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COMSPHERE 392xPlus Modems
4-22 November 1996 3920-A2-GN31-30
Dial Line — Multiport Mode l
The Dial Line configuration options are used to configure the modem for operation over dial lines.
Table 4-3 shows each Dial Line configuration option as it appears on the LCD, with the Sync
Leased factory default setting (the default value if the modem is just being installed) shown
following the colon ( : ) on the first line and with all available selections listed on the second line.
Following this is a description of the configuration option. Factory default settings are listed in
Appendix F.
Table 4-3
(1 of 2)
Dial Line Configuration Options — Multiport Mode l
Dial Modulation: V34
Nxt V34 V32_Family
Dial Modulation. Modulation reduces the amount of scrolling necessary to select Dial Line rates by limiting the number
of Dial Line Rate configuration options. Only one group of Dial Line rates is displayed depending on the setting of the
Dial Modulation configuration option (V.34, V.32bis, and V.32 terbo).
Dial Line Rate: 28800(V34)
Nxt 33600 28800(V34) 24000(V34) 19200(V34) 16800(V34) 14400(V34) 12000(V34) 9600(V34) 7200(V34)
4800(V34) 2400(V34) 19200(V32t) 16800(V32t) 14400(V32b) 12000(V32b) 9600(V32b) 7200(V32b)
4800(V32b)
Dial Line Rate. This configuration option determines the modem’s data rate and modulation scheme for operation on dial
lines. Online changes do not take effect until a disconnect occurs.
33600, 28800(V34), 24000(V34), 19200(V34), 16800(V34), 14400(V34), 12000(V34), 9600(V34), 7200(V34),
4800(V34), 2400(V34) – The modem operates using V.34 modulation at the data rate selected.
19200(V32t), 16800(V32t), 14400(V32b), 12000(V32b), 9600(V32b), 7200(V32b), 4800(V32b) – The modem operates
using V.32bis or V.32 terbo modulation at the data rate selected.
Autorate: Enable
Nxt Enable Disable StartAt48 StartAt96
Autorate. 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 19,200 bps and 4800 bps during V.32, V.32bis, and V.32 terbo connections, and 33.6 to 2400 for V.34.
Start at 48 and Start at 96 – Set the maximum connect rate for V.32, V.32bis, and V.32 terbo connections.
V32bis Override: Disable
Nxt Disable 2400
This configuration option is ignored unless Dial Line Rate is 4800(V32b).
V.32bis Override. Activates the Paradyne Point-to-Point Diagnostic 2400 bps modulation. Allows the modem to use a
non-standard, point-to-point modulation capable of secondary channel diagnostics while running at 2400 bps.
NOTE: This configuration option must be the same in both the local and remote modems.