Configure your Cisco Voice Gateway VG400, VG410, or VG420 in Control Hub

Publisher

Cisco

URL

https://help.webex.com/en-us/article/nj4t084/Configure-your-Cisco-Voice-Gateway-VG400,-VG410,-or-VG420-in-Control-Hub

Published

2026-02-03

Updated

unknown

Accessed

2026-09-24

HTTP status

200

License

Cisco copyright; all rights reserved; no-redistribution; short excerpts and locators only

Source notes citing this source

• Cisco lists uck9, securityk9 and webex_calling licenses as required on the VG4xx device for Webex Calling. in context
• Extensions assigned to VG4xx ports must have at least 4 digits to register with the Webex platform. in context
• For fax machines on a VG4xx port in Webex Calling, Cisco instructs enabling T.38 compression to override the default audio codec. in context
• Cisco's VG4xx Control Hub article lists IOS XE 17.18.1a as the supported firmware and states that site survivability support requires VG4xx IOS XE 17.16.1. in context
• FXO and ISDN interfaces on VG4xx gateways are not currently supported for use with Webex Calling. in context
• Users with a Webex Calling Standard license cannot be assigned to VG4xx device ports. in context
• Virtual lines cannot be assigned to a VG4xx ATA on Webex Calling, and a workspace or user may occupy only one line of a given VG4xx ATA. in context
• For Webex Calling, the VG400 ATA comes with 2, 4, 6 or 8 FXS ports, the VG410 with 24 or 48, and the VG420 with 84, 132 or 144, with 4- or 8-port expansion available on the 84 and 132 port VG420 models. in context
• The workspace or user selected when adding a VG4xx ATA in Control Hub is permanently assigned to ATA port 1. in context
• VG4xx ATA ports are numbered from 0 in Control Hub, unlike other ATAs whose ports are numbered from 1. in context
• VG4xx ATA failover to Webex Calling site survivability is available from VG4xx ATA version IOS XE 17.16.1. in context
• On VG4xx ATA release 17.18.1a, pushing a port configuration change from Control Hub while that port is active causes the port to deregister once the configuration file is processed; the documented remedy is to push the configuration again after the port is idle. in context
• Before onboarding a VG4xx ATA, run 'show version' to confirm the boot image is the Webex-approved version and that the configuration register is 0x2102; if changes are made, save with 'write memory' and reload. in context
• Remaining VG4xx ATA ports are assigned in Control Hub by opening Devices, selecting the VG4xx ATA, choosing Configure ports and adding the preconfigured users and workspaces. in context
• A VG4xx ATA is created in Control Hub under Devices > Add device by choosing Shared usage, then Existing workspace, selecting the workspace for port 1, choosing Cisco-managed device and the model, and entering the MAC address. in context
• For a workspace or user on a VG4xx ATA port to register successfully, its extension must contain at least 4 digits, whether it is extension-only or extension plus PSTN number. in context
• To use a VG4xx ATA outside Webex Calling after onboarding, the device must be reset to Cisco factory default settings. in context
• The firmware images listed as supported for VG4xx ATAs on Webex Calling are IOS XE 17.18.1a universalk9 images: vg400-universalk9.17.18.1a.SPA.bin, vg4x0-universalk9.17.18.1a.SPA.bin (VG410) and vg420-universalk9.17.18.1a.SPA.bin. in context
• FXO and ISDN interfaces on VG4xx models are not currently supported for use with Webex Calling; only FXS ports are used. in context
• For a VG4xx ATA port connected to an analog handset, hot-line functionality can be configured on the port in Control Hub. in context
• 'show license summary' on a VG4xx ATA must show three licenses before onboarding: uck9, securityk9 and webex_calling. in context
• Before onboarding, a VG4xx ATA is reached by connecting a computer to port GE 0/0/1, where the device presents its management web interface at 192.168.253.253 with an Administration > Command Line Interface page. in context
• Users with a Webex Calling Standard license cannot be assigned to VG4xx ATA ports. in context
• Virtual lines cannot be assigned to a VG4xx ATA. in context
• After the device management URL is set, the VG4xx ATA displays its MAC address; the documented order is to record it, add it to Control Hub, run 'write memory', connect port GE 0/0/0 to a network with DHCP and internet access, and wait about five minutes for the configuration to complete. in context
• When a VG4xx ATA cannot onboard, the documented checks are the device management URL, that the MAC address in Control Hub matches interface GE 0/0/0, and that all ports are on-hook as shown by 'show voice port summary'. in context
• A workspace or user can occupy only one line of a given VG4xx ATA. in context
• VG400 ATA models offer two, four, six or eight FXS ports; VG410 ATA models offer 24 or 48 FXS ports; VG420 ATA models offer 84, 132 or 144 FXS ports. in context
• The workspace or user selected when a VG4xx ATA is added in Control Hub is permanently assigned to ATA port 1. in context
• VG4xx ATA ports are numbered from 0, while other ATA ports are numbered from 1. in context
• For a VG4xx ATA port connected to a fax machine, enabling T.38 compression on the port overrides the default audio codec. in context
• When creating a workspace for a VG4xx ATA port, select 'Add a device later', assign the Webex Calling service with a license, and give it a telephone number or extension. in context
• A VG4xx ATA is pointed at Webex Calling by entering 'voice service voip' and then 'wxc-dm-url <Device Management URL>' in its command line interface; the URL is regional and the United States value is https://cisco.sipflash.com. in context
• After a VG4xx ATA is onboarded it can only be used with Webex Calling, and its earlier configuration, including the administrator password, is overwritten. in context

Cite this source record

APA

WarmTransfer. (2026, February 3). Configure your Cisco Voice Gateway VG400, VG410, or VG420 in Control Hub. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-help-nj4t084-configure-vg4xx

BibTeX

@misc{warmtransfer-cisco-help-nj4t084-configure-vg4xx,
  title  = {Configure your Cisco Voice Gateway VG400, VG410, or VG420 in Control Hub},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-help-nj4t084-configure-vg4xx},
  note   = {Cisco, accessed 2026-09-24}
}