ITU-T G.703-2002
Physical/Electrical Characteristics of Hierarchical Digital Interfaces - Series G: Transmission Systems and Media@ Digital Systems and Networks Digital Terminal Equipments - General (Study Group 15; Erratum 1: Covering Note: 07/20/2005)

Standard No.

ITU-T G.703-2002

Release Date

2002

Published By

ITU-T - International Telecommunication Union/ITU Telcommunication Sector

Latest

ITU-T G.703-2002

Scope

This Recommendation provides the recommended physical and electrical characteristics of the interfaces at hierarchical bit rates as described in ITU-T Recs. G.702 (PDH) and G.707 (SDH)@ to enable the interconnection of digital network components (digital sections@ multiplex equipment@ exchanges) to form an international digital link or connection. The characteristics given in this Recommendation should be applied to new equipment (component) designs. NOTE 1 ?C The characteristics of interfaces at non-hierarchical bit rates@ except n ?? 64 kbit/s interfaces conveyed by 1544 kbit/s or 2048 kbit/s interfaces and 3152 kbit/s interface in North American hierarchy@ are specified in the respective equipment Recommendations. NOTE 2 ?C The jitter specifications contained in this Recommendation are intended to be imposed at international interconnection points. NOTE 3 ?C The interfaces described in clauses 5 to 12 correspond to the ports T (output port) and T??input port) as recommended for interconnection in ITU-R Rec. F.596-1 (Interconnection of digital radiorelay systems). NOTE 4 ?C For signals with bit rates of n ?? 64 kbit/s (n = 2 to 31) which are routed through multiplexing equipment specified for the 2048 kbit/s hierarchy@ the interface shall have the same physical/electrical characteristics as those for the 2048 kbit/s interface specified in clause 9. For signals with bit rates of n ?? 64 kbit/s (n = 2 to 23) which are routed through multiplexing equipment specified for the 1544 kbit/s hierarchy@ the interface shall have the same physical/electrical characteristics as those for the 1544 kbit/s interface specified in clause 5. NOTE 5 ?C The specifications contained in this Recommendation are related to the physical interface only (i.e. to characterize the line codes and input/output equipment interfaces); in particular@ the required frequency tolerances do not imply overall equipment performances which may be driven by tighter requirements in Recommendations for specific network/equipment applications (e.g. ITU-T Recs. G.813 and G.783).

ITU-T G.703-2002 history

• 2002 ITU-T G.703-2002 Physical/Electrical Characteristics of Hierarchical Digital Interfaces - Series G: Transmission Systems and Media@ Digital Systems and Networks Digital Terminal Equipments - General (Study Group 15; Erratum 1: Covering Note: 07/20/2005)