CME SIP/SCCP shared line issue

[jevgep]

Hello,

1.There is 2 phones on CME - one of which run SIP, another one run SCCP.

2. There is shared line configured on SIP and SCCP phones

Problem:

1. Unable to resume call on SCCP phone when it is placed on hold on SIP phone.(other direction - resume on SIP phone works OK)

Below part of config relevant to problem:

!
voice register dn 2
number 111
shared-line
!
voice register pool 1
id mac 689C.E2E7.986A
type 9971
number 1 dn 2
!

!
ephone-dn 2
number 111
shared-line sip
!
!
ephone 1
mac-address 0023.5EB7.A176
type 7962
button 1:2
!

[Gregory Brunn]

Have you tried upgrading your phone firmware to latest version and CME to latest ios code and trying again. 

This does appear to be a supported feature.  Mixed shared lines looks like it was supported starting with version 9.

Hold and Resume

Calls on a mixed shared line can be put on hold like calls on a non-shared line. When a call is placed on hold, other phones with the shared-line directory number receive a hold notification so all phones sharing the line are aware of the call on hold. Any shared-line phone user can resume the call on hold. The ID of the call on hold is used by other shared-line members to resume the call. Notifications are sent to all associated phones when a call on hold is resumed on a mixed shared line. If the call is placed on hold as part of a conference or call transfer operation, the resume feature is not allowed.

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucme/admin/configuration/manual/cmeadm/cmebasic.html#concept_53442CE77E554FD6A63603A78F5C9436

If truly supported seems like buggy behavior to me.