Cordless Phone grabs Line 2 on KX-TDA30 system. Want Line 1

[VoiceDude]

A friend has a Panasonic KX-TDA30 installed in their home. On one of the KX-T7630 handsets, a cordless phone is connected. The cordless has a setup of when you dial 0, it grabs Line 2 to dial out. I would like to change this so it can grab Line 1, as Line 2 has been cancelled.
Is this a system setting or something that can be changed on the digital handsets from which the cordless is connected too. Any help on this will be very much appreciated. I have a voice background but not on Panasonic systems.

 

[cwc3]

turn that line off in programing.

 

[VoiceDude]

When you say turn off programming...where?
In system, which will need to be done by Panasonic technician, or through the handset from which the cordless is connected.
I have the feeling it is system programming, as it does this on all other handsets, when you dial o.

 

[cwc3]

easy way is zap your line 2 button on all phones

 

[VoiceDude]

Thanks for your help. System is installed at friends house. She called local support company and they helped her out over phone. Thx again