This Issue’s Topic: How to Network Between Extranet, Intranet, and Device Networks?
Many friends have asked multiple times, what are the extranet, intranet, and intelligent device networks? What projects will use them? How to design the network? Weak current projects cannot do without these networks.
In this issue, we will thoroughly understand how to design the networking case of a hospital regarding extranet, intranet, and intelligent device networks.
1
、Composition of Hospital Networks
The hospital computer network system is used to carry out daily medical services (HIS, LIS, PACS, RIS, finance, physical examination systems, etc.), and has the conditions for future expansion and bandwidth upgrades; it provides a reasonable and smooth hospital network security management software platform; it provides a stable, practical, and secure computer network with high bandwidth, large capacity, and high speed.
The hospital’s weak current main equipment room is located on the first floor of the administrative research building; aggregation rooms are set up on the second floor of the outpatient building, the first floor of ward building 1, the first floor of ward building 2, and the first floor of ward building 4, with the first floor of ward building 4 serving as a disaster recovery room.
The hospital has a total of three computer networks: extranet, intranet, and intelligent device network, with physical isolation between the three networks.
2
、How to Network Hospital Extranet, Intranet, and Device Networks
Hospital Network Room Planning:
1. Hospital Computer Extranet
The intranet carries the hospital’s critical business, using a 10G backbone and gigabit to the desktop. The core switches are connected using a dual-machine virtualization hot backup mechanism to achieve automatic failover. Access switches are linked with dual links and use virtualization configuration.
Hospital Internal and External Framework One
Hospital Internal and External Framework Two
2. Hospital Computer Extranet
The hospital extranet serves as the backbone network for internet access throughout the hospital, with many hospital external portal websites and systems open to the outside. The extranet uses a 10G backbone and gigabit to the desktop. The core design employs one 100G core switch, with critical module redundancy design (such as dual power supply redundancy) in the core switch.
Hospital Extranet Framework One
Hospital Extranet Framework Two
Considering the security protection needs of the extranet, comprehensive internal and external considerations set up exit gateways, firewalls, unified authentication systems, and network management systems, taking into account device compatibility and after-sales service, using the same brand as the core switch.
3. Hospital Computer Device Network
The device network mainly undertakes hospital video surveillance, ward television services, call systems, etc., requiring real-time and high-quality transmission in the network, using a 10G backbone and gigabit to the desktop. The core design employs one 100G core switch, with critical module redundancy design (such as dual power supply redundancy) in the core switch.
Hospital Device Network Framework One
Hospital Device Network Framework Two
4
、Deployment of Hospital Wireless Networks
Hospital wireless layout topology:
1. The central AP extends to the rooms via network cables, with modules connecting the intranet and extranet deployed in different rooms, with one module covering two room spaces.
2. The modules for the intranet and extranet are connected to the central AP via network cables, with independent planning and deployment for the intranet and extranet, achieving physical isolation of data.
Advantages:
Physical Isolation: Based on remote RF modules, central AP physical ports, and CPU division of intranet and extranet isolation technology.
Zero Packet Loss Roaming: Through a unique roaming algorithm across remote RF modules, terminal roaming is seamless, with zero packet loss.
Flexible Expansion: The central AP can be expanded to support RFID, Zigbee, Bluetooth, and other RF technology remote modules.
Easy Installation: Network cables can be extended 100 meters, with central AP PoE power supply, no need for wall drilling, and low renovation costs.
5
、Implementation of Hospital Network Wiring
Subsystems Involved in Structured Cabling:
1) Work Area Subsystem
2) Horizontal Subsystem
3) Vertical Subsystem
4) Management Subsystem
5) Equipment Management Room Subsystem
6) Building Group Subsystem
1. Planning of Equipment Rooms:
1. The weak current main equipment room is set on the first floor of inpatient building 1:
2. Aggregation rooms are set on the second floor of the outpatient building, the first floor of inpatient building 1, the first floor of inpatient building 2, and the first floor of inpatient building 4;
3. Among them, the first floor of inpatient building 4 is set as a disaster recovery room.
4. Each floor of each unit is set with 1 to 3 weak current rooms, connected to the aggregation room via 12-core multimode fiber, and the aggregation room is connected to the weak current room via two 12-core multimode fibers, with horizontal branches designed according to gigabit wiring standards to the desktop ports.
5. The administrative and research building has a shared cabinet for extranet and voice, while the intranet has a separate cabinet, with the intranet and extranet cabinets staggered. The remaining buildings have shared cabinets for intranet, extranet, and voice.
2. Wiring Point Principles:
1. The duty room is set with 1 group of information points: 1 intranet and 1 voice point;
2. Doctor’s offices are set with 1 intranet point for every 6-8 m2, with 1-2 phone points in each office.
3. Single patient rooms have 2 intranet points; double patient rooms have 3 intranet points; triple patient rooms have 4 intranet points; in addition, each room has 1 intranet point next to the TV information point.
4. Conference rooms are set with 2 groups of information points: 1 extranet, 1 intranet, and 1 voice point;
5. The surgical demonstration room is set with 1 group of information points:1 extranet, 4 intranet, and 1 voice point;
6. The operating room is set with 5 intranet points and 1 fiber point.
3. Use of Intelligent Electronic Wiring:
1. Intelligent electronic patch panel
2. Intelligent management unit
3. Management software
Intelligent wiring connects traditional wiring systems with intelligent management, through the electronic patch panel intelligent wiring system, automatically transmitting the architecture and changes of network connections to the system management software, the management system processes the received implementation information, allowing users to query the management system to understand the latest structure of the wiring system at any time. By fully electronic management of management elements, intuitive, real-time, and efficient paperless management can be achieved.
As a public place with dense human traffic, the horizontal cables use LSZH low-smoke halogen-free CAT6, and the vertical cables use LSZH low-smoke halogen-free OM3 multimode fiber.
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