Here is the information from Alchemy Series Product Update Bulletin 13
(I have it in pdf format in anybody wants a copy)
IP OFFICE PHONE MODULES WITH ALCHEMY BASE UNIT
COMPATIBILITY
Avaya is pleased to announce that IP Office Phone 8/16/30 modules can be used in conjunction with Network Alchemy base units. We have completed testing in order to prove the compatibility of the IP Office Phone 8, Phone 16 and Phone 30 modules when used in conjunction with the ArgentOffice and ArgentBranch base units.
The following software units were used:
• ArgentOffice 2.2 (1070)
• ArgentBranch 2.2 (1070) and 2.3 (25)
• IP Office Phone units 3.3 (30)
The following combinations were tested successfully.
ArgentOffice
2.2(1070)
ArgentBranch
2.2(1070)
ArgentBranch
2.3(25)
with
IP Office Phone 8
3.3(30)
IP Office Phone 16
3.3(30)
IP Office Phone 30
3.3(30)
This expansion module compatibility will greatly assist resellers in maintaining existing Alchemy sites with IP Office Phone 8, 16 or 30 modules should extra capacity be required. Additionally distributors now only require a single stock of Phone modules.
Similarly IP Office DT, So8 and WAN-3 expansion modules can be installed on customers’ sites with ArgentBranch or ArgentOffice base units. However please be sure to downgrade these DT, So8 or WAN-3 expansion modules to a build that corresponds with the existing Alchemy base
unit software i.e. 2.2 for the ArgentOffice/Branch or 2.3 for the ArgentBranch.