Collection and publication as an ETR of former CEPT Recommendations (T/CS 49-xx) on L1 and L2 signalling systems for analogue inter-PABX lines
- Edition:
- 1.1.1
- Published:
- 11/01/1997
- Number of Pages:
- 233
- File Size:
- 1 file , 630 KB
- Note:
- This product is unavailable in Russia, Ukraine, Belarus
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