[asterisk-ss7] SS7 Called Nature of Address Indicator - problem

[equis software]

In international calls (start with 00) it´s ok
In national call (starts with 0) it´s ok
but in subscriber call (don´t start wih 0) automatically set like 'national'

I´m using  Zaptel Version: 1.4.10.1
chan_ss7 1.2.1
asterisk 1.4.20.2

I found  ss7_internationalprefix = 00
ss7_nationalprefix = 0
ss7_subscriberprefix=0S
but zaptel doesn´t accept this configuration.
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