Panasonic KX-T336200 Installation Instructions Manual page 194

When deleting or changing the pre-assigned card type, the conditions should be the
followings:
The card status is OUS or Fault.
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However, if there exist port data, it is possible to change the cards as follows:
PLC card UHLC card
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SLC card WHLC card
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Deleting the ATLC card will be an error if there exist the following assignments:
"Trunk Group (TGl)",
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incoming Mode (Day) is set to "1 (ATT)."
Intercept Routing (Day) is set to nA (ATT)."
"Doorphone (DPH)",
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Doorphone Assignment is set to
Deleting the DISA card will be an error if there exist the following assignments:
"Trunk Group CrGl)",
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Incoming Mode (Day) is set to "4 (DISA)."
Incoming Mode (Night) is set to "4 (DISA)."
Deleting the HLC, SLC, LCOT or GCOT card will be an error if there is the following assignment to the slot
to be deleted:
"Power failure Transfer (PFT)
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See Section l-A-5.00 "Service Cards Description" for installing the cards in combination.
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