--- title: TeleDynamics Think Tank | Troubleshooting (3) description: Troubleshooting | Business Telephone Systems Blog (3) --- [Skip to content](https://info.teledynamics.com/blog/topic/troubleshooting/page/3#main-content) [(800) 847-5629](tel:+1(800)%20847-5629) Search [Become a Dealer](https://www.teledynamics.com/become-dealer) [Log In](http://www.teledynamics.com/) - Products - [Full Product Catalog](https://www.teledynamics.com/catalog) - [VOIP and UC](https://info.teledynamics.com/blog/topic/troubleshooting/page/3#tab2) - [Business Equipment](https://info.teledynamics.com/blog/topic/troubleshooting/page/3#tab3) - [Consumer Electronics](https://info.teledynamics.com/blog/topic/troubleshooting/page/3#tab4) - [Computer and Networking](https://info.teledynamics.com/blog/topic/troubleshooting/page/3#tab5) - [Outdoor Products](https://info.teledynamics.com/blog/topic/troubleshooting/page/3#tab6) - [Home and Personal Care](https://info.teledynamics.com/blog/topic/troubleshooting/page/3#tab7) - 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[Manufacturers](https://www.teledynamics.com/manufacturers) - [Support](https://www.teledynamics.com/contentpages/helpdesk) - [Think Tank Blog](https://info.teledynamics.com/blog) ## TeleDynamics Think Tank ## [One-way audio issues with VoIP and how to fix them](https://info.teledynamics.com/blog/one-way-audio-issues-with-voip-and-how-to-fix-them) Posted by [Guest Blogger](https://info.teledynamics.com/blog/author/guest-blogger) on May 10, 2017, 3:43:00 PM - [Tweet](https://twitter.com/share) [![Grandstream One Way Audio Image.png](https://info.teledynamics.com/hubfs/blog-images/Grandstream%20One%20Way%20Audio%20Image.png)](https://info.teledynamics.com/blog/one-way-audio-issues-with-voip-and-how-to-fix-them) *Are you hearing both sides?*     **By Kate Clavet, Marketing Specialist, Grandstream Networks** The very technology that makes VoIP so efficient can also indirectly cause one-way audio issues. VoIP stands for Voice over Internet Protocol (VoIP), indicating that the communication travels over the internet in little packets using RTP (Real-Time Transport Protocol). Since the packets are traveling through the internet, they must pass through firewalls and network address translation (NAT). Due to the tricky nature of firewalls, a common complaint of customers and installers alike is that either the caller or callee cannot hear the other party. Although this is a common inquiry and topic for support tickets, it is also rather easy to fix. [Read More](https://info.teledynamics.com/blog/one-way-audio-issues-with-voip-and-how-to-fix-them) 0 Comments [Click here to read/write comments](https://info.teledynamics.com/blog/one-way-audio-issues-with-voip-and-how-to-fix-them#comments-listing) Topics: [Business Telephone System](https://info.teledynamics.com/blog/topic/business-telephone-system), [VoIP](https://info.teledynamics.com/blog/topic/voip), [SIP](https://info.teledynamics.com/blog/topic/sip), [Grandstream](https://info.teledynamics.com/blog/topic/grandstream), [Troubleshooting](https://info.teledynamics.com/blog/topic/troubleshooting) ## [How to troubleshoot one-way and no-way audio on VoIP calls](https://info.teledynamics.com/blog/how-to-troubleshoot-one-way-and-no-way-audio-on-voip-calls) Posted by [Daniel Noworatzky](https://info.teledynamics.com/blog/author/daniel-noworatzky) on Jan 25, 2017, 3:38:00 PM - [Tweet](https://twitter.com/share) [![Troubleshoot one-way or no-way audio on VoIP calls - TeleDynamics](https://info.teledynamics.com/hubfs/blog-images/frustrated-man-with-phone-GraphicStock-30pct.jpg)](https://info.teledynamics.com/blog/how-to-troubleshoot-one-way-and-no-way-audio-on-voip-calls) If you deal with Voice over IP (VoIP), you must have come across this scenario at one time or another: A user complains that when they answer their phone, the caller can’t hear them, even though they can hear the calling party. Or, it may be that neither party can hear the other and there is just silence on the line. This is the classic case of one-way or no-way audio, where a voice call is successfully completed, but either the voice packets only successfully travel in one direction, or neither end successfully receives voice packets. It may be difficult to understand why this happens, especially since the phone does ring, both physically for the called party and via the ring-back tone for the calling party. It seems counterintuitive that the transmission of voice packets could be unsuccessful if the call was successfully set up. This is a scenario that comes up a lot on our tech support calls at TeleDynamics. Here we list four of the most common culprits of this issue and suggestions for how to tackle them. [Read More](https://info.teledynamics.com/blog/how-to-troubleshoot-one-way-and-no-way-audio-on-voip-calls) 11 Comments [Click here to read/write comments](https://info.teledynamics.com/blog/how-to-troubleshoot-one-way-and-no-way-audio-on-voip-calls#comments-listing) Topics: [SIP Phones](https://info.teledynamics.com/blog/topic/sip-phones), [QoS](https://info.teledynamics.com/blog/topic/qos), [VoIP](https://info.teledynamics.com/blog/topic/voip), [SIP](https://info.teledynamics.com/blog/topic/sip), [Troubleshooting](https://info.teledynamics.com/blog/topic/troubleshooting) [Previous](https://info.teledynamics.com/blog/topic/troubleshooting/page/2) [All posts](https://info.teledynamics.com/blog/all) ## Welcome to our Think Tank In this blog you'll read our thoughts on business telephone systems. While a lot has changed in telecom since TeleDynamics was founded in 1981, we remain as committed as ever to delivering the best customer service in the industry. If you would like elaboration on a specific topic, please let us know in the comments section. 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