension Telephone, And Waits For Incoming Touch Tones.
Making a Call on a PBX
The Primary Function Of A PBX Is To Provide Internal Access To Telecommunications Trunks Provided By A Telephone Company.
A PBX Can Queue, Or Hold, Calls Until A Trunk Becomes Available.
Call Routing
In Addition To Its Core System Features, A PBX Can Provide Many Supplementary Services:
Call Hold
Music On Hold
Hunting
Call Restrictions Or “Class of Restriction
Call Tracking
Supplementary PBX Features
DID Connects Incoming Callers Directly To The Employees They Need To Talk With.
DID Is An Effective Means Of Increasing Customer Contact While Reducing The Load On PBX Operators.
Direct Inward Dialing (DID)
Direct Inward System Access (DISA) Allows An Outside Caller To Dial Directly Into The PBX System, Then Access The System’s Features And Facilities Remotely.
DISA Is Typically Used to Allow Employees To Make Long Distance Calls From Home Or Any Remote Area, Using The Company’s Less Expensive Long Distance Service.
Direct Inward System Access (DISA)
Enables Callers To Dial A Telephone Number And A Password To Gain Access To PBX Features.
CO – Class 5 Switch
Business Traveler
Long Distance Network
Tie Line
NYC Office Chicago Office
Restricted Verses Unrestricted DISA Feature.
Security With DISA Is A Problem.
Many Telephone Sets Now Include Special Function Keys To Access Popular Functions Such As:
Call Forwarding
Call Transfer
Speaker Paging
Speed Dialing
Message Waiting Light
Station Set Features
PBX Operators Are Often The Most Vital Part Of A Company’s Information System.
In Addition, They Can Provide The Following Key Functions From The PBX Operator Console:
Call Processing
Company Directory Assistance
Organizing “Meet-Me” Conference Calls
Night Service
Camp On
Attendant Console Services
The Following Management Features Provide Detailed Information On Calls Being Processed And Completed Through A PBX System.
Call Detail Reports (CDRs)
Test Reports
Busy-Hour Studies
Administration and Management Reports
A Variety Of Other Systems Can Be Added To A PBX To Provide Specialized And Enhanced Services.
Voice Response
Voice Recognition
Call Following
Automated Call Distributor (ACD)
PBX Enhancements
Follow-Me Forward – User Keeps The PBX Informed As To Where She Or He Is, i.e. Office, Number, Home Number, Cell Number.
Cell No.1st Choice
Home No.
Work No.
2nd Choice
3rd Choice
Outside Caller
Choices Change – Caller Preference
Nortel Meridian 1Option 11C PBX
PBX Enhancements
Follow-Me Call Flow
Other Common Types Of Auxiliary Equipment Include:
Station Message Detail Reporter (SMDR)
Uninterruptible Power Supply (UPS)
Direct Station Selector (DSS)
Headset
Other Auxiliary Equipment
In Addition To The One-time Installation Cost, A PBX System Usually Incurs The Following Ongoing Charges:
Equipment Maintenance, Upgrades
Lease or Finance Charges
Trunk Usage
DID Termination Service Charge
DID Numbers In Blocks of 10, 20, or 100
Office Space, Heating/Cooling, Electrical Power
Staff Salaries And Training
PBX Costs And Requirements