Lucent Technologies PortMaster - Manual (Page 108)

Configuring WAN Port Settings
6-6 PortMaster Configuration Guide
You can substitute any of the following for Speed:
Setting Modem Control
When modem control is on, the PortMaster uses the condition of the carrier detect
(DCD) signal from an attached modem to determine whether the line is in use.
Modem control is off for synchronous connections by default. With modem control set
off, the PortMaster assumes the carrier detect line is always asserted. Table 6-2 describes
the effects of DCD condition on port behavior.
Set modem control on only if you want to use the DCD signal from the attached device.
In general, set modem control on for network dial-in or dial-out configurations. Modem
control is usually off for leased line or Frame Relay connections, but you can use it if the
CSU/DSU is configured accordingly.
To set modem control, use the following command:
Command> set W1 cd on|off
9600 19200 56000 64000 115200 1536k t1 e1
14400 38400 57600 76800 1344k 2048k t1e
Table 6-2 Effects of Carrier Detect Condition on Port Behavior
Connection Type Carrier Detect Asserted Carrier Detect De-asserted
Hardwired Port attempts to establish a
network connection. Port is unavailable.
Dialin PortMaster initiates
authentication and displays a
login prompt. Port is unavailable.
Dialout No effect. Transition from asserted to de-
asserted resets the port.
Twoway Port attempts to establish a
network connection. Port is available.