Troubleshoot Music On Hold Failure When Gateway is Integrated Service Router 4431

Publisher

Cisco Systems

URL

https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-communications-manager-callmanager/212640-troubleshoot-music-on-hold-failure-when.html

Published

2018-01-04

Updated

unknown

Accessed

2026-09-30

HTTP status

200

License

Cisco proprietary; all rights reserved; no-redistribution; short excerpts and locators only

Source notes citing this source

• With multicast MOH and an ISR 4431 gateway, external callers on hold hear silence because the gateway discards MOH RTP that does not match the media address in signalling; the documented fix is to set the Cisco CallManager clusterwide service parameter Duplex Streaming Enabled to True, with no service restart required. in context

Cite this source record

APA

WarmTransfer. (2018, January 4). Troubleshoot Music On Hold Failure When Gateway is Integrated Service Router 4431. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-technote-212640-moh-isr4431

BibTeX

@misc{warmtransfer-cisco-technote-212640-moh-isr4431,
  title  = {Troubleshoot Music On Hold Failure When Gateway is Integrated Service Router 4431},
  author = {{WarmTransfer}},
  year   = {2018},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-technote-212640-moh-isr4431},
  note   = {Cisco Systems, accessed 2026-09-30}
}