Chapter 3. Operation
61200312L1-1
VCOM Module User Manual
3-7
F
RAME
T
YPE
Read Security: 5
Displays the kind of frame the ATLAS 550 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 the ATLAS 550.
(The ATLAS 550 interprets the most-recently received frame from the end-
point.)
During a voice connection, the frame type displays as
V
OICE
. For a FAX con-
nection, a variety of frame types display. Initially,
V
OICE
displays indicating
that although the call has completed, the answering FAX machine has not
yet announced its 2100 HZ tone. After completing the 2100 Hz, 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 end-
point is classified into one of the following groups:
B
LANK
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.
V
OICE
Receiving voice frames. A connection to a FAX endpoint shows a VOICE sta-
tus until the FAX protocol is established.
2100H
Z TONE
FAX single-frequency tone detected indicating the beginning of a FAX ses-
sion.
V.21
FAX single-frequency tone detected indicating the beginning of a FAX page.
V.27
TER
(2400
BPS
)
FAX data reception of 2400 bps using protocol V.27ter.
V.27
TER
(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.
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