Voice Systems Reading: Bryan Pickett, "The Voice Network...", from The Network Manager's Handbook, John Lusa, ed., Chapter 15
CPE C Customer Premise Equipment From the reading: Servers Clients Local networking Wide area Networking Multiple paths from the enterprise to the PSTN (for mid to large businesses) 2
Placed between End Users and CO connections Provide on premise functions Make cost efficient use of CO connections User User User CPE CO 3
PBX Private Branch Exchange Full Premise Based Switching Key y System Smaller System, simplified administration and use In practice Key Systems today are hybrids CENTREX PBX functionality, but implemented in the Central Office Switch 4
Single-Line Phones Electronic Phones Attendant Console L I N E S PBX Switching System or Fabric Administration T R U N K S Local Switched Access IXC Special Access Private Lines Messaging Maintenance SMDR CTI 5
Analog Phones VoIP Phone L I N E S PBX Switching System T R U N K S VoIP Phone Voice Processing 6
Routing g Calls Attendant Direct Inward Dialing (DID) Handling Missed Calls Call Forwarding General Call Forwarding Busy/No Answer 7
Hunt u tgoups Groups Forward calls to a small group of employees QueuingQ g UCD ACDs Universal Call Distributor Specialized PBX software for inbound call handling 8
Important t for Call Centers (Customer Contact Centers) Distribute incoming calls among a group of employees Groups of employees with specific training might be prioritized iti to receive specific calls Can generate real time and comprehensive historical reports 9
Call destination restrictions s Least cost route selection Automatic redial 10
Calling number ANI Automatic Number Identification Used in 800 services Caller ID Retail level CLASS service Custom Local Area Signaling Services Called Number DNIS Dialed Number Identification Service Used in 800 service DID Direct Inward Dialing CO to PBX Trunk Signaling 11
Traffic (usually measured in call minutes per hour) How Many Simultaneous Calls Processor Total Calling Volume Busy Hour Call Attempts Physical Interfaces Stations and Trunks 12
Moves, oes, Adds, and Changes ges( (MAC) Establish New Service Disconnect Service Change Features On Existing Service 13
Physical Install Assign Extension Number Assign g Class of Service and Other Features Often uses a template (or Table ) A 1234 B C 14
Physical Installation at Define Feature Buttons on the Digital Phone Define Line Appearance Buttons Assign Extension(s) to Line Appearances Assign g Class of Service 15
A B 1 2 3 C 4 5 6 1 2 7 8 9 * 0 # 3 16
A B Hold Xfer 1 2 3 C 4 5 6 Line 2 7 8 9 1 Line 1 * 0 # 2 3 17
A B 1234 5678 Hold Xfer 1 2 3 C 4 5 6 1234 7 8 9 1 5678 * 0 # 2 3 18
Re Draw e a the PBX block boc daga diagram from earlier e in the PowerPoint. Include all items already shown on the example PBX block diagram, and any that are listed on the next slide. You Y must label/show bl/h how each of the items on the next slide connect to the PBX. Every line to the PBX should be labeled with a connection type(analog, digital, TDM T1 or T3). For example, you might show a connection to an IXC. Label the connecting line with a type of connection, possibly TDM T1 T or T3. All items on the next slide should be included. 19
Administration Long Distance Carrier Attendant Console Maintenance Call Forwarding Messaging g Central Office PBX Switching System or "Fabric" CTI Private Lines Electronic Phones Remote PBX Fax Machines Single Line Phones IXC (Special Access) SMDR Line Cards TDM T1 or T3 Local (Switched access) Trunk Cards Local Loop Voice Mail 20