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COMSPHERE 3800 Series Modems
9-26 September 1998 3810-A2-GB30-30
Table 9-4
(2 of 3)
Dial Line Configuration Options
V32bis Autorate: Enable
Nxt Enable Disable StartAt48 StartAt96
Enable – Once connected, the modem automatically lowers the line rate if line conditions become impaired. When line
conditions improve, the modem automatically shifts up to the highest data rate the line can support. This autorating only
occurs between 14,400 bps and 4800 bps during V.32/V.32bis connections.
Disable – Line rate does not vary.
StartAt48, StartAt96 – Useful for lines with known noise problems, these settings cause the modem to connect at
4,800 bps (StartAt48) or 9,600 bps (StartAt96). If line conditions warrant it, the modem shifts up to the next higher rate
until 14,400 bps or the highest possible rate for the line is reached.
The factory default is Enable.
AT command for V.32bis Autorate is S-register S76 = n, where n is 0 for Enable, 1 for Disable, 2 for StartAt48, and 3 for
StartAt96.
Dial TX Level: Permissv(–9)
Nxt Permissv(–9) –10 dBm –11 dBm –12 dBm –13 dBm –14 dBm –15 dBm –16 dBm –17 dBm
–18 dBm –19 dBm –20 dBm –21 dBm –22 dBm –23 dBm –24 dBm –25 dBm –26 dBm –27 dBm
–28 dBm –29 dBm –30 dBm –31 dBm –32 dBm ETC 1.0_Cell ETC 1.1_Cell
Dial Transmit Level. Sets the power output level of the transmit signal over dial lines.
Permissive (–9 dBm) – The modem transmits data at approximately –9 dBm.
ETC 1.0_Cell – Valid only if Enhanced Throughput Cellular (ETC) is installed. Transmit level is automatically adjusted in
response to line conditions according to the proprietary ETC 1.0 specification. Use only with remote modems set to ETC
1.0_Cell, and limit the data rate to 4800 bps.
ETC 1.1_Cell – Valid only if ETC is installed. Transmit level is automatically adjusted in response to line conditions
according to the proprietary ETC 1.1 specification.
The factory default is Permissv(–9).
AT command for Permissive mode is &J0.
AT commands for –10 through –32 dBm are &I10 through &I32.
AT command for ETC 1.0_Cell is &I99.
AT command for ETC 1.1_Cell is &I100.
V22b Guard Tone: Disable
Nxt Disable 550Hz 1800Hz
V.22bis Guard Tone. Determines whether the V.22bis guard tone is disabled, set to 550 Hz, or set to 1800 Hz.
Disable – No guard tone.
550 Hz or 1800 Hz – When the modem is in Answer mode, it transmits the guard tone at this frequency.
The factory default is Disable.
AT command to disable is &G0. AT command for 550 Hz is &G1.
AT command for 1800 Hz is &G2.