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V.25 bis Command Set Operation
To invoke this command, type:
PRS DR ; n <LF>
where n is the DTE rate, as follows:
n
rate
0
Autobaud
1
Last connect speed
2
300 bps
3
1200 bps
4
2400 bps
5
4800 bps
6
7200 bps
7
9600 bps
8
12,000 bps
9
14,400 bps
10
16,800 bps
PRS HM
Handshake Mode
PRS HM selects the handshake mode.
Note
a.
When the modem is optioned for an external transmit clock source (PTM ; 1), the modem should
be optioned for a fixed — not an automatic — handshake mode (e.g., select V.32 bis only [PRS
HM ; 3] instead of V.32 bis automatic [PRS HM ; 2]). The modem will then handshake only at
the speed given to it by the DTE.
b.
For 1200 bps V.22 operation, select PRS HM ; 7. PRS HM ; 6 is an auto mode, so setting the
DTE to 1200 bps (PRS DR ; 3) will not force the connection to 1200 bps.
To invoke this command, type:
PRS HM ; n <LF>
where n is the handshake mode, as follows:
n
mode
0
V.34 auto (28.8 kbps to 300 bps)
1
V.34 only (28.8 kbps to 2400 bps)
2
V.32 bis automatic (14.4 kbps to 300 bps)
V.32 bis only (14.4 kbps to 4800 bps)
3
4
V.32 automatic (9600 bps to 300 bps)
5
V.32 only (9600 bps to 4800 bps)
V.22 bis only (2400 bps to 1200 bps)
6
7
V.22 only (1200 bps)
8
Bell 212 only (1200 bps)
9
Bell 103 only (300 bps)
10
V.21 only (300 bps)
5-6
n
rate
11
19,200 bps
12
21,600 bps
13
24,000 bps
14
26,400 bps
15
28,800 bps
16
38,400 bps
17
57,600 bps
18
76,800 bps
19
115,200 bps
20
128,000 bps
SpectraComm Dual V.34 Modem
Installation and Operation
Commanding the Modem
060R122-000
Issue 15
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