Definity Expansion Modules Definity TN2224B 24 DCP Port Circuit Card $90.29 Definity TN767E DS1 / ISDN Trunk Circuit Card $81.89 Definity TN754C 8 Port Digital Station Circuit Card $81.89 Definity TN746B 16 Port Analog Circuit Pack $46.19 Definity TN763D Auxiliary 4 Trunk Circuit Card from $163.34 Definity TN747B Central Office 8 Trunk Circuit Card $67.19 Definity TN753B Direct Inward Dial 8 Trunk Circuit Card $71.39 Definity TN2181 16 Port Digital Station Circuit Card $46.19 Definity TN2224CP 24 Port Digital Station Circuit Card $176.39 Definity TN464GP Universal DS1 / ISDN Trunk Circuit Card $281.39
