Paradyne COMSPHERE 3920PLUS Series, Technical Reference Manual

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Configure Branch
5-23 3920-A2-GH30-40 October 1998
Table 5-3
(2 of 3)
Dial Line Configuration Options — Multiport Mode
l
Dial Tx Level: Permissv(–9)
Nxt Permissv(–9) –10 –11 –12 –13 –14 –15 –16 –17 –18 –19 –20 –21 –22 –23 –24 –25 –26 –27 –28 –29
–30 –31 –32
Dial Transmit Level. Selects the modem’s transmit power level over dial lines. The transmit output level can be selected
in 1 dBm decrements from –9 dBm to –32 dBm.
NOTE: In North America the range of allowable values is –10 dBm to –32 dBm, plus Permissive (–9 dBm). This
configuration option is locked in other countries (the user cannot change the level).
NOTE: The factory default setting is country dependent. Default is Permissv(–9) in North America.
Train Time: Long
Nxt Long Short
Train Time. Controls V.34 and V.32 family train time. Determines whether minimum or maximum time durations are used
during the handshaking sequence for both dial and 4-wire/2-wire leased-line applications.
Long – Selects long train. Use this setting whenever far-end frequency offset (phase roll) may be encountered. This is
usually only required when transmitting over satellite links.
Short – Allows the modem to train-up faster when using V.32terbo, V.32bis, or V.32 modulation.
V34 Symbol Rate: Automatic
Nxt Automatic 3429H 3429L 3200L 3200H 3000L 3000H 2800L 2800H 2743L 2743H 2400L 2400H
This configuration option only appears when V.34 is enabled.
V.34 Symbol Rate. Selects the symbol (or baud) rate to be used when operating with V.34 modulation on either dial or
leased lines.
Automatic – The modem automatically determines the top symbol rate that can be supported by the current line
conditions. This is the only setting that is compliant with the V.34 specification, and should not be changed unless
unusual line conditions exist.
3429L, 3200L, 3000L, 2800L, 2743L, 2400L – Fixed symbol rate with low carrier signal.
3429H, 3200H, 3000H, 2800H, 2743H, 2400H – Fixed symbol rate with high carrier signal (100 Hz above low carrier
signal).
V.34 Precoder: Disable
Nxt Disable Enable
This configuration option only appears when V.34 is enabled.
V.34 Precoder. Determines whether the V.34 Precoder is used when operating with V.34 family modulation on either dial
or leased lines. The V.34 Precoder improves performance under certain unusual line conditions, i.e., low harmonic
distortion, single frequency interference.
Disable – Do not use the V.34 Precoder.
Enable – Use the V.34 Precoder.