1. 3CX VOIP System Overview

3CX VOIP System Overview => https://www.3cx.com/user-manual/

1. Web Client
1. Web Client User Guide => https://www.3cx.com/user-manual/web-client/
2. Web Client Video Conferencing => https://www.3cx.com/user-manual/video-conferencing/

2. Yealink Desktop Phones
1. Make a Call => https://www.3cx.com/blog/voip-howto/make-calls-yealink-t48-t46/
2. Transfer a Call (Blind Transfer or Attended Transfer) => https://www.3cx.com/blog/voip-howto/blind-attended-transfer-yealink-t48-t46/
3. Checking Voicemail => https://www.3cx.com/blog/voip-howto/voicemail-yealink-t48-t46/
4. Creating 3-Way Conference Calls =>  https://www.3cx.com/blog/voip-howto/conference-yealink-t48-t46/
   
   
3. Mobile Apps
1. Android

1. 1. 1. iOS Overview Guide & Video => https://www.3cx.com/user-manual/installation-android/
      2. How to never miss a call on Android => https://www.3cx.com/blog/docs/android-troubleshooting-guide/
      3. Android Tips & Tricks => https://www.3cx.com/blog/docs/android-tips-tricks/

2. iOS

1. 1. 1. iOS Overview Guide & Video =>  https://www.3cx.com/user-manual/installation-iphone/
      2. iOS Tips & Tricks => https://www.3cx.com/blog/docs/tips-tricks-ios-app/
      3. iOS Video Call => https://www.3cx.com/blog/docs/ios-app-video-call/
      4. iOS Chat => https://www.3cx.com/blog/docs/chat-ios-app/

Supplementary Guides:

• Simple Troubleshooting of the 3CX Apps  => https://www.3cx.com/blog/docs/apps-troubleshooting-end-users/
• BYOD & WFH => https://www.3cx.com/blog/docs/byod-work-from-home/

2. 3CX Quick Reference Guide

http://otis.semissourian.com/directory/3CX_Quick_Ref_Print_EN.pdf

3. Cisco Phone System Manual

http://otis.semissourian.com/directory/phone_manual.pdf

4. CPH Phone Directory

http://otis.semissourian.com/directory/directory.pdf

5. Rust Communications Directory