| In force components |
Number
|
Title |
Status |
Q.553 (11/01)
� |
Transmission characteristics at 4-wire analogue interfaces of digital exchanges
�
|
In force
|
�
� |
| Superseded and Withdrawn components |
Number
|
Title |
Status |
Q.553 (11/88)
� |
Transmission characteristics at 4-wire analogue interfaces of a digital exchange
�
Replaces Q.507 (1984) and Q.517 (1984)
|
Superseded
|
Q.553 (01/94)
� |
Transmission characteristics at 4-wire analogue interfaces of digital exchanges
�
|
Superseded
|
Q.553 (11/96)
� |
Transmission characteristics at 4-wire analogue interfaces of digital exchanges
�
|
Superseded
|
