If you're needing to be able to take more than one call simultaneously, which is what I think you're getting at (and thus why you had it an MCR before) then you're going to need to probably use a data TN as Sl1M1 suggested, and make it with two MARP'd SCR keys and short key hunt, then FDN/HUNT to wherever you'd like it to go afterwards.
e.g.
TN 0 0 1 16 (must be TN 16 or higher on a DLC)
CLS FLXA VCE
FDN xxxx
HUNT xxxx
LHK 1
Key 0 scr 4040 0 MARP
key 1 scr 6040 d MARP
Then both 4040 and 6040 need to go on your regular sets that need to answer these calls.
If you DON'T need to for x4040 to have multiple calls simultaneously, then a phantom 500 will work fine; I guess we're a bit confused about what you need...
-M
Matthew - Technical Support Engineer