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This Recommendation was revised to remove text that referred to international analogue exchanges. The ITU-T no longer recommends the placement of new or continued operation of analogue international exchanges. Additionally, this Recommendation was written so as to recognize that both Plesiochronous Digital Hierarchy/Synchronous Digital Hierarchy (PDH/SDH) and digital ATM switching technology may be used in the PSTN. This Recommendation provides transmission performance planning guidance for digital exchanges.
| Author | ITU |
|---|---|
| Editor | ITU |
| Document type | Standard |
| Format | File |
| ICS | 33.040.35 : Telephone networks
|
| Number of pages | 13 |
| Replace | ITU-T G.142 (1988-11) |
| Year | 1990 |
| Document history | ITU-T G.142 (1998-12) |
| Country | Switzerland |
| Keyword | CCITT G.142;ITU-T 142;142;ITU-T G.142 |