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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:
H 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.)
H 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.
H 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:
H The numbers: 0–9
H The lowercase letters: a–z
H The uppercase letters: A–Z
H The space (“ ”) character
H The ASCII symbols (in ascending order, based on the ASCII code)
H The End Of Line (EOL) symbol: ←
H 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.