Cucm: sip endpoint to analog callback feature

[alap84]

Hello 

Requirment is 

If an ip phones user (sip-7861) dial an sccp analog extensiom connected via vg320 and presses the callback softkey, will it work? If yes than how

Remember ip to ip callback is working,  analog to analog is working via shortcode but in between it gives callback is not active.  Press ok to exit the screen

Let me know if i am missing something 

CUCM # 11.5

VG-320 SCCP 

[Dennis Mink]

did you follow this:

  http://www.cisco.com/c/en/us/td/docs/ios/voice/fxs/configuration/guide/15_1/fxs_15_1_cg_book/fxscbbusy.pdf