ADTRAN 1200221L1, Руководство пользователя

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Chapter 3. Operation
61200221L1-1 VCOM Module User Manual 3-9
points can be configured so that no silence frames are transmitted during
periods of relative silence. For compatibility with these devices, the
VCOM Module can be configured to expect that silence suppression is
Enabled ; thus, no frame relay traffic is generated during periods of silence.
Both voice endpoints must agree on the silence suppression setting. Refer to
Chapter 5, Dedicated Map and Dial Plan Menus, in the ATLAS Frame Relay
User Manual for more information.
» Connection
Read Security: 5
Helps identify a suspect VoFR device if a particular call reports poor qual-
ity. The displayed packet identifier and the dial plan endpoint identify the
call using this VoFR device.
» Frame Type
Read Security: 5
Displays the kind of frame ATLAS receives from the frame relay endpoint
connected to the VCOM channel, allowing users to monitor the kind of data
being carried on the network and processed by ATLAS. (ATLAS interprets
the most-recently received frame from the endpoint.)
During a voice connection, the frame type displays as Voice . For a FAX con-
nection, a variety of frame types display. Initially, Voice displays indicating
that although the call has completed, the answering FAX machine has not
yet announced its 2100HZ tone. After completing the 2100Hz, both FAX
endpoints repeat a V.21 and V.xx cycle for each page of the FAX document.
Each packet the VCOM Module receives from its connected frame relay
endpoint is classified into one of the following groups:
Blank No frame has yet been received from the endpoint, or a
FAX connection is between protocol states.
DTMF Dual-tone, multi frequency (DTMF) digit received.
Voice Receiving voice frames. A connection to a FAX end-
point shows a VOICE status until the FAX protocol is
established.
2100Hz tone FAX single-frequency tone detected indicating the
beginning of a FAX session.
V.21 FAX single-frequency tone detected indicating the
beginning of a FAX page.
V.27ter (2400 bps) FAX data reception of 2400 bps using protocol V.27ter.
V.27ter (4800 bps) FAX data reception of 4800 bps using protocol V.27ter.
V.29 (7200 bps) FAX data reception of 7200 bps using protocol V.29.
V.29 (9600 bps) FAX data reception of 9600 bps using protocol V.29.
V.33 (12000 bps) FAX data reception of 12000 bps using protocol V.33.
V.33 (14400 bps) FAX data reception of 14400 bps using protocol V.33.