ADTRAN 1200182L1, Руководство пользователя

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Chapter 3. Operation Async-232 Module Submenus
Configuration
3-14 Async-232 Module User Manual 61200182L1-1
Modem
Write security: 3; Read security: 5
Configures an allocated modem for incoming and outgoing analog modem
calls. Selected options are issued to the modem when it is allocated to answer
an incoming call or initiate an outgoing call. Some options imply a negotia-
tion with the remote modem. These modem options may also be specified
through the AT command interface if enabled.
Data 64K Directs the call control software to request an unrestricted 64 Kbps
circuit. The default call type for ISDN service is Data 64 Kbps.
Data 56K Directs the call control software to request a 64 Kbps data circuit
that is rate-adapted to 56 Kbps. It is intended for use in circum-
stances where interoperability with Switched 56 service is desired.
Audio Directs the call control software to request a 3.1 kHz audio circuit
as the bearer capability for outgoing calls. The Audio option is
used with an ISDN line configured for voice service. In some areas
audio service is less expensive than data service. Selecting an
Audio call type guarantees a digital end-to-end ISDN connection.
Speech Speech directs the call control software to request a Mu-law speech
circuit as the bearer capability for outgoing calls. The Speech
option is used with an ISDN line configured for voice service. In
some areas voice service is less expensive than data service. A
Speech call type does not guarantee an end-to-end digital connec-
tion with some local and long distance carriers.