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1、Telephone Paging Systems A How-To Guide to System Design RadioFans.CN 收音机爱 好者资料库 Contents Profile On Bogen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Why Sell Telephone Paging? . . . . . . . . . . . . . . . . . . . . . . . .3 Choosing the Right System . . . . . . . . . . . .
2、. . . . . . . . . . . . . .4 How To Design a Telephone Paging System . . . . . . . . . . . . .8 Step 1. Does the phone system have a paging output? . .9 Step 2. Is zone paging required? . . . . . . . . . . . . . . . . .11 Step 3. What are the sound pressure levels in the area? . . . . . . . . . . .
3、. . . . . . . . . . . . . . . . . .12 Step 4. What kind of speakers are required and how are they mounted? . . . . . . . . . . . . . . . . . .13 Step 5. How to determine the power taps and coverage per speaker . . . . . . . . . . . . . . . . . . . .20 Step 6. How to determine the appropriate amplifi
4、er . . .21 Bogen Telephone Paging System Products . . . . . . . . . . . . .23 1 Bogen Telephone Paging Systems Printed in U.S.A. Bogen Communications, Inc. 50 Spring Street, Ramsey, NJ 07446 Tel: 201-934-8500 Fax: 201-934-9832 Web: 54-9133-08 9901 RadioFans.CN 收音机爱 好者资料库 Profile On Bogen Bogen Commu
5、nications, Inc., is one of the most highly regarded names in telephone paging, commercial sound and engineered systems equipment in the United States and Canada. For more than 65 years, Bogen has remained one of the leading manufacturers and designers in the field of telephone paging, public address
6、, intercommunications and background music systems. Product reliability, value, and an aware- ness of the customers current and future needs have always been Bogens strength in the marketplace. Bogens telephone paging product line offers the finest and most com- plete line of telephone paging equipm
7、ent available in the industry. It is designed to be easy to use and compatible with all types of telephone systems. Bogens product line has grown to include self-amplified and central-amplified speakers, paging amplifiers, modular zone paging equipment, and digital telephone peripheral equipment. Bo
8、gen offers a full-line of self-amplified speakers and horns for small, low-level (24V) paging applications. For larger (70V) systems, we offer a choice of amplifiers, as well as a full-line of ceiling-mounted and wall-mounted speakers and horns. The choice of self-amplified or central-amplified syst
9、ems lets you install the right system in the most cost-effective manner possible. We are fully committed to our telephone paging program. The product line is supported by: Dedicated Sales Management with a wealth of knowledge and experience in telephone and sound equipment. Applications Engineers av
10、ailable to assist in the design of any paging system, no matter how complex it may be. Telephone Engineers creating the most advanced products in the industry. Representatives providing local support nationwide (23 regional offices) and throughout the world. 2 RadioFans.CN 收音机爱 好者资料库 Why Sell Teleph
11、one Paging? A voice paging system is the most popular add-on peripheral to a telephone system and one of the easiest to sell. This offers the potential to increase the size and profitability of every telephone system sale. By including a telephone paging system in each one of your telephone system p
12、roposals, you are offering a complete value-added voice communications system. It helps you support the “one vendor” concept and enhances your image as a knowledgeable communica- tions consultant. A few of the benefits offered by telephone paging systems are: Emergency alert Voice evacuation or stan
13、dard alarm increases safety. Reduces liability possible reduction on insurance costs. Night ringer provides a tone to alert personnel of incoming calls or of visitors at remote entrances. Optional tone generator for emergencies and code calling. Broadcast announcing Gets information out quickly. Rep
14、laces trivial memos (lowering cost). Zone paging allows specific areas to hear selected announcements. Locating people Increases productivity. Better customer service through greater accessibility to people. Professional image. Increased revenue (fewer lost orders). Reduces long-distance call backs.
15、 Background music Increases productivity (major background music suppliers claim 15% rise). Increases conversation privacy. Telephone paging systems are also recommended where internal communications are the customers primary need, such as in warehouses, mail rooms, etc. 3 Choosing the Right System
16、There are two types of paging systems: Central-amplified systems Commonly referred to as high-power or 70-volt systems. Self-amplified systems Known as low-power or 24-volt or distributed systems. Both types are relatively simple and consist of three separate elements. These are: Loudspeakers: To re
17、produce the paging signal. Amplifiers: To amplify the voice and/or music signal. The amplifiers can either be small units mounted on the loudspeaker (self-amplified system), or larger units which are centrally located and drive a number of loudspeakers (central-amplified system). Interface devices:
18、To interface or match the paging system to the telephone system (if required). It is essential to become familiar with the two basic types of paging systems and their relative strengths and weaknesses in order to properly determine the right choice of paging system for your proposal. If you dont fam
19、iliarize yourself with both systems and make the right choice, your competitors may gain a distinct price advantage over your proposals, especially on larger systems. 4 System Cost Comparison - Cone Type Loudspeakers $1600 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20、 . . . . . . . . $1400 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $1200 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $1000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21、 . . . . . . . . $800 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $600 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $400 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22、. . . . . . . $200 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 051015202530 Number of Speakers Central-Amplified Self-Amplified Self-Amplified (24V) Syst
23、ems In this type of system, each speaker has a small amplifier (either built-in or attached) which, when provided with an audio signal and 24V DC power, broadcasts sound. (Two pairs of wire for each - one audio, one DC.) Advantages: This is the least costly approach for small systems (generally up t
24、o 6 speakers or 4 horns). In these small systems, the unit cost of the self-amplified speakers and horns is more economical than using a central amplifier and an equal number of centrally-amplified speakers and horns. It allows telephone cables and paging lines to be run in close proximity to each o
25、ther, even in the same cable tray or in the same cable. Disadvantages: In larger systems (generally more than 6 speakers or 4 horns), the high unit cost of amplified speakers and horns makes the self- amplified system more costly. Thats where costs can skyrocket and make your proposals very uncompet
26、itive! It does not perform as well in combined music and paging systems, since the built-in amplifiers are designed primarily for speech reproduction, and have a narrower frequency response. Some amplified horns have inadequate heat-sinking and are not recommended for constant music applications. It
27、 typically does not offer all of the more sophisticated features inherent in most central-amplified systems, such as tone control, automatic level control, etc. Requires twice the number of speaker connections. 5 6 Basic Self-Amplified System (24V) Basic Central-Amplified System (70V) Central-Amplif
28、ied (70V) Systems In this type of system, a central amplifier is used along with speakers and horns which have built-in transformers to match them to the 70V output of the central amplifier. These 70V speakers can be tapped at different wattage levels providing more or less power to the speaker, all
29、owing it to cover areas of low to high noise. Advantages: Lends itself to larger systems, as the significantly lower unit cost of central-amplified speakers and horns is much more economical than self-amplified speakers. Offers better sound in combined music and paging systems because of the central
30、 amplifiers superior performance characteristics. Provides features such as extra microphone inputs, tone control, automatic level control, automatic music muting during a page and “night ringer” signal distribution, not found in less sophisticated self-amplified systems. Disadvantages: Not as cost
31、effective in small systems. Some care must be taken in routing speaker lines, as they should not be in close proximity to telephone lines. 7 How To Design A Telephone Paging System The most important thing to remember about surveying, designing, and quoting a telephone paging system is that there is
32、 no mystery or magic involved. The successful system design is one that combines good, old-fashioned common sense with a few rules-of-thumb and commonly practiced installation guidelines. This “How To” section will not make you an expert at sound system design. However, it will give you the basic ru
33、les and practices of telephone paging system design to allow you to successfully survey and quote the majority of the jobs you will face with the most competitive proposals. So, Where Do You Begin? Start with these steps: Step 1. Does the phone system have a paging output? Step 2. Is zone paging req
34、uired? Step 3. What are the sound pressure levels in the area? Step 4. What kind of speakers are required and how are they mounted? Step 5. How to determine the power taps and coverage per speaker. Step 6. How to determine the appropriate amplifier. 8 9 Step 1. Does the phone system have a paging ou
35、tput? If the answer is yes, then it is typically a simple two-wire connection. If the answer is no, a TAM-B interface is required. The TAM-B access module is compatible with standard telephone systems and interfaces with the paging system. The TAM-B is capable of either station port or trunk port op
36、eration. It interfaces with both PBX station lines and either loop start or ground start trunk ports and often cuts the interface cost by a factor of 10 to 20 times! Station line and PBX interface (No external power supply needed.) When a station line is used for paging, the user simply dials the ex
37、tension number connected to the TAM-B and the paging circuit. The TAM-B recognizes the 90V ring signal, accepts the call and then completes the audio path to the paging system. Also included in the TAM-B are facilities to send, if desired, a tone signal to the party originating the call to “confirm”
38、 the calls completion and let the originator know the page circuit has been activated. The same tone signal can also be broadcast over the paging system as a “pre- announce” tone. At the conclusion of the page, the TAM-B auto- matically disconnects the paging system. Trunk port paging is just as sim
39、ple. It is accomplished by dialing the assigned access code number for the paging trunk. The TAM-B, in this mode, furnishes the PBXs trunk port with the current/signaling it needs to complete the circuit and provides the needed audio path to the paging system. It also provides for confirmation and p
40、re-announce tones, if desired. The paging circuit automatically disconnects when the paging party hangs up. (Power supply required.) Model TAM-B Centrex interface Interfacing to a Centrex line is accomplished easily using a TAM-B access module. It connects directly to any Centrex line, and permits p
41、aging by simply dialing the extension number assigned to that line. In these systems, the TAM-B operates just as it did when connected to a PBX station line and paging is just as simple to perform. (No exter- nal power supply needed.) Electronic Key System interface Most Electronic Key Systems (EKSs
42、) are equipped with a 600-ohm paging port which interfaces readily with most paging systems. All that is normally required is the 600-ohm isolation transformer built into all self-amplified speakers and horns and into our TPU Series telephone paging amplifiers. In these systems, paging is accomplish
43、ed either by pressing the “page” button or dialing the access number assigned to the paging port. Interfacing to EKSs station lines is usually not possible with the TAM-B or any other commercially available interface device due to the nonstandard station line circuitry used by most EKS manufactur- e
44、rs. Additional Audio Inputs One important feature of a centrally-amplified paging system is its flexibility. Most central amplifiers provide for multiple inputs of various types. Both line level input sources, like tuners, and sensitive low level sources, like microphones, are typically accommodated
45、 in these amplifiers. Each input source has an individual level to allow “balancing” the volume levels of the different inputs. Many central amplifiers include other features to complement the multiple input capability. A typical feature is remote muting of inputs using an external contact closure.
46、This type of function allows an emergency page microphone to be established. Any time the microphones “push to talk” switch is activated, all other input sources are silenced so only the emergency announcement is heard. 10 11 Step 2. Is zone paging required? If the answer is yes, you can use the PCM
47、2000 Modular Paging/Zone Control System. By integrating unique, multi-function modules, we have developed a system that offers both incredible flexibility and unlimited future expansion. Modular integration assures the installer that the system can be reconfigured and enhanced with minimal time and
48、expense. Facility owners can be confident that the system can grow as their business changes now, and throughout the life of the facility. The PCM2000 can perform simultaneous paging through self-ampli- fied and central-amplified systems. The basic system supports up to three paging zones and consis
49、ts of only three modules: PCMCPU Central Processor Unit PCMTIM Telephone Interface Module PCMZPM Zone Paging Module (3 zones) Two additional zone modules (PCMZPM) can be added to the basic system to increase capacity to 9 zones. When more than 9 zones are required, a central processor module and up to 3 zone modules can be assembled as a satellite sys- tem along with a PCMPS Power Supply. Up to 9 satellite systems may be added to the original 9-zone system to bring the system capacity to 99 zones. To add hands-free talk back t
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