Source note · SRST on Cisco IOS XE
For SRST/E-SRST 14.3, the ISR 4321 supports up to 50 phones and 200 phone lines (the same as the ISR 1100).
Checked 2026-09-25
- Vendor
- Cisco
- Product
- Cisco Unified SRST
- Subsystem
- platform-limits
- Deployment
- on-premises
- Region
- not restricted
- Release range
- Unified SRST 14.3
- Checked
- 2026-09-25
Sources
- Unified SRST/E-SRST 14.3 Supported Firmware, Platforms, Memory, and Voice Products — Cisco Systems · tier 2 current vendor documentation · Platform capacity table > rows Cisco ISR 1100, Cisco ISR 4321
Cite this note
APA
WarmTransfer. (2026, September 25). SRST on Cisco IOS XE: source note srst-configuration-limit-isr4321. WarmTransfer. https://warmtransfer.net/knowledge/claims/srst-configuration-limit-isr4321
BibTeX
@misc{warmtransfer-claim-srst-configuration-limit-isr4321,
title = {SRST on Cisco IOS XE: source note srst-configuration-limit-isr4321},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/srst-configuration-limit-isr4321},
note = {Source note srst-configuration-limit-isr4321, checked 2026-09-25}
}