I. Project Overview
The communication system serves as the mission-critical infrastructure for modern tramways, enabling train dispatching, operational safety, and passenger services. It requires ultra-reliable real-time data transmission to support emergency response and passenger information delivery.
The system integrates industrial-grade switches to interconnect the control center with terminals (access control, CCTV, passenger information displays, signaling systems) and monitors track conditions across stations and routes.
Key Requirements:
1.High-density interfaces and high-performance switches
2.10Gbps high-speed redundant backbone network
3.Rapid network self-healing and centralized management
II. Solution
Comark CRS7228M Series Layer 3 10Gigabit Managed Industrial Ethernet Switches:
Control Center Deployment: 48*Gigabit + 6*10Gigabit ports for large-scale network connectivity, prioritizing bandwidth for signaling and access control systems.
Ⅲ. Equipment features and advantages:
1.
Port Configuration: 6*1G/10G SFP/SFP+ fiber ports + 48*10/100/1000Base-T auto-negotiation RJ45 ports.
Traffic Control: Unicast/multicast/broadcast storm suppression.
Link Aggregation: 8 static/dynamic LACP groups.
ACL Management: IPv4/IPv6/MAC binding-based access control.
Port Security: Port access policy configuration and real-time status monitoring.
Layer 3 Routing: IPv6 static routing, RIPng, OSPF.
Loop Prevention: STP/RSTP/MSTP, ERPS (Ethernet Ring Protection Switching).
IP Security: IGMP snooping, IPSG (IP Source Guard), dynamic ARP inspection.
VLAN Support: Port-based VLAN, IEEE 802.1Q VLAN, Voice VLAN, QinQ (VLAN double tagging).
Management Interfaces: WEB/HTTP/HTTPS/SSH/Telnet/SNMP/CLI/Console/ROM.
Port Configuration: 4*1G/10G SFP/SFP+ fiber ports + 24*10/100/1000Base-T auto-negotiation RJ45 ports.
Layer 2 Protocols: STP/RSTP/MSTP, ERPS for loop prevention and link redundancy.
VLAN: IEEE 802.1Q VLAN, Voice VLAN, QinQ.
Multicast: IGMP v1/v2, IGMP snooping for HD video surveillance and conferencing.
Port Security: Port isolation, broadcast storm suppression.
Management: Web GUI, CLI (Console/Telnet), SNMP v1/v2/v3.
Authentication: 802.1X, port/IP/MAC binding.
Encryption: HTTPS, SSLv3, SSHv1/v2.
Monitoring: RMON, syslog, port traffic statistics.
LLDP: Link-layer discovery protocol for topology mapping.
Diagnostics: CPU/memory monitoring, Ping, cable length detection.
Indicators: Power (PWR), system (SYS), port status (Link/Act).
PoE Ports: 8*IEEE 802.3at/af-compliant Gigabit PoE ports (15.4W/30W per port, total PoE budget: ≤245W).
Uplinks: 2*Gigabit SFP slots (supports 1000M SFP optical/electrical modules).
Management: Web, CLI (Telnet/Console), SNMP.
QoS & VLAN: Traffic prioritization, IGMP, IEEE 802.1Q VLAN.
Redundancy: RSTP, ERPS, CK-Ring (<20ms ring recovery).
Alarm Relay: Outputs for power, port, ring, and PoE status alerts.
Design: IP40-rated enclosure, industrial EMC compliance.
Power Input: 48–52V DC redundant dual power, reverse polarity protection (max load: 245W).
Mounting: DIN-rail installation.
