SIP & SCCP Phone flow CUCM

Here are some flows of a SIP & SCCP phone call. My purpose was to see is it really only digit-by-digit dialing even when the phone is on hook.

SCCP

on-hook dialing : EnBloc

off-hook dialing : Digit by Digit

SIP

type B on-hook dialing no dial-rules : EnBloc

type B off-hook dialing no dial-rules : Digit by Digit with KPML event

SCCP

Normal off-hook (Digit by Digit):

Normal on-hook : (Enbloc)

Delete a number while dialing, off hook :

Change number during dialing, on hook :

SIP

off-hook normal dialing :

off-hook with BackSpace during dialing :

on-hook normal :

on-hook with BackSpace :

When you use a SIP phone with Dial-rules, it’s Enbloc !

• Type A SIP Phones: Cisco Unified IP Phone models 7905, 7912, 7940 and 7960
• Type B SIP Phones: Cisco IP Phone models 79×1, 79×2, 79×5, 7970 and 7960

Type A phones only support enbloc dialing when using SIP firmware.

More information can be found at the Cisco site : https://supportforums.cisco.com/document/87236/working-concept-sccp-sip-phones-and-dial-rules