ETSI I-ETS 300 310-1995 综合业务数字网(ISDN).1号数字用户信令系统(DSS1). 一般应用(基群速率接入,用户)数据链路层的部分协议执行额外测试信息的(PIXIT)形式规范
Integrated Services Digital Network (ISDN); Digital Subscriber Signalling System No. One (DSS1); Partial Protocol Implementation eXtra Information for Testing (PIXIT) Proforma Specification for Data Link Layer Protocol for General Application (Primary Rat