allow-connections sip to sip Error %Invalid input detected at '^' marker. at sip

[callshakeel]

I am trying to configure our router for sip to sip connecting using following command;

enable

configure terminal

voice service voip

allow-connections sip to sip

Getting error message

VG_C3745(conf-voi-serv)#allow-connections sip to sip

                                                                          ^
% Invalid input detected at '^' marker. at sip

Please tell me where is the problem.

[paolo bevilacqua]

May be an old, buggy image, update it.

[callshakeel]

Dear Paolo,

Thanks for response; I am sorry didn't get bcause i am not network specialist.

Please let me know how to update i mean command to update

Thanks,

[paolo bevilacqua]

You need to engage a network specialist, if you try yourself you will only collect frustration and loose time.