To identify and describe the requirements on PTNXs/PABXs and UPT phase 1 to support UPT users at PABX (PTNX) extensions. Applicable to both the analogue and ISDN environments.
- Edition:
- 1
- Published:
- 09/01/1995
- Number of Pages:
- 13
- File Size:
- 1 file , 34 KB
- Note:
- This product is unavailable in Russia, Ukraine, Belarus
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