Shared Line Option

[damiranz20]

Dear Sir, 

I am having an issue for my wireless Phone. Getting this error. My Boss want to shared a line to 9951 Telephone using his wireless Telephone. 

Cisco 7925G WirelessIP Telephone

ephone-dn  21  dual-line
 number 130
 label Engr. Aied
 name Engr. Aied
 shared-line sip - Invalid input detected

For Cisco 9951 IP Telephone

voice register dn  6
 number 130
 pickup-call any-group
 pickup-group 712
 name Engr. Aied
 shared-line max-calls 4
 label Engr. Aied
 mwi
!

This is my Cisco IOS version on my CCME.

Cisco IOS Software, C2900 Software (C2900-UNIVERSALK9-M), Version 15.1(4)M3, REL
EASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2011 by Cisco Systems, Inc.
Compiled Tue 06-Dec-11 17:09 by prod_rel_team

ROM: System Bootstrap, Version 15.0(1r)M15, RELEASE SOFTWARE (fc1)

Other thread is saying is we need to upgrade my IOS version to 15.2 but my manger refuse me to do it due to possible error or problems.

is there any other way to solve the issue? without upgrading the system?

Thanks,

Kael

[Nadeem Ahmed]

Hello Kael,

This is already answered in this thread

https://supportforums.cisco.com/discussion/12584316/shared-line-sip-option-not-working

Br,

Nadeem

[damiranz20]

Hi Nadeem, 

Yes I know.

I am looking for another option, is there any way to solve the issue without upgrading the IOS version. if the caller call for 130 extension the wireless telephone also ring. 

Thanks for your effort.