DS/ETS 300115
Attachment to the Public Switched Telephone Network (PSTN) - Category II attachment requirements for 300 bits per second duplex modems standardized for use on the PSTN
| Organization: | DS |
| Publication Date: | 17 August 1993 |
| Status: | inactive |
| ICS Code (IT terminal and other peripheral equipment): | 35.180 |
scope:
This ETS specifies the technical characteristics to be offered by modems seeking Category II approval for duplex operation over the PSTN at 300 bits per second. The modulation scheme specified is that described in CCITT Recommendation V.21 [4]. The term "modem" in the context of this ETS includes all physical implementation practices for voice band modems which are galvanically connected to the PSTN. This ETS specifies two modes of operation: answer mode and call mode.
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