This depends with Telco, will they recognize the *59
CM4.x has another feature called MCID which does the same thing but it only used Pri-net5. If you choose to look at Mcid, it's a little confusing as CM docs said it is support in PRI-NI2 and other popular signalings but then you look at the GW and it only supports Pri-net5 so u end up being stuck with net5.
hth