Dial Plan per specific line on W70B

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Hi All,

I'm attempting to set-up a dial plan on a W70B base station.

Line 1 is connected to a Swiss SIP provider, international code +41
Line 2 is connected to a French SIP provider, international code +33

I need to set-up a dial plan in order that all numbers dialed with +41.... are directed to Account Line 1 and all numbers dialed with +33... are directed to Account Line 2.

I've googled and search the forum but can't manage to find the solution, here is my current config settings, which does not work:

dialplan.digitmap.enable=0
account.X.dialplan.digitmap.enable=0
account.1.dialplan.digitmap.string = x41.T
account.2.dialplan.digitmap.string = x33.T

Any help would be greatly appreciated, thank-you so much.