Setting Up5-699161-A2-GH30-30 April 1998Table 5-14. Communication Protocol Options (3 of 3)Communication Port Subnet MaskPossible Settings: 000.000.000.000 – 255.255.255.255, ClearDefault Setting: 000.000.000.000Specifies the subnet mask needed to access the unit when the port is configured as anetwork communication link. The subnet mask is only in effect when the CommunicationPort 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 youcan view or edit.Clear – Clears the subnet mask for the communication port and fills the address withzeros. When the node subnet mask is all zeros (i.e., 000.000.000.000), the IP protocolcreates 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 ProtocolPossible Settings: PPP, SLIPDefault Setting: PPPSpecifies the link layer protocol to use when the communication port is configured as anetwork communication link.PPP – Point-to-Point Protocol.SLIP – Serial Line IP Protocol. This protocol is only in effect when the Communication Port Use configurationoption is set to Net Link (see Table 5-10).Alternate Communication Port IP AddressPossible Settings: 000.000.000.000 – 223.255.255.255, ClearDefault Setting: 000.000.000.000Specifies the alternate IP address for the communication port. The Alternate IP Addressis used when a call attempt does not complete on the primary alarm/trap telephonenumber contained in the Alarm directory and the alternate dial-out directory is used totry 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, orgreater than 223. However, 000 is valid, representing a null address.Clear – Clears the alternate IP address for the communication port and fills the addresswith zeros (i.e., 000.000.000.000).Alternate Communication Port Subnet MaskPossible Settings: 000.000.000.000 – 255.255.255.255, clearDefault Setting: 000.000.000.000Specifies the alternate subnet mask needed for the communication port. The alternatesubnet mask is used when a call attempt does not complete on the primary alarm/traptelephone number contained in the Alarm directory and the alternate dial-out directory isused to try another telephone number.000.000.000.000 – 255.255.255.255 – View or edit the alternate subnet mask for thenode.Clear – Clears the alternate subnet mask for the communication port and fills theaddress 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.
