Panasonic KX-NS700 Feature Manual page 382

4.1.1 SIP (Session Initiation Protocol) Trunk
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It is not recommended to send faxes to external service clients when using the PBX as a gateway.
Installation Manual References
4.4 Virtual Cards
8.4 SIP Trunks
PC Programming Manual References
9.2.2 PBX Configuration—[1-1] Configuration—Slot—System Property—Site
9.8 PBX Configuration—[1-1] Configuration—Slot—Shelf Property—V-SIPGW
9.10 PBX Configuration—[1-1] Configuration—Slot—Port Property—V-SIPGW
382 Feature Manual