Yealink administrator guide
Yealink Administrator’s Guide for SIP-T2 & T3 & T4 & T5 & CP92X & CP935W IP Phones V86.60
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About this administrator guide
About the Administrator’s Guide for SIP-T2 & T3 & T4 & T5 & CP92X & CP935W IP Phones V86.60
The administrator guide for the Yealink CP935W and SIP-T23G: configuration, provisioning, security and feature setup (641 pages). This is version 86.60, last updated by Yealink on October 24, 2025, and you can read it right here or download it.
Some of the phones it covers (SIP-T23G) are end of sale or end of life. We still support them, and this document still applies.
SIP-T23G is end of sale. Support options, dates and replacementsWhat’s inside
- Before You Begin
- Related Documentations
- Recommended References
- Summary of Changes
- Changes for Release V86, Guide Version V86.60
- Changes for Release V86, Guide Version V86.15
- Changes for Release V86, Guide Version V86.5
- Changes for Release V85, Guide Version V85.2
- Changes for Release V85, Guide Version V85.1
- Getting Started
- Requirements
- Yealink IP Phones in a Network
- Initialization Process Overview
- Loading the ROM File
- Configuring the VLAN
- Querying the DHCP (Dynamic Host Configuration Protocol) Server
- Contacting the Provisioning Server
- Updating Firmware
- Downloading the Resource Files
- Verifying Startup
- Network Configurations
- IPv4 and IPv6 Wired Network Settings
- Wired Network IP Addressing Mode Configuration
- IPv4 Wired Network Configuration
- IPv6 Wired Network Configuration
- DHCP Option for IPv4
- Supported DHCP Option for IPv4
- DHCP Option 66, Option 43 and Custom Option
- DHCP Option 42, Option 2 and Option 100
- DHCP Option 12
- DHCP Option 120
- DHCP Option 60
- DHCP Option for IPv6
- Supported DHCP Option for IPv6
- DHCP Option 59 and Custom Option
- VLAN
- LLDP Configuration
- CDP Configuration
- Manual VLAN Configuration
- DHCP VLAN Configuration
Phones covered
Yealink phones this administrator guide covers
Related
More Yealink admin guides
FAQ
Questions about this document
Quick answers, and The Tech Team™ is a call away if you need more.
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Yealink and Yealink product names are trademarks of Yealink Network Technology Co., Ltd. Product information, images and documents are published by Yealink and provided here for reference by smplVoice. Firmware and documents are Yealink’s original, unmodified files.