Source note · PRI and TDM gateway interworking
The last date of support and the end of vulnerability and security support for those ISR 4000 models is 2028-11-30; software maintenance releases ended 2025-08-31.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- ISR 4000 Series
- Subsystem
- lifecycle
- Deployment
- on-premises
- Region
- not restricted
- Release range
- as announced 2022-11-07
- Checked
- 2026-09-24
Sources
- End-of-Sale and End-of-Life Announcement for the Cisco ISR4200, ISR4300 and select ISR4400 Series Platform — Cisco Systems · tier 2 current vendor documentation · Milestones table: End of SW Maintenance, End of Vulnerability/Security Support and Last Date of Support rows
Cite this note
APA
WarmTransfer. (2026, September 24). PRI and TDM gateway interworking: source note legacy-pri-tdm-isr4k-last-support. WarmTransfer. https://warmtransfer.net/knowledge/claims/legacy-pri-tdm-isr4k-last-support
BibTeX
@misc{warmtransfer-claim-legacy-pri-tdm-isr4k-last-support,
title = {PRI and TDM gateway interworking: source note legacy-pri-tdm-isr4k-last-support},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/legacy-pri-tdm-isr4k-last-support},
note = {Source note legacy-pri-tdm-isr4k-last-support, checked 2026-09-24}
}