Source note · Cisco IP phone registration and TFTP and ITL and CTL
SCCP phones, SIP phones and gateways request a configuration file from TFTP when they initialize, and an updated configuration file is sent when the device configuration changes.
Checked 2026-09-24
SCCP phones, SIP phones and gateways, request a configuration file when they initialize.
- Vendor
- Cisco
- Product
- Cisco Unified Communications Manager
- Subsystem
- TFTP
- Deployment
- on-premises
- Region
- not restricted
- Release range
- Release 15 and SUs
- Checked
- 2026-09-24
Sources
- System Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Configure TFTP Servers — Cisco Systems · tier 2 current vendor documentation · Configure TFTP Servers chapter, TFTP overview, first paragraph
Cite this note
APA
WarmTransfer. (2026, September 24). Cisco IP phone registration and TFTP and ITL and CTL: source note cisco-phone-registration-config-request-at-init. WarmTransfer. https://warmtransfer.net/knowledge/claims/cisco-phone-registration-config-request-at-init
BibTeX
@misc{warmtransfer-claim-cisco-phone-registration-config-request-at-init,
title = {Cisco IP phone registration and TFTP and ITL and CTL: source note cisco-phone-registration-config-request-at-init},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cisco-phone-registration-config-request-at-init},
note = {Source note cisco-phone-registration-config-request-at-init, checked 2026-09-24}
}