CRBT is a service for a user to customize a ring tone so that the CRBT system plays a piece of sweet music or a greeting for the calling user to replace the ordinary ring back tone. It is a basic service in the communication value-added service realm. CRBT brings rich and colorful service experience to users and lucrative benefits to operators. It is the …The ringing tone people hear when calling your cell phone abroad. Do people calling my cellphone hear a different ringing (a.k.a. ringback tone) when I am abroad? Short …For a more technical description, according to Wikipedia, the ringback tone is an audible indication that is heard on the telephone line by the caller while the phone they called is still in use. It is normally a repeated tone, designed to assure the calling party that the called party’s line is ringing, although the ring-back tone may be out ...Layanan Ring Back Tone (RBT) adalah layanan berbayar untuk pengganti dan personalisasi nada sambung standar.Layanan ini bisa bikin telponan kamu jadi tambah seru. Eskpresikan diri kamu dengan lagu-lagu hits yang keren banget! Dengan melakukan aktivasi dan berlangganan RBT, lagu-lagu pilihan kamu akan dimainkan setiap kali kamu …This application note describes the implementation of a Color Ring Back Tone (CRBT) wireless service. Focusing on the technologies and signaling involved, this document demonstrates how service providers can integrate CRBT into an existing Signaling System 7 (SS7) wireless application using Dialogic® Signaling Distributed Architecture (SigDiA ...We would like to show you a description here but the site won’t allow us.T-Mobile USA subscribers across the country now can ditch the dull switchboard ring that their callers hear, in favor of a tune that represents their unique style, with the launch today of T-Mobile's ringback tone service, CallerTunes. T-Mobile is the first company to launch a ringback tone service nationwide.Video Ring Back Tone(RBT) is accessible when making a voice or video call over VoLTE network. A short video is played on the caller’s mobile phone before the call is answered. Since 2016, Huawei, in partnership with China Mobile, has done a lot of innovative work for Video Ring Back Tone(RBT) and has also released relevant service …For a more technical description, according to Wikipedia, the ringback tone is an audible indication that is heard on the telephone line by the caller while the phone they called is still in use. It is normally a repeated tone, designed to assure the calling party that the called party’s line is ringing, although the ring-back tone may be out ...Ringback tones (RBT) are actually a throwback to circuit-switched phone networks such as PSTN (Public Switched Telephony Network) ( abbreviations explained … What is a Local Ringback Tone? A ringback tone is the sound callers hear while the phone is ringing. By default, the telephone exchange plays the ringback tone corresponding to the destination phone number. There is no standard, global ringback tone. Each country typically has its own characteristic ringback tone. There is a problem wisth 180/183 Message with SDP but without RTP. When CUCM receives that message, no Ring Back Tone is played. (CUCM 8.6 was used) What's more: 1. When Ipphone receives 183 (SDP) - remote device is sending RTP stream and later ipphone receives 180 (no SDP) -> Ipphone does not switch to play local RBT. 2.The company claims to have invented ringback tones in '02 and currently runs ringback services for 12 cellphone carriers worldwide (Verizon and T-Mobile in the states), so she should know.Skiza tune is a customized ring-back service by Safaricom which enables you to entertain your callers with your favorite sound or music tunes at a cost. Skiza started in the year 2009, and by 2017 the platform had seen 132,000 tunes downloaded where 120,000 are from Kenya. The numbers continue to rise as more Kenyans customise their …Sep 22, 2017 · tone ringback alert-no-pi! This command causes the gateway to generate ringback towards the calling party if an alert is received on the IP call leg with no PI present. It differs from the progress_ind setup command in that the outbound H.225 setup message does not contain a PI of 3 with the tone ringback command. Also, 99% of the people who downloaded a ring back tone got trolled because their emo-pop-punk early 2000's jam turned out to be Spring by Vivaldi for some reason. Reply reply外語： RBT: Ringing Back Tone 品詞：名詞 発呼者に回線交換作業が終了し、被呼者を呼び出し中であることを知らせるための音。「呼び出し音」ともいう。Telkomsel, misalnya, merupakan salah satu provider yang meluncurkan Ring Back Tone di Indonesia dengan nama layanan Nada Sambung Pribadi (NSP) 1212. Fitur ini berisikan lagu-lagu yang sedang hits ataupun tembang-tembang lawas baik lokal maupun internasional, yang dapat dinikmati apabila pelanggan mengaktifkan RBTnya.Video can breathe new life into the gradually declining color ring back tone service, especially when integrated into an industry business model. China Mobile Yunnan and Huawei recently did just that with a new video CRBT service, offering promotional short videos during the “golden 15-second” call waiting interval when users are hyper-focused.Ringback may refer to: Ringback, the ringing signal in telephony used to recall an operator or customer. Ringing tone, also ringback tone, the audible ringing that is heard by the calling party after dialing. Ringback number, a number used by phone companies to test whether a telephone line and phone number is working. Automatic ring back, a ...Click on the tab which says ‘ Ringback Tones ‘. You may select a ringback tone from the top ranking ones listed upfront. Otherwise, you can search through the entire store, using the search tab, provided at the top. Click the ‘Buy’ button next to the ringback tone of …0. That's a great idea. A call metaqueue. The tone detect, if it worked wouldn't be foolproof as sometimes the bridge won't get ring back. You might consider monitoring energy level as well to wait for a period of silence short energy then again silence (a hello sequence). Your arguments for the command - Detect Tone look correct for the …呼出音 （よびだしおん） [1] [注 1] または リングバックトーン （ ringback tone, RBT）とは、 電話 を掛けた際に相手を呼び出しているときに 電話交換機 から発呼側に送られ …1) The ringback tone global market size is huge. There are about 150-200 million ringback tone subscribers in the world, and the industry is valued at about $4 billion and growing (based on 2011 survey). Many in the industry see ringback tones as an old feature-phone service that didn’t survive the transition to smartphones.Verizon Wireless launched the ringback tones service back in 2004 and expanded it a year later. It would play clips of music for callers instead of the traditional ring. Ticker Security Last ChangeWhen setting up a new call the following shows up in our syslog and we hear a RingBack tone. As you can see there is only one 180 Ringing going back to Vodafone. /. Direct Routing microsoft teams audiocodes. Blogging about Microsoft Teams, Skype for Business, Lync Server 2013, Office365, Azure, Audiocodes, Information Security, …Caller ring back for auto attendant redirect (Direct routing) - Silence while redirecting Hi All, We're setup with ported direct routing telephone numbers and have assigned a phone number to a resource …Fenomena Musik Ring Back Tone (RBT): Kapitalisme, Budaya Popular, dan Gaya Hidup ABSTRACT  RBT music is a phenomenon enjoyed by millions  of fans.  RBT, better known as ring back tones  have become part of the lifestyle  of subscribers.  Ring back tones have sound meanings  (as music) which are experienced by callers after …Nada sambung (Inggris: ring-back tone) adalah suara yang diperdengarkan di jalur telepon oleh pihak penelepon setelah selesai melakukan pemanggilan dan sebelum panggilan dijawab oleh pihak yang dihubungi.Versi personal dari nada sambung disebut nada sambung pribadi. Nada sambung dapat berbeda-beda di setiap negara … 呼出音（よびだしおん） またはリングバックトーン（ ringback tone, RBT）とは、電話を掛けた際に相手を呼び出しているときに電話交換機から発呼側に送られる可聴音である。 China Mobile. Relying on VOLTE technology, the video ring back tone is an exclusive black technology service launched by China Mobile based on the 5G core network innovation. It has fully upgraded the call negotiation mechanism between the caller and the called party. When the user makes a call, he will no longer hear a piece of traditional ...リングバックトーンとは架電者 (電話をかけた人)に回線交換作業が完了、 かつ架電先（受電者、電話をかけられた人）が呼び出し中に鳴らす音をいう。 リング …When setting up a new call the following shows up in our syslog and we hear a RingBack tone. As you can see there is only one 180 Ringing going back to Vodafone. /. Direct Routing microsoft teams audiocodes. Blogging about Microsoft Teams, Skype for Business, Lync Server 2013, Office365, Azure, Audiocodes, Information Security, …Your Mom Is Calling. Mom. Mom Is Calling. Ur Daddy Is Calling. can i call you back. Mom Is Calling. Your Mummas Calling. Search free call back Ringtones on Zedge and personalize your phone to suit you. Start your search now and free your phone.Caller Ring Back Tone (CRBT) is one of the many value-added services that has seen incredible adoption in recent years. This service allows customization of the ring back tone. When a call is placed, the caller hears an audible alert through the phone. The alert indicating that a call is successfully going through is called the ring back tone.呼出音は英語ではリングバックトーン（ringback tone）と呼ばれ電話交換機から発信者に対してに送られる音です。 着信音を変更できるということをご存じの方 …Title: v1.0How to configure ring back tone on door station Version: Date: 20 /11 24 Product: Video Intercom Page: 2 of 3 2 2. Add Indoor Station to Door Station 1) Then go to Device Management Add, set the Device Type as Indoor Station, fill in the necessary info of the device. Note: The password is the device’s password, if the device is inactive, set a new …Promote new songs, friends activity, special occasion’s tones, like world cup or sponsored, with Seasonal or Evergreen Campaigns, on certain dates and on special occasions, directly to the users’ phone with an easy to use, wizard based, campaign management tool. (e.g. Find the No1 song of the day you were born and let those calling you hear ...Oct 17, 2023 · II. The Beginnings of Ringback Tones. Origins of the Ringback Tone Ringback tones were first introduced as a way for mobile phone users to customize their calling experience. They replaced the standard ring sound that callers heard while waiting for someone to answer with a short audio clip of music or other sounds. ททท. จับมือ บมจ. ทรู คอร์ปอเรชั่น เปิดตัวบริการ Video Ring Back Tone (VRBT) ภายใต้แคมเปญ “โทรเมื่อไหร่ Amazing เมื่อนั้น” นำเสนอประสบการณ์ท่องเที่ยวในประเทศไทย ทั้ง ...Viettel Caller Ring Back Tone (vCRBT) General introduction • vCRBT is a service enabling users to select and change the ring-tone music of incoming or outgoing calls while waiting for a connection. • Deployed in the markets of Vietnam, Myanmar, Laos, …Users should be compensated for assigning advertising messages as their ring‐back tones. Compensation can be done in various ways, such as receiving free minutes, free SMSs, free ring‐back tones, donation to charity, downloadable application or WAP based benefit programs, etc.Verizon ringtones. One of the easiest ways to get ringtones on an Android phone is to download the Verizon Tones app from the Google Play™ store. From the app, you can purchase and download from a broad selection of great ringtones. You’ll also be able to set specific ringtones for certain contacts and set up a ringback tone that plays for ...Ringback Tone. Nice Tone. Spacy Ringback. Ncell. Htc Ringback Tones. Standardringtone. Ringback funny. Leave a message. Yahoo Ringback Tone. Country … Musketeers. ซื้อ 20 บาท. เปลี่ยนตัวผู้เล่น (Time to Shine) bamm. ซื้อ 20 บาท. แค่อยากรบกวนให้เธอมารักกันได้ไหม. Ta noppawit. ซื้อ 20 บาท. ยินดีไปทั้งน้ำตา. リングバックトーンとは架電者 (電話をかけた人)に回線交換作業が完了、 かつ架電先（受電者、電話をかけられた人）が呼び出し中に鳴らす音をいう。 リング …BSNL has teamed-up with OnMobile Asia Pacific Pvt. Ltd., to install the Ring back tone services for the South zone covering the 4 circles of Tamil Nadu, Chennai, Andhra Pradesh, Karnataka and Kerala.Local ringback tones are a great way to make callers comfortable and engaged when they call your international business phone number. USA: +1 (561) 276-7156 | APAC: +66 (60) 002 ... A ringback tone is the sound …Dec 22, 2023 · To change your ringback tone on your Samsung phone, follow these simple steps: 1. Open the settings menu on your phone. 2. Scroll down and tap on “Sounds and Vibration” or a similar option. 3. Look for the “Ringtone” or “Phone ringtone” option and select it. 4. You will see a list of available ringback tones. The Platform. Ring Back Tones Platform is an end-to-end solution for RBT service, including all the core components responsible for music playing, billing, provisioning, subscription management, all the sales & self-care channels (IVR, SMS, WAP, WEB Responsive, App and USSD) and supporting tools like monitoring, customer care or …Short answer: very likely. Countries often do not use the same sound frequency and cadence for the sounds we hear when dialing a phone number: ringback tone, busy tone, and so on. The International Telecommunication Union publishes a PDF document describing ringing tones used by national networks across the world.Drag the "Ringer and Alerts" slider to the right to increase the volume of your ringtone. You'll hear a preview of the ringtone's volume as you move the slider. [2] If you often use your iPhone in a louder environment, some of the more mellow ringtones might not break through the noise. Tap Ringtone and try selecting a different sound. When you hear an engaged tone, press the number 5 on your telephone keypad to request a Ring Back. Wait until you hear a message confirming that your Ring Back request has been successful, before replacing the handset. The network will then monitor the busy number for up to 45 minutes until it becomes free. SC Tone code. 4. Express Copy (to copy CRBTs you heard from other users) Dial the person back and press (*) before they answer. *. *. 5. To send CRBT gift for your loved ones. G CRBT code Receiver's phone number e.g: G 123456 09XXXXXXXX. G CRBT code Receiver's phone number e.g: G 123456 09XXXXXXXX.Problems with Ring back tone. No 180 Ringing via cisco CUBE (sip-sip) alexver1978. Level 1. Options. 04-26-2018 11:10 AM - edited 03-17-2019 12:42 PM. Hi, There is no RBT in the incoming call from ISP to CUCM via CUBE. There are no 180 Ringing or 183 Session Progress in call leg (ISP - CUBE) but in call leg (CUBE-CUCM) …Problems with Ring back tone. No 180 Ringing via cisco CUBE (sip-sip) alexver1978. Level 1. Options. 04-26-2018 11:10 AM - edited 03-17-2019 12:42 PM. Hi, There is no RBT in the incoming call from ISP to CUCM via CUBE. There are no 180 Ringing or 183 Session Progress in call leg (ISP - CUBE) but in call leg (CUBE-CUCM) … เสียงรอสาย (อังกฤษ: ringback tone, RBT) เป็นการบ่งชี้ด้วยเสียงที่ต้นทางจะได้ยินบนเครื่องโทรศัพท์ หลังจากต้นทางได้กดเลขหมาย และก่อนที่ปลายทางจะรับสาย ... Updated October 3, 2021. By Fronic Media. CRBT is the short form of ‘Caller Ring Back Tone’ and this value added service for the Mobile/Sim/Telecom Operators has been of immense success in the recent years helping service Artists and Music Companies to allow the artist audience base to set Caller Ring Back Tones on there incoming calls ...2. Sep 1, 2021. #1. Greetings, I would like to know if there is a way to disable early media or the auto generated ring back tone when using web client or 3CX Apps , When dialing external numbers for example, user hears a ring back tone while 3CX is trying to connect the call ... Then the actual ringing tone, busy tone or whatever the response ... Promote new songs, friends activity, special occasion’s tones, like world cup or sponsored, with Seasonal or Evergreen Campaigns, on certain dates and on special occasions, directly to the users’ phone with an easy to use, wizard based, campaign management tool. (e.g. Find the No1 song of the day you were born and let those calling you hear ... Find millions of popular wallpapers and ringtones on ZEDGE™ and personalize your phone to suit you. Start your search now and free your phoneReporting back with a resolution. There was a setting in the MetaSwitch to provide the ringback to the caller instead of the IPO providing it. RE: SIP Trunks no ring back to outside party calling in to IPO. amriddle01 (Programmer) 1 Oct 12 15:38. So the Metaswitch provider was completely wrong, as that's not how SIP works at all.Video Ring Back Tone(RBT) is accessible when making a voice or video call over VoLTE network. A short video is played on the caller’s mobile phone before the call is answered. Since 2016, Huawei, in partnership with China Mobile, has done a lot of innovative work for Video Ring Back Tone(RBT) and has also released relevant service …A local ringback tone is the signal tone that is heard by callers while the destination’s phone is ringing. Ringback tones can be customized. USA: +1 (561) 908-6171 • APAC: +66 (60) 002-4172 ... Reach out and a Global Call Forwarding expert will get back with you shortly. Contact Us.1. Oct 18, 2012. #2. pti2000, You mean the ring cadence (I believe that Elastix does call this a ring back tone for some reason). The ringback tone is what the caller hears. Try going to "PBX" tab, then on left side select "Parking lot" and on that page there is a spot to select "alert for orphand calls". In most cases the phone it's self on ...Aug 4, 2023 · Place Test Calls. To confirm your extension is online, try placing test calls from the affected extension to. Your voicemail (Dial 555 ). Other extensions on your 8x8 system. If successful, try calling two or three phone numbers out of your 8x8 network again. No resolution? สัญญาณไม่วา่ ง ( Busy Tone )3. สัญญาณกริ่งเรยี ก ( Ringing Tone )4. สญั ญาณเรียกกลบั ( Ring Back Tone )5. สญั ญาณนูโทน ( Nu Tone ) สญั ญาณใหห้ มุนหรือไดอัลโทน ( Dial Tone )5. Press the plus button in the lower-right corner to add your own ringtone. 6. Choose an audio file from your phone's internal storage. (Image credit: Namerah Saud Fatmi / Android Central) 7 ...Also, 99% of the people who downloaded a ring back tone got trolled because their emo-pop-punk early 2000's jam turned out to be Spring by Vivaldi for some reason. Reply replyIngin mengganti ke layanan RBT (Ring Back Tone) yang lebih baru dan lebih fleksibel. Cara Mematikan NSP Telkomsel. Ada beberapa cara untuk mematikan NSP Telkomsel, di antaranya melalui SMS, telepon, dan aplikasi MyTelkomsel. Melalui SMS. Untuk mematikan NSP Telkomsel melalui SMS, ikuti langkah-langkah berikut: Buka …Click on the tab which says ‘ Ringback Tones ‘. You may select a ringback tone from the top ranking ones listed upfront. Otherwise, you can search through the entire store, using the search tab, provided at the top. Click the ‘Buy’ button next to the ringback tone of …But after call are forwarded to extension there is no ring back tone. For example.. While greetings is played i dialed 2,then call 14753.Call is connected. But no ringback tone. So that i am not able to understand phone is ringing or not. CUCM and CUC is SIP integration. H323 with PSTN. Please help me to solve the issue.5. Press the plus button in the lower-right corner to add your own ringtone. 6. Choose an audio file from your phone's internal storage. (Image credit: Namerah Saud Fatmi / Android Central) 7 ...Ring Back Tone. Overall rating (15 ratings) NuclearTape. June 27th, 2019. Follow. This sound is part of the pack Telecommunication. This is an approximation of the modulated 440Hz tone you hear when waiting for someone to pick up the phone. Made using the Wasp synth in FL Studio.Here are some simple steps you can take to set your ringback tone on Verizon: Step 1: Open the Verizon Tones app. If you don’t already have the Verizon Tones app on your phone, you’ll need to download it from the app store. Once it’s installed, open the app and navigate to the “Ringback tones” section. Step 2: Browse ringback tones.Nada sambung (Inggris: ring-back tone) adalah suara yang diperdengarkan di jalur telepon oleh pihak penelepon setelah selesai melakukan pemanggilan dan sebelum panggilan dijawab oleh pihak yang dihubungi.Versi personal dari nada sambung disebut nada sambung pribadi. Nada sambung dapat berbeda-beda di setiap negara …Local ringback tones are a great way to make callers comfortable and engaged when they call your international business phone number. USA: +1 (561) 276-7156 | APAC: +66 (60) 002 ... A ringback tone is the sound … What is a Local Ringback Tone? A ringback tone is the sound callers hear while the phone is ringing. By default, the telephone exchange plays the ringback tone corresponding to the destination phone number. There is no standard, global ringback tone. Each country typically has its own characteristic ringback tone. to use LM567 tone detecting IC's. The tones are dual tones that are switched. on-off at a determined rate. You could AND gate two 567 outputs, and time. the pulses. to detect a valid signal. IE: "Precise" busy signal is 480HZ and 620 HZ. @ -24dBmo. per tone interupted 0.5 sec on, 0.5 sec off.呼出音 （よびだしおん） [1] [注 1] または リングバックトーン （ ringback tone, RBT）とは、 電話 を掛けた際に相手を呼び出しているときに 電話交換機 から発呼側に送られる 可聴音 である。 概要. 呼出音が鳴っているということは、着呼側の電話機が 着信音 を鳴らしていることを保障するものである。 呼出 … See moreThere is a problem wisth 180/183 Message with SDP but without RTP. When CUCM receives that message, no Ring Back Tone is played. (CUCM 8.6 was used) What's more: 1. When Ipphone receives 183 (SDP) - remote device is sending RTP stream and later ipphone receives 180 (no SDP) -> Ipphone does not switch to play local RBT. 2.Dec 7, 2004 · T-Mobile USA subscribers across the country now can ditch the dull switchboard ring that their callers hear, in favor of a tune that represents their unique style, with the launch today of T-Mobile's ringback tone service, CallerTunes. T-Mobile is the first company to launch a ringback tone service nationwide. To keep the same tone in your Ringback Tone profile, you will receive a text message to renew your tone before the expiry date. You will then be charged RM2 each on subsequent renewals. For instance, if you purchase two tones the first time for RM6, you will need to pay RM4 on subsequent renewals should you decide to keep both tones.Feb 27, 2014 · I enabled the debugs and checked that sip server sends 180 with SDP. When I enter "disable-early-media 180" command under sip-ua, I received ringback tone but once the other party picks up the call, the call is disconnected. Then i've to revert back the config. Call Flow: IP Phone-->CUCM--> H323-->VGW-->SIP-->PSTN. 呼出音（よびだしおん） またはリングバックトーン（ ringback tone, RBT）とは、電話を掛けた際に相手を呼び出しているときに電話交換機から発呼側に送られる可聴音である。
All right, something worked, not exactly the ring back tone, I can hear now the Music on Hold. These are my Call Handlers: Operator-Greeting. Operator-Transfer. The call comes to Operator Greeting, if the person enters the extension number they want to reach it does so, still dont hear the ring back nor moh. Where can i watch the banker
Aug 31, 2021 · พอเข้ามาแล้ว ให้เข้าไปที่ Ringtones & ringback tones โดยเสียงรอสายเจ้าปัญหาที่ LINE แอบมาเปลี่ยนของเราแบบไม่อนุญาตนั้น จะอยู่ในหัวข้อ Ringback tones Advertising ring back tones momentum. By The Mobile Indian Network. January 11, 2011. On average, there is a 15-second wait time before a call is answered. In these 15 seconds, the caller is a ...Dial tone - 425 continuous Ringing tone - 425 1.0 on 4.0 off Call waiting tone - 425 0.2 on 0.2 off 0.2 on 1.4 off Algeria (People’s Democratic Republic of) Busy tone - 425 0.5 on 0.5 off Ringing tone - 425 1.5 on 3.5 off Andorra (Principality of) Busy tone - 425 0.2 on 0.2 offHere are some simple steps you can take to set your ringback tone on Verizon: Step 1: Open the Verizon Tones app. If you don’t already have the Verizon Tones app on your phone, you’ll need to download it from the app store. Once it’s installed, open the app and navigate to the “Ringback tones” section. Step 2: Browse ringback tones.呼出音は英語ではリングバックトーン（ringback tone）と呼ばれ電話交換機から発信者に対してに送られる音です。 着信音を変更できるということをご存じの方 …Click on the tab which says ‘ Ringback Tones ‘. You may select a ringback tone from the top ranking ones listed upfront. Otherwise, you can search through the entire store, using the search tab, provided at the top. Click the ‘Buy’ button next to the ringback tone of …Fenomena Musik Ring Back Tone (RBT): Kapitalisme, Budaya Popular, dan Gaya Hidup ABSTRACT  RBT music is a phenomenon enjoyed by millions  of fans.  RBT, better known as ring back tones  have become part of the lifestyle  of subscribers.  Ring back tones have sound meanings  (as music) which are experienced by callers after …The government of India has ordered the country’s telecoms operators to play a 30-second audio clip about coronavirus in place of a ringing tone in order to raise awareness of the pandemic. India’s Department of Telecom implemented the order following a request from the country’s Ministry of Health and Family Welfare.Ringback number. A ringback number is a telephone number for a telephone line that automatically calls the line that the call was placed from, after the caller has hung up. The typical use of this facility is by telephone company technicians for testing a new installation or for trouble-shooting. [1] Step 3: Personalize Tones. To create personalized tones for AT&T, go to ‘ Manage Ringback Tones ‘ link and then go to ‘ Callers and Groups ‘ section. Add callers to specific answer tones by listing their numbers. With that, your job is done. Just save changes and log out. Users should be compensated for assigning advertising messages as their ring‐back tones. Compensation can be done in various ways, such as receiving free minutes, free SMSs, free ring‐back tones, donation to charity, downloadable application or WAP based benefit programs, etc. เสียงรอสาย (อังกฤษ: ringback tone, RBT) เป็นการบ่งชี้ด้วยเสียงที่ต้นทางจะได้ยินบนเครื่องโทรศัพท์ หลังจากต้นทางได้กดเลขหมาย และก่อนที่ปลายทางจะรับสาย ... .