Setting Up
5-69
9161-A2-GH30-30 April 1998

Table 5-14. Communication Protocol Options (3 of 3)

Communication Port Subnet Mask
Possible Settings: 000.000.000.000 – 255.255.255.255, Clear
Default Setting: 000.000.000.000
Specifies the subnet mask needed to access the unit when the port is configured as a
network communication link. The subnet mask is only in effect when the Communication
Port Use configuration option is set to Net Link (see Table 5-10).
000.000.000.000 – 255.255.255.255 – Shows the subnet mask for the node, which you
can view or edit.
Clear – Clears the subnet mask for the communication port and fills the address with
zeros. When the node subnet mask is all zeros (i.e., 000.000.000.000), the IP protocol
creates a default subnet mask based on the class of the IP address:
Class A: 255.000.000.000, Class B: 255.255.000.000, or Class C: 255.255.255.000.
Communication Port Link Protocol
Possible Settings: PPP, SLIP
Default Setting: PPP
Specifies the link layer protocol to use when the communication port is configured as a
network communication link.
PPP – Point-to-Point Protocol.
SLIP – Serial Line IP Protocol.
This protocol is only in effect when the Communication Port Use configuration
option is set to Net Link (see Table 5-10).
Alternate Communication Port IP Address
Possible Settings: 000.000.000.000 – 223.255.255.255, Clear
Default Setting: 000.000.000.000
Specifies the alternate IP address for the communication port. The Alternate IP Address
is used when a call attempt does not complete on the primary alarm/trap telephone
number contained in the Alarm directory and the alternate dial-out directory is used to
try another telephone number.
000.000.000.000 – 223.255.255.255 – Shows the communication port IP address,
which you can view or edit. The first digit (i.e.,
xxx
.255.255.255) cannot be 0 or 127, or
greater than 223. However, 000 is valid, representing a null address.
Clear – Clears the alternate IP address for the communication port and fills the address
with zeros (i.e., 000.000.000.000).
Alternate Communication Port Subnet Mask
Possible Settings: 000.000.000.000 – 255.255.255.255, clear
Default Setting: 000.000.000.000
Specifies the alternate subnet mask needed for the communication port. The alternate
subnet mask is used when a call attempt does not complete on the primary alarm/trap
telephone number contained in the Alarm directory and the alternate dial-out directory is
used to try another telephone number.
000.000.000.000 – 255.255.255.255 – View or edit the alternate subnet mask for the
node.
Clear – Clears the alternate subnet mask for the communication port and fills the
address with zeros (i.e., 000.000.000.000). When the alternate subnet mask is all zeros,
the IP protocol creates a default subnet mask based on the class of the IP address:
Class A: 255.000.000.000, Class B: 255.255.000.000, or Class C: 255.255.255.000.