Panasonic KX-TDE0110 16-Channel DSP Card: includes: 4 IP Trunks x 8 IP Phones Max: 32 x 64 plus 128 SIP Exts. Compatible with KX-TDE100, KX-TDE200, KX-TDE600, KX-NCP500, KX-NCP1000 Panasonic Phone Systems Comes with connection for 4 IP Trunks and 8 IP PhonesAbility to add SIP Trunks Ability to add Gateway Trunks to Network.