Configuring Carrier Delay Times - 3Com 3C421600A Management Manual

138 C 10: A
HAPTER DVANCED
Configuring Carrier
Delay Times
M C
ODEM ONFIGURATION WITH
Establishing Error Control-only Connections
Use this setting to guard against the transfer of data at high speeds
without the reliability of error control. Modem disconnects (hang up on
call) if ARQ connection cannot be made.
Action
Establish Error Control ONLY
connections
V.42/MNP Negotiation Method
This method determines the error control handshaking mode. When set
to disable either V.42 or MNP, the modem only attempts to negotiate the
enabled protocol. If you know the remote modem does V.42, set to
Disable Detection Phase. The V.42 detection phase is skipped during the
handshaking process, allowing for a faster connection.
The commands used are ATS27.4 and ATS.27.5. See the Table 32 for
setting information.
Table 32 V.42 MNP Negotiation Method
ATS27.4=n
1
0
1
The defaults are to complete handshaking sequence (.4 and.5 = 0).
Carrier delay time is the amount of time the modem waits to disconnect
after detecting the absence of a carrier signal. These delay times allow
you to configure modems to handle specific situations, such as when a
modem string contains a pause code after disabling a call waiting service,
without disconnecting.
CLI/AT
COMMANDS
Command
AT&M5
ATS27.5=n Result
0 Disable MNP
1 Disable V.42
1 Disable Detection Phase
Default
AT&M4 (establishes
non-ARQ call)