Current system and licensing:

HQ:

CUCM 6.1, 1230 DLUs, 249 79XX phones, 24 ATAs, 20 IP Communicators, 60 Mobility Connection users

Unity 5.01, 270 VM licenses

UCCx 5.1, 10 Enhanced seats

NO UCSS

Branch 1:

CUCME 8.5 on 2851, 94 IP phones

CUE, 120 voicemail, 16 ports

Branch 2:

CUCME 4.3 on 2811, 36 IP phones

CUE, 35 voicemail, 8 ports

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The migration target:

CUCM 8.6

Unity Connection 8.6

Presence 8.6 for 30 users

SRST for branch

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My questions:

1) Migration to CUWL or UCL, which one is better for this customer?

2) Is UCL 3 and 9 Upgrade more cost-effective?

3) How can the CUCME phone license and CUE license be migrate to CUWL or UCL?

I am looking forward your helps.

Michael