Fortinet white logo
Fortinet docs logo DOCUMENT LIBRARY
Fortinet white logo
Fortinet docs logo DOCUMENT LIBRARY
Products Best Practices Hardware Guides Products A-Z
Summary
By Solution
By 4D Pillars
By Cloud
Secure Networking
Unified SASE
Security Operations
Secure SD-WAN
Secure Access Service Edge (SASE)
ZTNA
LAN Edge
Identity and Access Management
Next Generation Firewall
Public Cloud
Private Cloud
FortiCloud
Secure Networking
  • Hybrid Mesh Firewall
  • NOC Management
  • LAN
  • WAN
    • More >>
    Unified SASE
  • Single Vendor SASE
  • Cloud Network Security
  • Secure Endpoint Connectivity
  • Web Application / API Protection
    • More >>
    Security Operations
  • Security Operations Automation
  • Identity
  • Early Detection & Prevention
    • More >>
    Secure Networking
  • Hybrid Mesh Firewall
  • NOC Management
  • LAN
  • WAN
  • Communication & Surveillance
    • Unified SASE
  • Single Vendor SASE
  • Secure Endpoint Connectivity
  • Cloud Network Security
  • Cloud-Native Security
  • Web Application / API Protection
    • Security Operations
  • Security Operations Automation
  • Endpoint
  • Data Protection
  • Identity
  • Email
  • Early Detection & Prevention
  • Expert Services
  • Edge Firewall
  • Orchestration & management
  • SD Branch
  • Application Delivery
  • Single Vendor SASE
  • Secure Endpoint Connectivity
  • Secure Private Access
  • Thin Edge
  • Identity
  • Application Gateway
  • Enterprise Asset Management
  • Endpoint Agent
  • Agentless Security Posture
  • Identity
  • Wireless
  • Switching
  • Identity
  • Privilege Acccess Management
  • Next Generation Firewall
  • Orchestration & management
  • Expert Services
  • All
  • All
  • Account Management
  • SAAS Management
  • SAAS Application Security
  • Managed Services
  • Platform as a service (PAAS)
  • Other SAAS Services
    • 4D Resources
    Solution Hubs
  • 4D Pillars
  • Cloud
  • Popular Solutions

    • FortiVoice Phone System Release Notes

    Home FortiVoice 6.4.0 FortiVoice Phone System Release Notes
    6.4.0
    7.0.5
    7.0.4
    7.0.3
    7.0.2
    7.0.1
    7.0.0
    6.4.10
    6.4.9
    6.4.8
    6.4.7
    6.4.6
    6.4.5
    6.4.4
    6.4.3
    6.4.2
    6.4.1
    6.4.0
    6.0.12
    6.0.11
    6.0.10
    6.0.9
    6.0.8
    6.0.7
    6.0.6
    6.0.5
    6.0.4
    6.0.3
    6.0.2
    6.0.1
    6.0.0
    5.3.26
    5.3.25
    5.3.24
    5.3.23
    5.3.22
    5.3.21
    5.3.20
    5.3.19
    5.3.18
    5.3.17
    5.3.16
    5.3.15
    5.3.14
    5.3.13
    5.3.12
    5.3.11
    5.3.10
    5.3.9
    5.3.8
    5.3.7
    5.3.6
    5.3.5
    5.3.4
    5.3.3
    5.3.2
    5.3.1
    5.3.0

    Firmware downgrade

    Firmware downgrade

    Firmware downgrade is not recommended. Before downgrading, consult Fortinet Technical Support first.

    If you do need to downgrade, follow the procedure below:

    Downgrading from 6.4.0 to 5.x.x release

    Downgrading from 6.4.0 to 5.x.x release is not supported in general. Before downgrading, consult Fortinet Technical Support first.

    If you do need to downgrade, follow these steps:

    1. Do not use exec restore image command.
    2. Use the G option in the bootloader to reburn the image.
    3. Exec factory reset.
    4. Restore the configuration.
    Previous
    Next

    Firmware downgrade

    Firmware downgrade

    Firmware downgrade is not recommended. Before downgrading, consult Fortinet Technical Support first.

    If you do need to downgrade, follow the procedure below:

    Downgrading from 6.4.0 to 5.x.x release

    Downgrading from 6.4.0 to 5.x.x release is not supported in general. Before downgrading, consult Fortinet Technical Support first.

    If you do need to downgrade, follow these steps:

    1. Do not use exec restore image command.
    2. Use the G option in the bootloader to reburn the image.
    3. Exec factory reset.
    4. Restore the configuration.
    Previous
    Next