NEC SL2100 How to change frequency of Intercom Dialtone and Ringback tone from keyphone or Computer

NEC SL2100 How to change frequency of Intercom Dialtone and Ringback tone from keyphone or Computer If you liked this video pls give a big thumbs up 👍 subscribe and if you prefer this pls share ↗️ and press the bell icon for the latest updates🔔 --subscribe to our channel-- https://www.youtube.com/c/TELECOMGURU... ​ OUR WEBSITE: 💻 http://bit.ly/TELECOMGURU ​ Be a part of Telecom Guru family by following us on Instagram:   / telecomgurusanj.  . ​ Facebook:   / ariesinterlink   ​ for business inquiries mail us on [email protected] -------Products I use (buy from amazon)--------- mobile phone: https://amzn.to/366ghw5 ​ tripod: https://amzn.to/2Y746ed ​ mic: https://amzn.to/2MiQQRb ​ ring light: https://amzn.to/2KKXIGy ​ micro sd card: https://amzn.to/3iFiN1r ​ green screen with stand : https://amzn.to/3iGkL1D music credits: Music: Another time Musician: LiQWYD link:    • Another Time   Disclaimer Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favour of fair use. __thanks for watching_