On the Cisco Wireless Phone 9821, the audible MWI (stutter dial tone) only takes effect when Dialing Mode is set to Off-hook Dialing on the Phone Configuration page.

Checked 2026-09-25

As a prerequisite, set Dialing Mode to Off-hook Dialing on the Phone Configuration page. Otherwise, this setting does not take effect.
Vendor
Cisco
Product
Cisco Wireless Phone 9821 on Unified CM
Subsystem
MWI policy
Deployment
on-premises
Region
not restricted
Release range
current as of 2026-09-25
Checked
2026-09-25

Sources

Cite this note

APA

WarmTransfer. (2026, September 25). Message waiting indicator troubleshooting: source note mwi-troubleshooting-9821-audible-offhook. WarmTransfer. https://warmtransfer.net/knowledge/claims/mwi-troubleshooting-9821-audible-offhook

BibTeX

@misc{warmtransfer-claim-mwi-troubleshooting-9821-audible-offhook,
  title  = {Message waiting indicator troubleshooting: source note mwi-troubleshooting-9821-audible-offhook},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/mwi-troubleshooting-9821-audible-offhook},
  note   = {Source note mwi-troubleshooting-9821-audible-offhook, checked 2026-09-25}
}

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