Pcma Codec Voip, This is useful when streams have different codecs, for example AAC audio with main stream and PCMU/PCMA audio with second stream If the stream from your camera is glitchy, try using ffmpeg source. 729 and PCMA are both popular audio codecs used in voice over IP (VoIP) communication systems. Alternatively, you can try setting identical codecs order in Ringotel connection and PBX settings. From cloud of SIP providers you can choose best for you, register account and use Finding the best audio codec Answer for the "which is the best codec" question. 711, G. Select and Play Stream in the call list Play one RTP stream, in the RTP Streams list, Analyze > Play Streams We can see the RTP player after click the Play Streams button. I am referring to an internal call between two extension. I am quite happy with the quality I am getting at the moment on g729, so am wondering if I should play with changing Media codec Twilio supports G. Different VOIP providers can provide and support different audio codecs, and some of them play better on certain types of connections. This page is an article about addressing video quality (resolutions, codecs) using Ozeki VoIP SIP SDK Conclusion In conclusion, PCMA and PCMU are two popular codecs used for voice communication over the internet. The format of these attributes is: a=rtpmap:<payload type> <encoding name>/<clock rate> [/<encoding parameters>] In our example, the SDP advertises that the client supports G722 at 8000 Hz, G. You can To our knowledge, none of these VoIP clients implement an adaptive strategy to switch the session’s speech codec upon changing network conditions. Warnung Die VoIP-Codecs G. CELP(Code Excited Linear Prediction) 6. Two popular codecs used in VoIP are G. C. I generally have PCMA, PCMU and G729 in that order. Jan 11, 2011 · PCMA events & webinars from the leader in providing senior level education and professional networking for the business events industry Wherever you are in the world or in your career, you have a PCMA community to tap into. PCMU(G. So basically. On the page from asteriskguru. Asterisk Codec VoIP 常用编码包括 ITU-T 系列的 G. When I first set it up, I configured it with the credentials of one of my Yay. e. 1 werden zwischen einem VoIP-Gateway und den Clientzugriffs- und Postfachservern eingesetzt. 711 (PCMA y PCMU) y G. 711 μ-law (PCMU) and A-law (PCMA) codecs for media. Bandwidth used by the different codecs When you are using Voice over IP, the used VoIP phones and PBX can use different so called codecs. Other codec types It is possible to save in rtpdump format for any codec (both audio and video) and use e. 711 audio codec comes in two main types: G. - Uncompressed linear CODEC The basic difference between PCMU and PCMA are actual quantization, coding steps, dynamic range and bit formats. Jan 12, 2025 · Join us Jan. 722: This is wideband codec that is always preferred by CUCM over Limited Availability (LA) codecs In addition to the default PCMU and PCMA codecs, Twilio provides Limited Availability (LA) access to the G. Most telephony products use either PCMU or PCMA for capturing or recording audio. 711 (PCMA and PCMU) and the G. S. See if you can spot the difference in exactly when the codec on the A leg is negotiated: Ihr SIP -Passwort finden Sie im Kundenportal. In this paper we investigate how we can improve the speech quality of SIP-based VoIP calls using codec switching when the network conditions change. Part of planning your UM system involves selecting the correct audio codec based on the needs and requirements of your organization. PCMA was founded in Philadelphia, Pennsylvania, as the Professional Convention Management Association and previously operated from Birmingham, Alabama. Esta é a terceira parte de uma série de artigos sobre codecs de áudio utilizados na tecnologia VoIP. 711 boasts several features that make it a preferred choice for VoIP applications, including lossless compression, low latency, and high fidelity encoding. 265, H. Voip at Patton. Host cities share the incredible responsibility and opportunity to expose these meeting planners with three key elements – product, sense of place and the overall attendee experience. 729 - 8 kbps - Low bandwidth CODEC - 8 kbit/s - Narrow band audio data compression algorithm using a frame length of 10 milliseconds Or other codecs. Deep dive into the SIP SDP protocol for VoIP in 2025: architecture, message formats, negotiation, security, and troubleshooting. The codec uses Pulse Code Modulation (PCM) to encode audio signals, ensuring superior voice quality. 711 [G. 711 (PCMA 和 PCMU) 和 G. Hi Everyone I have just purchased a Grandstream HT801 ATA and I have come across a strange problem with it. Changing codec priority in the 3CX stettings doesn't change anything it seems that's a bit weird. 警告 G. A measure of a codec’s sophistication is its ability to carry high-definition Voice or high-fidelity VoIP audio in a small amount of bandwidth required from the network to transport the voice. 711 μ-law. iLBC iLBC (Internet Low Bitrate Codec) es un códec desarrollado por Global IP Sound, empresa posteriormente comprada por Google. 729 Send PPI Header: Enabled PPI Mode: DOD Number Ofrece un servicio sólido con un nivel bajo de pérdida de paquetes, lo que lo hacen ideal para su uso en llamadas de VoIP a través de la red pública. Knowledgebase » Viewing Article How can we help you ? What Codecs do Crazytel Support? Print 26/08/2019 8:21 PM SIP-Trunk Frequently Asked Questions Currently, Crazytel supports the following codecs: G729 a/b G711 PCMU PCMA These are the only codecs supported, others may work but at your own risk. Codec Overview G. wav files, mp3 files, but when we are making a VoIP call in this custom board which is using Codecs - G729, G722, PCMA, PCMU, iLBc, the voice is not coming clear, only noise can be heard. Caso queira ler a primeira parte clique aqui. Pass-through Audio Codecs G729 - G729 in passthru mode. This article explains what codecs are and why you might want to use a codec that is different from the defaults used by TopView. Codec Selection We can see this device only supports PCMA, which makes codec selection pretty easy, it’s going to be PCMA as that was also supported in the SDP offer contained in the initial INVITE. This library does not depend on a sound library, i. easybell. 726 G. So let’s get you prepped and ready to take full advantage of all we offer! Wherever you are in the world or in your career, you have a PCMA community to tap into. A: Voice quality depends on audio codec that was selected in negotiation for current call session. 711 a-law Codec Enabled G. This speaker connects to your network with a single LAN cable for POE and network communications — allowing you to combine video and audio systems into a single proactive security solution. 7xx, GSM, iLBC 其它编码, speex 等已经不推荐使用 Asterisk codecs G. Bitte tragen Sie keinen STUN -Server ein. What Is the Difference Between G. g. Solution is to set just one supported codec and force T-Mobile to use it. We do support PCMU, PCMA, and G729 codec, but AVOXI Genius will transcode PCMA and G729 to PCMU. 711 codecs (PCMU and PCMA), which are the default codecs rtpengine will use in this case if no other codecs are specified. Warning The G. This codec supports different codec options such as Sampling Rate, Variable Bit Rate, Voice Activity Detection and Perceptional Enhancement. Codec 18 describes itself twice, hence the two lines. Jan 11, 2026 · There’s a special sense of occasion at this year’s event, since 2026 marks 70 years since the original meeting that inspired the creation of PCMA — a gathering of health-care executives at a conference in 1956 — took place right here in the City of Brotherly Love. Ein Teil der Planung Ihres UM-Systems umfasst die Auswahl des richtigen Audiocodecs basierend auf den Anforderungen und Anforderungen Ihrer organization. 1 轉碼器是 VoIP 閘道與 Client Access Server 和 Mailbox Server 之間使用的 VoIP 轉碼器。 規劃 UM 系統時，需要根據組織的需求來選取正確的音訊轉碼器。 本主題討論 UM 可使用的音訊轉碼器，可利用它來協助規劃 UM 部署。 Documentation pyVoIP PyVoIP is a pure python VoIP/SIP/RTP library. 711 PCM is an internet wideband audio codec used in VoIP applications G 711 Codecs and G 711a codecs Wideband audio codec 64 kbps PCM A-law and μ-law High quality speech for VoIP Real-time multi-channel implementation Optimized for DSPs, RISC, CISC processors ITU G. 0] is a lossless and stateless compression mechanism for ITU-T Recommendation G. Getting At the end of the post, we mention the use of a preferred codec to help determine what bitrate digits to use when no audio frames had yet been sent. as well as i need to set RTC port to 10K-40K to hear voice, while i plan to use RTCEngine later do i had to use it now?, since local call would still work without it. 729, and GSM and Why Does the Codec Matter? What is a Codec? A Codec is a technical term for the following variations, which essentially mean the same thing: compression – decompression / compressor – decompressor / Code Decode. 729 for BroadWorks, Asterisk, FreeSWITCH, CUCM, UCCX, and more! Advertencia Los códecs G. 3-6. 729 is a low-bitrate codec that offers good voice quality with minimal bandwidth usage, making it ideal for use in networks with limited bandwidth. 723 - 5. Keep in mind PCMU/PCMA only supports 8000Hz, 1 channel, 8 bit audio. 711 Appendix I and Scope: The following will help you identify VoIP CODEC types when reading an SDP. Designed with a new powerful chip, it helps greatly improved Per il voip sono usati principalmente PCMA e PCMU perché gestiti da tutti gli apparati (anche quelli obsoleti) e poi il codec G729 (e le varianti compatibili) perché è poco sensibile ai problemi di linea e consuma poca banda. de (Nur in Ausnahmefällen nutzen) STUN -Server: (nichts eintragen) Codecs: G. 722 G. . Once configured with CHeKT, you can remotely communicate with locations, respond immediately to emergency situations MicroSIP lets you make high quality VoIP calls (person-to-person or on regular telephones) via open SIP protocol. What's the difference between PCMA Codec and PCMU Codec? PCMA and PCMU are both audio codecs commonly used in VoIP communication. 0 [G. ) — Today PCMA was founded in Philadelphia, Pennsylvania, as the Professional Convention Management Association and previously operated from Birmingham, Alabama. 1 codecs are VoIP codecs used between a VoIP gateway and the Client Access and Mailbox servers. 711U (PCMU) Codec priority for internal calls is G722, G729, GSM, PCMU, PCMA, OPUS. 722, G. 722, or G. 711] and thus is not a "codec" in the sense of "lossy" codecs typically carried by RTP. Professional Crisis Management Association (PCMA) provides crisis management and behavior analysis training, certification, consulting and solutions to help individuals and organizations around the globe. 概述在企业级VOIP通信中，语音质量是重要的关注点，而语音质量的好坏和媒体编解码有重要的关系。 freeswitch作为一款免费开源的软交换平台，支持多种不同的编解码格式，具体详情本文不多描述。 而不同的终端也会支… Being a totally open, highly versatile audio codec, is designed to perform a higher HD audio quality than other wideband codecs in a high network bandwidth. T-Mobile has badly set up their VOIP server and it deals badly with multiple supported codecs in order of priority and sends useless audio stream that creates this problem. When it comes to audio codecs used in VoIP communication, G. you can use any sound library that can handle linear sound data i. You can disable CUCM support for G711 using the service parameter G. 722@16kHz Medium quality: SILK@12kHz, G. Here’s why… It turns out many folks had been using a work-around to allow VoIP platforms to use RFC4733 digits with non 8kHz RTP streams. 12–15, 2025, when PCMA Convening Leaders brings its flagship education and networking event to Houston, Texas. 729, G. This article provides information about one-way audio when connecting through SIP (Session Initiation Protocol). Pure python VoIP/SIP/RTP library. kr Jan 1, 2026 · Join PCMA, the definitive authority in education and business networking for leaders in the global meetings, convention and business events industry. Currently supports PCMA, PCMU, and telephone-event - tayler6000/pyVoIP Download jphonelite for free. 723. 711 a law G. Currently, it supports PCMA, PCMU, and telephone-event. Change the Audio Codec from PCMU (which is the codec the American and Japanese phone networks use) to PCMA (which is used by the rest of the world, and crucially, the only one accepted by A&A). 729, Opus, and AMR-NB codecs. Even though these traces are in clear text, these texts can be gibberish unless you understand fully what they mean. Free online tool to convert MP3/WAV to G. I'm trying to connect to asterisk which belongs to vendor, the vendor says that my invite got rejected because codec is not PCMA/PCMU. Codecs by quality: High quality: Opus@24kHz, speex@16,32kHz, SILK@16,24kHz, G. 711 u-law or A-law, G. Our annual signature event, CONVENING LEADERS, was first held in 1956, and PCMA formally incorporated as a non-profit in 1958. However, if the other end has a preference for anything other than PCMA we get no audio and a PCAP shows different codecs being used, us with PCMA and the other end PCMU or G7 Genesys Cloud allows configuring preferred codec list to match SIP trunk provider settings, optimizing call quality and bandwidth usage. Jan 11, 2011 · PCMA events & webinars from the leader in providing senior level education and professional networking for the business events industry PCMA is your gateway to the industry’s most relevant, cutting-edge information and knowledgeable leaders. Fax tones work best with G. Preferred Vocoder/Codec Preference: G711 or PCMA otherwise chose G729 Note: Other devices may ask for details such as Authentication Number or other numbers. 0. How to support these codecs and successfully place a VoIP call using these codecs? Regards Sahil Kalra Whose codec gets preference in following scenario Assuming that Caller sends INVITE sdp with preference: 1)Codec A 2)Codec B Now Callee sends 200 OK sdp with preference: 1)Codec B 2)Codec A W PCMU - G711 8kHz ulaw using default 20ms ptime. 711U) 2. Go to the advanced tab and select the codecs: PCMU PCMA G. pyaudio or even wave. (mod_g729 / mod_com_g729) 🔐 Security First - Pure Rust implementation with modern security practices 🎵 Audio Codecs - Support for OPUS, PCMU, and PCMA codecs 📡 SIP Registration - Standard SIP registration with authentication 📞 Call Management - Make and receive calls with full call state management 🎛️ Real-time Status - Live status updates and call SIP-T33G An entry-level color screen IP phone with high performance, Yealink SIP-T33G offers support for 4 lines and includes local 5-way conferencing. In this article, we will compare the attributes of these two codecs to help you understand their differences and make an informed decision when choosing between them. This document attempts to break down each component of the SIP interact 3. 音频编解码介绍（最全v1. Is this codec translation have any impact on voice quality Voice can be codec with Opus, AMR, Codec2, G. domain. Audio Codec Configuration The device supports four types of codec (PCMU, PCMA, G729, and G722) for encoding and decoding the audio data during the call session. Always use your SIP Username (provided in the email) and NOT your telephone number. 711u 8khz 64kpbs 8 PCM SIP system components SIP messages and responses SIP call flows SDP basics/CODECs SIP standards Questions and answers I'm new to creating a voip apps for mobile devices. 1 day ago · (Washington, D. Video can be coded with VP9, VP8, H. While both codecs have their own set of attributes, including compression algorithm, bitrate, compatibility, bandwidth usage, and audio quality, the differences between them are relatively small. 711@8kHz (PCMU and PCMA), AMR-WB@16kHz This document describes voice codec bandwidth calculations and features to modify or conserve bandwidth when Voice over IP (VoIP) is used. Setting up your modem with voice capabilities Below is an example of a modem gateway with voice Any audio codec can theoretically be used for T. Since 3CX supports PCMU, having just this codec selected should not be an issue. ) — Today, the Pharmaceutical Care Management Association (PCMA) released new data that provides a snapshot of the health of independent pharmacies in the United States. Die Angabe eines Proxy -Servers ist nur in Ausnahmefällen erforderlich. 1 day ago · PCMA is the world’s largest community for Business Events Strategists, providing senior-level education, networking, and market intelligence for the global business events industry. 1 son códecs VoIP que se usan entre una puerta de enlace VoIP y los servidores de acceso de cliente y se buzones. Types Type Name Bitrate Packet Size 0 PCMU / G. Your source for routers, high speed internet, ethernet extenders and remote access servers Complete Communications Engineering G. 711 mu-law and A-law. 729 需要版权, 默认只能透传 G. 711 A-law and G. The most commonly used audio codecs for fax are the G. Example: ------ Outgoing call to sip:01510000000@voip. I want to use best optimized codec for my Internet connection. PCMA(G. Parte del planeamiento del sistema de mensajería unificada consiste en elegir el códec de audio según las necesidades y los requisitos de su organización. For both the iphone and android, I'm using linp I have a netcomm v100 ata using astratel as a voip provider. 711. 1,PCMU,PCMA,G729 (This is the list of codecs that FS will offer to all outbound calls) Look at these two call flows. I currently have an asterisk server set up and also an iphone voip app and an android voip app. grew from 2025 to 2026, according to new data from the National Council for Prescription Drug(Washington, D. So let’s get you prepped and ready to take full advantage of all we offer! Your membership with PCMA can put you on the right track to take your career to the next level. net Fax generally isn't supported over g722. 711 ulaw US alaw Europe iLBC Internet low Bitrate Codec 格式 - 优先选择 slin slin: 16 bit Signed Linear PCM gsm: 原始 GSM 编码，适用于 VoIP wav: MS wav format The best quality you will get on your dsl , will be G729, as it uses less data on you dsl , the codec is for the VoIP providers, G722 is normally for conference type phones, unless you are use In the G. (multiples of 10) PCMA - G711 8kHz alaw using default 20ms ptime. These are the most popular codecs used by carriers so transcoding is unnecessary. 711A) 3. See VoIP_calls. 711 u law G. There's no issue when I make a call with the SPA962 and the codec is G711a every time with MNF or NP but when I use my portable phone the codec selected by the Billion every time is PCMA??? 3) Play RTP stream For now, Wireshark only supports playing pcmu and pcma codec. 726, G. About how to get PCAP file you can refer to the link: How to Get PCAP Dump Capture Alice has a phone with codecs G722 and PCMU Bob has a phone with PCMU and PCMA FreeSWITCH has an outbound "codec prefs" list of G722,G722. SDP and SIP code examples included. com user We are able to play . Hi Although all our extension is configured PCMA as the preferred and PCMU as the second preferred, 3cx always forcing PCMU for the recipient side and PCMA for the caller side. 711 A 9 The quality of VoIP calls depends on the codec used for the transmission and on the bandwidth of Internet connection. 711 and PCMU. The codec encodes and compresses the analog audio containing our speech or video and compresses it into the bandwidth available on the IP network. 33 kbps with an encoding frame length of 30 ms or 15. Turns out, the method mentioned there wasn’t quite right. If you notice poorer than expected audio quality over the call, you may find a different codec that will provide better quality. Jan 1, 2026 · Join PCMA, the definitive authority in education and business networking for leaders in the global meetings, convention and business events industry. G I specify G711a-law on both devices and give no option for any other codecs. The following table gives you a short overview of the bandwidth consumption of the different codecs. Each codec varies in terms of sound quality. iLBC Codec iLBC (internet Low Bitrate Codec) is a narrow band speech codec that operates at either 13. 711 (PCMA und PCMU) und G. The consumption of bandwidth depends on which codec you use. 711A (PCMA), G. Freeswitch setup, profiles , dial-plans and vars for various use-cases - GitHub - altanai/freeswitchexamples: Freeswitch setup, profiles , dial-plans and vars for various use-cases Use the CHeKT outdoor speaker to provide up to 120 decibel crystal clear announcements. 711 (for which they were designed). PCMA is your gateway to the industry’s most relevant, cutting-edge information and knowledgeable leaders. 722. Feb 24, 2025 · 【 3월 】 PCM Practitioner 1 자격 취득 과정 일정: 3월 21 (토) 28 (토) 2일간 (예정) PCM Practitioner 1 갱신 + 2 (P) 갱신 과정 일정: 3월 28(토) 하루 (예정) PCM Practitioner 1 -> 2 (P) 업그레이드 과정 일정: 3월 22 (일) 하루 (예정) 【 2월 】 PCM Practitioner 1 자격 취득 과정 일정: 2월 21 (토) 28 (토) 2일간 (OPEN!) https://ceu. Provided in core PCM module. 38 for fax transmissions. PCMA, also known as G. The only codecs for fax are G. Higher bandwidth means the device can capture more detail, leading to clearer sound and higher sample rates capture more data, reducing distortion and preserving sound quality. 30 We seem to have continual issues with codec negotiation. Both codecs have their own set of attributes that make them suitable for different scenarios. 1 day ago · PCMA is the world’s largest community for Business Events Strategists, providing senior-level education, networking, and market intelligence for the global business events industry. FAQ Center Your Questions, Answered Clearly Convergence Solution GCC601x Series, GCC602x Series, Firewall, Router, switch modules and more View FAQs → UC Solution (IP PBX) UCM6300/A, CloudUCM, SoftwareUCM, GCC (PBX), Wave, UCM RemoteConnect View FAQs → UC Solution (Endpoints) IP Voice/Video Telephony, Wi-Fi Phones, DECT, Gateways/ATAs, GDMS View FAQs → Networking Solution Indoor/Outdoor How to play Opus, Silk, speed, PCMU, and PCMA codec 0 My application is using Lib function to choose best of below available CODEC opus - 48000 HZ SILK - 16000 Hz speex - 16000 Hz speex - 8000 Hz PCMU - 8000 Hz PCMA - 8000 Hz I am new to wireshark, How do i play above Codec as i am not able to see any stream under VoIP call window. In the scenario where both devices support the same codecs, the order in which the codecs are listed defines what codec is selected. In extended mode MicroSIP will show you, what codec was selected for session. 711 m-law (PCMU) and A-law (PCMA) coding algorithms, each sample is coded to be represented by 8 bits with an 8-kHz sampling rate which amounts to a bit rate of 64 kbps. 711 (PCMU and PCMA — pulse code modulation u-law and a-law) at 8000 Hz and G. Hope this helps someone. 30 transmissions, but codecs that are too compressed will make the fax transmission fail. I have to select codecs from the following list: G. 264, and AV1 codecs. Features 6 lines with transfer, hold, conference (up to all 6 lines), g711 u/a, g722, g729a, and video (video support in Linux or Windows only and includes H263/H264/VP8). Most VOIP providers and endpoints within the same region support the same codecs. 711 mu-law Codec Enabled or G. 0 Codec Background ITU-T Recommendation G. We would recommend removing this codec from your invite or have PCMU (g711) and PCMA as the first preference codec. Better, sometimes, is for customers to use T. ADPCM 4. (multiples of 10) L16 - L16 isn't recommended for VoIP but you can do it. 729 Which one to choose and why? I want to have best high quality voice on Support for PCMU, PCMA, or G729 would greatly expand the number of ATA and SIP devices that could interface with the new VOIP integration and the new Assist functionality. Make meaningful industry connections globally, locally and online through platforms designed to bring you together. rtplay program from rtptools to replay the RTP stream towards JMF JMstudio, Apple QuickTime player and similar if they support the codec. The information in this orientation program will help you to get started on your journey. 729 at 8000 Hz. “PCMA and its members are at the epicenter of our meetings, conventions, and tradeshow ecosystem. TopView voice calls over VOIP allow the specification of a codec used for encoding the audio to be used during the call. PBX V68. Java VoIP Softphone (SIP) (replaced by jfPhone) jphonelite is a Java SIP VoIP SoftPhone for Desktops (Windows, Linux, Mac) and Android. 711 Codec – G 711a G. For its fashionable appearance as well as an extra-large 320x240-pixel color display with backlight, it brings comfortable operation experience and clear visual experience for users. The findings reveal that the overall number of independent pharmacies in the U. SIP traces provide key information in troubleshooting SIP Trunks, SIP endpoints and other SIP related issues. Hallo! Weiß jemand, wie sich diese beiden G711 Varianten unterscheiden? Ich habe wirklich intensiv gesucht, aber nichts dazu gefunden. This is really frustrating to debug in UniFi Talk, because it doesn’t tell you that this is the problem unless you trawl through your support file. 3 kbps - Low bandwidth CODEC G. From what I have read these codecs should theoretically be better providing I have sufficient bandwith. L16 can exceed the MTU Rather quickly. 0） 目录： 1. G. 722 - High Fidelity voice G. 711 is a standard codec used in traditional telephony systems and VoIP networks. Session Description Protocol (SDP), originally defined in RFC 2327 (and later updated in RFC 4566), was designed to provide session details (such as the media types, media codec, and IP/port pair for media) and session metadata (such as the purpose of the session and the originator of the session) to participants. And its hearing aid compatible (HAC) handset helps the person who is with hearing loss to hear the voice more clearly. When I set it up it defaulted to G729 codec. Rx Research Shorts PCMA’s “Rx Research Shorts” provides quick hitting videos on PBM-related research we’re working on, and research published by other academics. The G. Did you find this article useful? I just thought to put down a summary list of codecs used in CUCM G. These two algorithms are known as PCMU and PCMA, respectively. com, you can also find a bandwidth calculator tool. 711: It has two versions, A-Law & Mu-Law. I actually found the solution but I am very curious, to say the least, why the problem exists. Proxy: sip. 20 kbps with an encoding length of 20 ms. We’re running our codecs in the following order under our phone templates in the following order: G722 PCMU PCMA G729 Also make sure it’s not just changed under the phone but also under the VOIP Provider; it was a stupid mistake we made where we didn’t add the proper codecs to the provider. LPC(Linear Predictive Coding) 5. 722 and PCMA are two popular choices. 1, and PCMU/PCMA, codecs. I see in my configuration choices I can change to pcmu or pcma codec. Security is achieved via TLS or WSS signalling transport and ZRTP or (DTLS) SRTP media encapsulation. 9xytq, qhm5z0, 3du8s, ncbpl, q3xz, mwsiy, 6wxvc, apv53, 2tfxl, vygvmh,