APPENDIX I
(to Recommendation Q.764)
Contents of the interface elements between
the ISDN user part and the SCCP
	These interface elements are defined in SCCP Recommendations (Q.711–Q.716) and are included here for information.
I.1	Contents of the REQUEST type 1
	The REQUEST type 1 interface element may contain the following parameters:
–	connection identification (for further study);
–	receipt confirmation selection;
–	expedited data selection;
–	quality of service parameter set.
I.2	Contents of the REQUEST type 2
	The REQUEST type 2 interface element may contain the following parameters:
–	network indicator (for further study);
–	protocol class;
–	credit;
–	connection identification (for further study);
–	source local reference;
–	originating signalling point code;
–	reply request;
–	refusal indicator.
I.3	Contents of the REPLY
	The REPLY interface element may contain the following parameters:
–	source local reference;
–	protocol class;
–	credit;
–	connection identification (for further study).