![Ringtone / Telephone / Public switched telephone network / Foreign exchange service / Voice interface card / Telephony / Plain old telephone service / Business telephone system Ringtone / Telephone / Public switched telephone network / Foreign exchange service / Voice interface card / Telephony / Plain old telephone service / Business telephone system](https://www.pdfsearch.io/img/078add90f577f1858df1f1f62b840dc3.jpg)
| Document Date: 2014-05-16 01:17:17 Open Document File Size: 829,75 KBShare Result on Facebook
Company CTC UNION TECHNOLOGIES CO. LTD. / / IndustryTerm telephone voice transmission / telephone line / telephone device / / Organization CTC Union / Federal Communications Commission / / Technology PBX / SNMP / RJ-11 / PSTN / /
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