Frequently Asked Questions
This page provides answers to the most common questions people have about Telex Audiocom. It is updated frequently, so check back often for answers to new questions.
- Do I need to include documentation when sending products in for service or repair?
- Yes, you must include the Repair Information Form when sending products in for service or repair. Click here to download the Repair Information Form. The form must be filled out as completely as possible.
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- Does Telex Audiocom stock products?
- No, Telex Audiocom products are built-to-order. Products are built and shipped on a first-come first-serve basis.
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- How can I double the power on a Telex Audiocom channel while preserving the line audio level (AC Impedance) constant?
- *If the user expanded the use of one channel beyond the DC capability of its power supply, the following is one method of how to double the DC power on a single channel while preserving the audio level and quality on that channel:
Use the PS-2001L as follows:
1. Disconnect the power source to the desired channel
2. Connect half of the system to the PS-2001L power supply CH#1
3. Connect the other half of the system to the PS-2001L power supply CH#2
4. Turn the operation switch (COMBINE/ISOLATE) on each power supply to the COMBINE position to route the audio from CH#1 to CH#2
The above application will provide the user with 2 amps of power (1 amp on each channel) while the audio is combined to allow both power supply channels 1 & 2 to operate as a single-channel intercom.
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- How can I interface Telex Audiocom to Clear-Com?
- A. Most of the Telex Audiocom product line is 100% compatible with the Clear-Com product line (call light included). It only requires the user to switch an internal switch to Unbalanced (UNBAL) operation.
B. The Model CCB-1 will interface any Telex Audiocom model that does not operate in the unbalanced mode directly to Clear-Com.
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- How can I interface Telex Audiocom Two-Wire to a telephone line?
- A. Four-Wire telephone, use the Model SSA-324
B. Two-Wire telephone, use the Model TWI-222T
C. Telephone with dial, busy signal and hybrid use Telos link.
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- How can I report an error or make suggestion about this website?
- You can report errors and make suggestions about this website to the Telex Intercom Webmaster at the E-mail address below. All valid concerns will be considered, and you will be notified if a solution is implemented.
intercom.webmasterus.telex.com
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- How long is the Telex Audiocom warranty?
- Please contact your nearest Audiocom representative regarding warranty terms on specific products.
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- How many two-wire systems are there in the industry and what is the difference between them?
- The two-wire intercom stands as shown in Figure 1
Figure 1
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- What are the pin-outs for line cables and headsets?
- Telex Audiocom:
Pin 1: Common
Pin 2: Audio Low + 24VDC
Pin 3: Audio High + 24VDC
RTS Two-Wire Intercom:
Pin 1: Common
Pin 2: Channel 1 Audio + 30VDC
Pin 3: Channel 2 Audio
Telex Intercom Headsets:
4-Pin:
Pin 1: Microphone Common
Pin 2: Microphone "Hot"
Pin 3: Headphone Common
Pin 4: Headphone "Hot"
5-Pin:
Pin 1: Microphone Common
Pin 2: Microphone "Hot"
Pin 3: Headphone Common
Pin 4: Left Headphone "Hot"
Pin 5: Right Headphone "Hot"
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- What are the right headsets for Telex Audiocom & RTS?
- For Telex Audiocom you need a Female x-pin XLR for the user stations.
For RTS you need a Male x-pin XLR for the user stations.
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- What is a two-wire (TW) system?
- A two-wire audio intercommunication system is an audio system carrying all system's requirements on one pair of wire for each line (channel) of communication.
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- What is the difference between headset connectors?
- A4F: 4 pin Female XLR (Most Commonly Used on Telex Audiocom)
A4M: 4 pin Male XLR (Most Commonly Used on RTS)
A5F: 5 pin Female XLR
A5M: 5 pin Male XLR
Example of How to Order:
PH-44 Dual Sided Light-Weight Headset terminated with a 4 pin female XLR:
PH-44
PH-44 Dual Sided Light-Weight Headset terminated with a 4 pin male XLR:
PH-44R
PH-44 Dual Sided Light-Weight Headset terminated with a 5 pin female XLR:
PH-44A5
PH-44 Dual Sided Light-Weight Headset terminated with a 5 pin male XLR:
PH-44R5
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- What is the technical ingredient of a TW system?
- 1. Power
System should consume no more than 70-80% of the total power available
2. Termination
The Telex Audiocom power supplies are designed with a built-in state-of-the-art audio impedance generator that monitors the audio level and provides the impedance adjustment when new units are added to the intercom system to ensure constant system audio level and quality.
*If the users choose another source of power (Local Power Option) like wall pack or any DC power source, an audio termination should be provided at the end of each line (channel). Figure 1 shows how the audio termination should be.
3. Cabling
Use the standard Microphone cables
For a more ideal connection, use twisted pairs of audio (XLR pins 1 & 2) preferably shielded with the shield connected to earth ground (dead shield) by connecting the shield to the connector shell (inside lug). Use third connector for DC power return.
4. AC Line Noise
In an environment that has computers, lights, (especially neon) and other appliances such as UPS units, it is possible that the C line will have low frequency noise that will be coupled through the power supply on the units with local power (wall packs). It is advisable to connect the AC line to a low noise strip and connect the intercom wall pack to that power strip.
5. Call Light Cross Talk
Every foot of cable equals almost 30PF of capacitance. Depending on the length and type of cable. It sometimes creates a high-frequency (call light) cross talk (when the user calls CH#1 the second user gets CH#1 and CH#2 call flashing). To correct the high-frequency (20 kHz) impedance, plug the capacitance termination plug as shown in figure 2 to the end of your line.
Figure 1
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- What is the Telex & RTS Intercom RSS feed?
- Our RSS feed provides a way for users to be notified of the latest Telex & RTS Intercom documentation automatically. Every time a new document is published to the website, feed subscribers are the first to know about it. Participation is completely anonymous, and you can subscribe with two clicks.
Open the Telex & RTS Intercom RSS feed.
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- What is the Telex Audiocom balanced two-wire system?
- The Telex "Audiocom" balanced two-wire intercommunication system is a multi-channel audio communication system (one to twenty-two channels), each channel (line) carries the necessary audio transmit/receive, DC power, call signal transmit/receive and mic-off transmit/receive on one pair of wire, in addition to DC common. "Mic cable will be suitable for most applications."
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- What services does Telex Audiocom technical support provide?
- Telex Audiocom technical support provides the following services:
• Troubleshooting issues with products
• Answering simple system design questions
• Answering product compatibility/features questions
• Looking up part numbers to be ordered from the Lincoln factory
Telex Audiocom technical support does not provide the following services:
• Updates on PO's
• Price Quotes
• Product Availability
• Issuing RMA's for Repairs
• System Design
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- Where should I send Telex or RTS products in need of service or repair?
- For Telex Audiocom, RTS, or Telex RadioCom Products:
Bosch Communications Systems
8601 E Cornhusker Hwy
Lincon, NE 68507
attn: Service & Repair
E-mail: Repair.Lincoln@us.telex.com
Toll Free: 1-800-553-5992
Direct Main: 402-467-3279
Fax: 1-402-467-3279
For Telex Intercom Headsets:
Bosch Communications Systems
1720 E 14th St
Glencoe, MN 55336
attn: Service & Repair
E-mail: Repair.Glencoe@us.telex.com
Toll Free: 1-800-218-2410
Direct Main: 320-864-3177
Fax: 1-320-864-3225
*Remember to include the Repair Information Form when send products in for repair.
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- Why choose Telex Audiocom?
- Telex Audiocom products have always enjoyed holding the technological edge over its competition. In a business where space and cabling are at a premium, Telex Audiocom products provide its users with a system that starts with a master station and expands in blocks in convenient four-channel expansion panels (ES-4000a) up to 22 stations. The balanced audio design of the Telex Audiocom line allows the user to have a system that can cover more ground and distance than any other intercom while the differential input/output (balanced system) guarantee the excellent audio quality the system enjoys.
The Telex Audiocom products provide its users with exclusive options such as Mic-Off that others do not provide. In addition to the excellent Bosch quality, the Telex Audiocom products provide its users with a cost-effective system and the technical support of one of the most experienced sales and engineering teams in the intercommunications field.
As we combine forces with other industry leaders, our reach expands. In September 2006, Bosch Security Systems Worldwide, a division of The Bosch Group, bought Telex Communications, Inc. and formed Bosch Communications Systems. The acquisition brings the well-known Bosch quality standards to Telex through streamlined and modernized processes, as well as a renewed commitment to research and development.
Telex is proud to be a part of Bosch Security Systems, a division of The Bosch Group that sold products valued at one billion euros in 2005. Bosch Security Systems employs more than 7800 associates, in more than 40 locations in Europe, the Americas and Asia Pacific.
Whatever your requirements may be, Telex & RTS have the intercom system that is right for you. Telex & RTS intercoms are the systems choice among communications professionals everywhere. Why not make it yours!
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- Why do some documents on this website fail to load, or load erroneously?
- The documentation on this website (user manuals, brochures, etc) is in Adobe PDF format. In order to load these documents, you must have the latest version of Adobe Reader installed on your computer. Click here to download the latest (free) version of Adobe Reader. If you cannot install software on your computer, contact your IT department and ask for the latest version of Adobe Reader. If you require Telex Audiocom documentation in an alternative format, send a request to the Telex & RTS Intercom Webmaster.Intercom.Webmaster@us.telex.com
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