SMB feature set

[shimaore]

Package the following:

• internal dialing (short numbers)
• call transfer
• ring multiple lines at once
• custom ring back tones
• on-hold music
• voicemail
• call transfer on no answer

->

• short numbers / internal dialing: via dial rules and dedicated local number_domain
• call transfer: REFER support in proxy, ..?
• ring multiple lines at once: proxy? number to multiple endpoints?
• custom ring back tones, moh: via dedicated profile
• voicemail, call transfer on no answer: already present, need to test in this context