For activation-code onboarding of MPP phones, Cisco says to allow activation.webex.com through the firewall. Because newer phones default to activate.cisco.com, Cisco recommends allowing both domain names.
Checked 2026-10-02
Cisco recommends that you allow both the domain names through your firewall
- Vendor
- Cisco
- Product
- Cisco IP Phone Multiplatform Firmware
- Subsystem
- activation service
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Checked
- 2026-10-02
Sources
- Cisco IP Desk Phone with Multiplatform Firmware (MPP) Administration Guide - Provisioning — Cisco Systems · tier 2 current vendor documentation · Provisioning > Activation Code Onboarding
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting IP phones that do not get a voice VLAN or DHCP options: source note ip-phone-dhcp-vlan-troubleshooting-mpp-allow-activation. WarmTransfer. https://warmtransfer.net/knowledge/claims/ip-phone-dhcp-vlan-troubleshooting-mpp-allow-activation
BibTeX
@misc{warmtransfer-claim-ip-phone-dhcp-vlan-troubleshooting-mpp-allow-activation,
title = {Troubleshooting IP phones that do not get a voice VLAN or DHCP options: source note ip-phone-dhcp-vlan-troubleshooting-mpp-allow-activation},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/ip-phone-dhcp-vlan-troubleshooting-mpp-allow-activation},
note = {Source note ip-phone-dhcp-vlan-troubleshooting-mpp-allow-activation, checked 2026-10-02}
}