Dear Sir For active a new ISDN service on IRAN Telecommunicate Center, I want to active a KX-TDA0290 - PRI (30 channel) CARD on KX-TDA100, but in IRAN have 3 model of this cards. KX-TDA0290CJ, KX-TDA0290CE and KX-TDA0290XJ. I want to know, what is the difference between of this three model and which model compatible whit ISDN Euro standard and signaling No. 7 ISDN protocol. Best Regards Homayoon Payrovan
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