APPENDIX E — NMEA I/O AGENTAs described in section 3.10 I/O Settings of this User Manual, the Vanguard 3000 router supports the following I/Os:• Vanguard 3000 Input Status: Ignition Sense, Main Voltage Indication and Modem Temperature.• Two general-purpose external analog input lines.• Two general-purpose external digital input lines.• Two general-purpose external digital outputs (relay-driven contact closures).The Vanguard 3000 I/O agent subsystem is configured via the Vanguard 3000 Web interface. Status monitoring isprovided via an NMEA-based protocol. The Vanguard 3000 I/O subsystem operates according to a manager/agentmodel. The manager sends requests to the Vanguard 3000 I/O agent, which performs the required actions. TheVanguard 3000 agent reports alarms and indications to the manager.SPECIFICATIONSCommunication ModelThe Vanguard 3000 I/O subsystem operates according to a manager/agent model.→ The manager sends requests to the Vanguard 3000 I/O agent, which performs the required actions.← The Vanguard 3000 agent also reports asynchronous events (alarms and indications) to the manager.PDU TransportTCP/IP: Exchanges between the manager applications and the Vanguard 3000 support TCP/IP.UDP/IP: Exchanges between the manager applications and the Vanguard 3000 support UDP/IP.Vanguard 3000 Series Multicarrier Cellular Data Modem & IP Router PN 001-7300-100 Rev. B | Page 115
