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