> ## Knowledge Base Index > Fetch the complete knowledge base index at: https://help.marketcall.com/sitemap.xml > Use this file to discover available pages before exploring further. > Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash). # Testing a rented phone number using the Twilio Virtual Telephony **Testing a rented phone number using the Twilio Virtual Telephony** **Registration** To test a rented phone number, an affiliate can use a trial version of the Twilio service. First, you need to register and verify by email and phone. To get a $10 bonus to your account, you need to click on our referral link: http://www.twilio.com/referral/CwaVOP ![](https://storage.crisp.chat/users/helpdesk/website/cc18bc9ffe16e000/1_1jugg35.png) After verification you would need to answer a couple of questions for the final registration. It is enough to set the options as in the screenshot below. ![](https://storage.crisp.chat/users/helpdesk/website/cc18bc9ffe16e000/2_vaqhsu.png) **Rent a number** After registration you need to go to the number rental page: https://www.twilio.com/console/phone-numbers/search Choose a country Click the "Search" button” ![](https://storage.crisp.chat/users/helpdesk/website/cc18bc9ffe16e000/3_2grkld.png) After that you would see a list of numbers for rent. You need to choose any suitable one and click the “Buy”button. ![](https://storage.crisp.chat/users/helpdesk/website/cc18bc9ffe16e000/4_4a6jw5.png) After that the confirmation page opens, you need to click on the " Buy " button at the bottom. ![](https://storage.crisp.chat/users/helpdesk/website/cc18bc9ffe16e000/5_16fvurl.png) **Adding a SIP Domain** After renting a number you need to add it to the SIP domain. To do this, click on the link: https://www.twilio.com/console/voice/sip/endpoints/add Next, you need to fill in the required fields to create a SIP domain. Friendly name - The name for this SIP domain setting SIP URI - a unique subdomain that will be used for the connection in future. IP Access control list - create a list of allowed IP addresses (details below) Credential list - creating a list of allowed SIP domain users (details below) ![](https://storage.crisp.chat/users/helpdesk/website/cc18bc9ffe16e000/6_163v7rp.png) **IP Access control list** **** Friendly name - the name of the list CIDR Network address - the address range. You can specify your external IP address in the 1.1.1.1/32 format. You can find out your external IP here: https://whatismyipaddress.com/ Friendly name - Name for the address range ![](https://storage.crisp.chat/users/helpdesk/website/cc18bc9ffe16e000/7_1o8abwn.png) **Credential list** Friendly name - The name of the list Username - you can specify the number that you bought in the E. 164 format (for example: +15005551212) Password - a password of at least 12 letters, one uppercase letter, one lowercase letter and a number. ![](https://storage.crisp.chat/users/helpdesk/website/cc18bc9ffe16e000/8_197tzsm.png) After you fill in all the required fields, you would need to enable SIP registration and specify the list of users that was created earlier. ![](https://storage.crisp.chat/users/helpdesk/website/cc18bc9ffe16e000/9_1y2dznb.png) **Connecting a virtual SIP client** The connection of the virtual SIP client will be based on the example of the Microsip program. You can download the program on this link: https://www.microsip.org/downloads ![](https://storage.crisp.chat/users/helpdesk/website/cc18bc9ffe16e000/10_mt69on.png) After installation run the program and open the drop-down menu and click "Add account". ![](https://storage.crisp.chat/users/helpdesk/website/cc18bc9ffe16e000/snimok-ekrana-2021-02-18-19463_1tkknby.jpg) A window with the settings will be opened, you need to fill in the following fields: Account name - the name SIP Server - the address of your SIP domain, it must be in this format - youdomain.sip.us1.twilio.com (for example, if you specified the SIP URI: mc-webmaster-1234, the domain will be mc-webmaster-1234.sip.us1.twilio.com) SIP Proxy - the same as for the SIP Server User name - the username specified in the Username in the Credential list section Domain - the same as for the SIP Server Login - the username specified in the Username in the Credential list section Password - the password specified in Password in the Credential list section The rest of the settings can be left as in the screenshot. Click "Save". ![](https://storage.crisp.chat/users/helpdesk/website/cc18bc9ffe16e000/frame-1_1onkfyr.jpg) After setting up the account, in case of a successful connection, the green icon (Online) in the lower left corner of the program should light up. Now you can make calls to rented numbers. Alternative programs for connecting a SIP client: [X-lite](https://www.counterpath.com/x-lite-download/) [Zoiper](https://www.zoiper.com/)