Frequently Asked Questions
This page provides answers to the most common questions people have about RTS® Two-Wire Intercom. 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 RTS® stock products?
- No, RTS® products are built-to-order. Products are built and shipped on a first-come first-serve basis.
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- How can I attach two powered two-wire systems together?
- The transformer in Figure 1 is useful if you need to strip DC voltage off of a wet two-wire system. After proper installation one would be left only with audio on the other side of the transformer. This allows one to hook the line up to another system with its own power supply, or to attach the system to another device that would sensitive to voltage on the line.
Figure 1
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- How can I double the power of a RTS® PS-15 power supply?
- • Use a ¼" stereo cable to connect J3 on the back panel of the PS-15 #1 to J3 on the back panel of PS-15 #2 (to couple the audio)
• Turn the Impedance Select switch on each power supply to Dual position (to return the audio impedance to 200Ω)
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- How can I double the power of a RTS® PS-31 power supply?
- • Using a 4-pin XLR cable, connect J109 of PS-31 #1 to J109 PS-31 #2 (to couple the audio)
• Turn the Impedance Select switches (S201, S301, and S401) on each power supply to Dual position (to return the audio impedance to 200Ω)
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- How can I get only audio from a powered two-wire line?
- The transformer in Figure 1 is useful if you need to strip DC voltage off of a wet two-wire system. After proper installation one would be left only with audio on the other side of the transformer. This allows one to hook the line up to another system with its own power supply, or to attach the system to another device that would sensitive to voltage on the line.
Figure 1
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- How can I interface RTS® TW to a telephone line?
- • Four-Wire telephone, use the RTS® Model SSA-324
• Two-Wire Telephone, use the RTS® Model TWI-222T
• Telephone with dial, busy signal and hybrid use Telos link.
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- How can I interface RTS® TW to Clear-Com® systems?
- • Direct audio interface (pins 1 & 3 of Clear-Com® to 1 & 3 RTS® ch#2).
• Call signal will be interfaced through the Model SSA-324
• Clear-Com® does not have Mic-Off mode
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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.Webmaster@us.telex.com
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- How long is the RTS® warranty?
- The warranty period on standard RTS® components is three years, excluding accessories. For questions regarding warranty terms on specific products, please contact your nearest RTS® representative.
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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?
- RTS® Two-Wire Intercom:
Pin 1: Common
Pin 2: Channel 1 Audio + 30VDC
Pin 3: Channel 2 Audio
Telex® Audiocom®:
Pin 1: Common
Pin 2: Audio Low + 24VDC
Pin 3: Audio High + 24VDC
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 RTS® & Telex® Audiocom®?
- For RTS® you need a Male x-pin XLR for the user stations.
For Telex® Audiocom® you need a Female x-pin XLR for the user stations.
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- What if I cannot hear channel 2 on an MCE-325?
- The MCE-325 needs to be in Mono Mode when using a single-sided headset.
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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 wires 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 recommended cable for TW?
- • 22 AWG twisted pair, braided sheilding (for mobile applications).
• 22 AWG 4 conductor, twisted pair, foil sheilded, and a 'drain' wire for permanent installations. This will reduce both capacitive and resistive crosstalk and help to reduce RF and electrostatic interference.
• For more information, please refer to the Handbook of Intercom Systems Engineering (Figure 1), page 38.
Figure 1
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- What is the RTS® "true" two-wire system?
- The RTS® "true" two-wire intercommunication system is a multi-channel audio communication system. Each channel (line) carries the necessary audio transmit/receive, DC power; call signal transmit/receive and mic-off transmit/receive on one pair of wires or two channels on a common mic cable.
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- What is the RTS® & Telex® Intercom RSS feed?
- Our RSS feed provide a way for users to be notified of the latest RTS® & Telex® 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 RTS® & Telex® Intercom RSS feed.
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- What services does RTS® technical support provide?
- RTS® 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
RTS® 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 RTS® or Telex® products in need of service or repair?
- For RTS®, Telex® RadioCom™, or Telex® Audiocom® 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 are some products and documents listed multiple times in the search results?
- For your convenience, our search engine searches across all the Telex® intercom product lines. Because of our superior compatibility, some of our products and documents exist in multiple product lines. (For example, the SSA-424A can be found on the RTS® Digital Matrix, RTS® Two-Wire, and Audiocom® websites) Therefore, those products and documents will be listed multiple times in the search results, once for each product line it is in. The same technical information can be found in each of a product’s web pages, regardless of which site it is on.
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- Why are the email addresses on this website invalid?
- To send to an email address on this website, replace "at" with @. For example, if an email address is displayed as: example"at"domain.com then you should send to: example@domain.com
The email addresses on this website are displayed this way to deter spam. Many spammers build their mailing lists by using programs that automatically scan websites and collect any email addresses that are listed. By displaying email addresses with "at" instead of @, most spam programs won’t recognize or collect them.
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- Why choose RTS®?
- RTS® products have always enjoyed holding the technological edge over its competition. In a business where the space and cabling are at a premium, RTS® products provide its users with twice as many communication lines (two channels on three wires) and full backwards compatibility. RTS® products provide its users with exclusive options such as Mic OFF that others do not provide. In addition to the excellent Bosch quality, RTS® products provide its users with a cost-effective system and the technical support of one of the most experienced sales and engineering team in the intercommunication 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 RTS® through streamlined and modernized processes, as well as a renewed commitment to research and development.
RTS® 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, RTS® & Telex® have the intercom system that is right for you. RTS® & Telex® 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, currently version 8. 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 RTS® Two-Wire Intercom documentation in an alternative format, send a request to the RTS® & Telex® Intercom Webmaster.
Intercom.Webmaster@us.telex.com
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