Operation
3-62 3160-A2-GB21-80
March 1999
6. Press F1 (Next) until the Com Port configuration option appears.
7. Select Enab to enable the COM port for the carrier-mounted DSU/CSU.
F1
Com Port:
Next Enab Disab
F2 F3
The carrier COM port provides the following functionality:
If configured for ASCII, only one ASCII device may be used for the carrier. (If
two COM ports are configured for ASCII, neither will work.)
If configured for Mgmt, each device in the carrier can support an Mgmt COM
port; however, each Mgmt COM port must be connected to a different subnet.
To facilitate IP data routing, the device with the closest link to the SNMP
manager or Telnet client should be configured as the IP Bus Master.
If configured for either ASCII or Mgmt, the carrier COM port may be
configured to control an external device (e.g., modem, x.25 PAD) through the
use of AT or user-specified commands.
The set of valid characters for control of the carrier external COM port device is
as follows:
The numbers: 0–9
The lowercase letters: a–z
The uppercase letters: A–Z
The space (“ ”) character
The ASCII symbols (in ascending order, based on the ASCII code)
The End Of Line (EOL) symbol: ←
The caret (‘‘^”) control character is used to select non-printable ASCII
characters. The caret ‘‘^” must be followed by one character which together
form the control sequence. Table 3-7 defines all of the available control
sequences.