scope:

This draft ETS specifies the technical characteristics of equipment offering group 4 class 1 facsimile functions for attachment to the Integrated Services Digital Network (ISDN). The draft ETS is based upon CCITT Recommendation T.563 [1], "Terminal Characteristics for Group 4 Facsimile Apparatus" and CCITT Recommendation T.6 [2] , "Facsimile coding schemes and coding control functions for Group 4 facsimile apparatus".

This draft ETS is related to 5 other proposed ETSs on group 4 class 4 facsimile:

Draft prETS 300 080 Integrated Services Digital Network (ISDN); lower layer protocols for telematics terminals (T/TE 12-04)

NOTE: Draft prETS 300 080 includes an annex on testing.

Draft prETS 300 088 Integrated Services Digital Network (ISDN); facsimile group 4 class 1 equipment on the ISDN; General and service aspects (T/TE 05-06).

Draft prETS 300 112 Integrated Services Digital Network (ISDN); facsimile group 4 class 1 equipment on the ISDN; End-to-end protocols (T/TE 05-07).

Draft prETS 300 155 Integrated Services Digital Network (ISDN); facsimile group 4 class 1 equipment on the ISDN; End-to-end protocols tests (T/TE 05-08).

T/TE 05-10 Facsimile group 4 class 1 equipment on the ISDN; Terminal testing.

Field of application

This draft ETS covers group 4 class 1 equipment functionality only as defined in CCITT Recommendations T.563 [1] and T.6 [2] with the following restrictions:

a) Only black and white image types are considered i.e., foreground and background or set and unset pels according to CCITT Recommendation T.417 [6] "Open Document Architecture (ODA) and Interchange Format - Raster Graphics Content Architecture" terminology;

b) Only equipments connected to an ISDN in a circuit switched node, at both basic and primary rate, are considered (ISDN packet switched mode, Public Switched Telephone Network (PSTN), Circuit Switched Public Data Networks (CSPDNs), and Packet Switched Public Data Networks (PSPDNs) are not considered);

c) Only the Transport Layer procedure defined in section 5 of CCITT Recommendation T.70 [7] "Network-independent basic transport service for the Telematic services" is considered;

d) Only the Session control procedures defined in CCITT Recommendation T.62 [11] "Control procedures for Teletex and Group 4 facsimile service" or the directly equivalent stack of CCITT Recommendation X.225 and T.62bis [12] "Control procedures for teletex and group 4 facsimile services based on CCITT Recommendation X.215/X.225" are considered;

e) Only documents defined as Class B of the Formatted Document Architecture (FDA) of CCITT Recommendation T.412 are considered, i.e., facsimile documents;

f) Class A of FDA and basic teletex documents are not considered;

g) Only centre line page referencing I s considered i.e., number of pels per line divided by 2 (any further studies on this point may be reflected in a later edition of this standard).