KX-TDA0290 ISDN Primary Rate Interface
23 ports per card, 23 B channels + 1 D channel. External channel service unit required. Supports 2 way DID. Supports Q.931 (QSIG) including Maters/Slave point to point TIE line.
1 card requires 1 free slot.
Compatible with KX-TDA600, KX-TDA100, KX-TDA200, KX-TDE100, and KX-TDE200.
Compatible with KX-TDA600, KX-TDA100, KX-TDA200, KX-TDE100, and KX-TDE200.