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Cisco Bug: CSCta93487 - H.323 Annex-M1 support on IOS required to interop with CUCM

Last Modified

Nov 20, 2018

Products (1)

  • Cisco 3800 Series Integrated Services Routers

Known Affected Releases


Description (partial)

Call from CUCM to IOS H.323 gateway fails.

IP Phone ---- CUCM ---- H.323 (QSIG tunneling) --- IOS H.323 gateway ---- TDM
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