ITU-T Q.554-1996 Transmission Characteristics at Digital Interfaces of Digital Exchanges - Series Q: Switching and Signalling Digital Exchanges - Transmission Characteristics Study Group 15; 11 pp
The field of application of this Recommendation is found in Recommendation 4.500.
The signals taken into consideration are passed through the following interfaces as described in Recommendations Q.5 11 and Q.5 12 and Figure UQ.55 1.
ITU-T Q.554-1996 history
1996ITU-T Q.554-1996 Transmission Characteristics at Digital Interfaces of Digital Exchanges - Series Q: Switching and Signalling Digital Exchanges - Transmission Characteristics Study Group 15; 11 pp