/mcpInteractions Feature If a Cisco Unified IP Phone that supports hold reversion shares a line with a phone device that does not support hold reversion, the hold reversion configuration settings display only for the line on the supporting device. If a shared line device disables the feature, hold reversion gets disabled on all other devices that share the line. Shared Lines If the ring settings that are configured for the phone specify Disabled, the phone does not ring, flash, or beep for the hold reversion feature. Ring Settings Hold Reversion Restrictions Restriction Feature Cisco Extension Mobility and Cisco Web Dialer features do not support the hold reversion feature. Cisco Extension Mobility and Cisco Web Dialer This feature does not support SCCP analog phone types, such as ATA 186, DPA-7610, and DPA-7630. Only certain on-net phone devices that are running SCCP on a node can invoke the hold reversion feature. SCCP phones If a directory number is associated to a phone that does not support hold reversion, the feature settings do not display for that directory number in the Directory Number Configuration window. Directory numbers If a Cisco Unified IP Phone that supports hold reversion shares a line with a phone device that does not support hold reversion, the hold reversion configuration settings display only for the line on the supporting device. If a shared-line device disables this feature, hold reversion gets disabled on all other devices that share this line. Shared lines Hold reversion ring uses the ring settings that Cisco Unified Communications Manager Administration defines for that user (disable, flash only, ring once, ring, beep only) except that flash gets converted to flash once, and ring gets converted to ring once. Note When an IP Phone call is on normal hold, the ring settings (Phone Idle) from the Call Manager is applied. Ring settings The maximum number of reverted calls on a line equals the maximum number of calls on your system. Maximum number of reverted calls Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 472 Receiving Calls Hold Reversion Restrictions