The Meizo RD588 series Dual SIM 4G Ethernet wireless router is designed to offer a failover 3G/4G network when the primary network fails. The router is using Broadcom chipset, integrated with WAN, LAN, SIM, VPN, VRRP, WiFi, and Serial port services, product line supporting the following radio access technologies: LTE, HSPA+, HSPA, UMTS, EDGE, CDMA2000, GPRS . By owning automatic connection monitoring and heartbeat detection, make sure the router to be always online.
The router is using Industrial Grade equipment design standards, passed CE and EMC test, stable and reliable. External antenna connectors make it possible to attach desired antennas and to easily find the best signal location. Multiple encryption protocols as L2TP, IPSec, PPTP and GRE are owned, making it ideal solution for applications in which high data bandwidth and strong stability is required.
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Main Features |
Hardware Specifications |
Software Functions |
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● Support public and private APN network |
CPU |
VPN |
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Model |
Frequency & Band |
Bandwidth(UL/DL) |
Consumption |
WiFi (-W) |
Serial(-S) |
Power |
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RD58A |
● FDD-LTE: 2100MHz(B1),1900MHz(B2), 1800MHz(B3), AWS(B4), 850MHz(B5), 2600MHz(B7),700MHz(B12),700MHz(B13), 800MHz(B20), 1900MHz(B25) , 850MHz(B26), 700MHz(B29), 2300MHz(B30), |
FDD-LTE:50Mbps/300Mbps |
Work:0.46A@12V DC |
802.11n 300Mbps Option |
RS232/RS485 Option |
US/EU standard |
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RD58C |
● FDD-LTE: 2100MHz(B1), 1800MHz(B3), 900MHz(B8) |
FDD-LTE:50Mbps/150Mbps |
Work:0.41A@12V DC |
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RD58E (Europe & Asia network) |
● FDD-LTE: 2100MHz(B1), 1800MHz(B3), 850MHz(B5), 2600MHz(B7), 900MHz(B8), 800MHz(B20) |
FDD-LTE:50Mbps/150Mbps |
Work:0.41A@12V DC |
|||
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RD58J |
● FDD-LTE: 2100MHz(B1), 1800MHz(B3), 850MHz(B5), 2600MHz(B7), 900MHz(B8), 800MHz(B18), 800MHz(B19), 1500MHz(B21), 700MHz(B28), |
FDD-LTE:50Mbps/300Mbps |
Work:0.46A@12V DC |
circuit switching(CS) vs packet switching(PS) networks | difference between circuit switching and packet switching
This page circuit switching vs packet switching describes difference between circuit switching(CS) and packet switching(PS).
This tutorial covers everything one like to know about networking basics including circuit switching vs packet switching, TCP/IP protocol fields, ARP/RARP protocol fields, what is IP address ,what is MAC address, networking devices which include hub, switch, bridge, router, gateway and firewall.
Circuit Switching
In circuit switching network dedicated channel has to be established before the call is made between users. The channel is reserved between the users till the connection is active. For half duplex communication, one channel is allocated and for full duplex communication, two channels are allocated. It is mainly used for voice communication requiring real time services without any much delay.
As shown in the figure 1, if user-A wants to use the network; it need to first ask for the request to obtain the one and then user-A can communicate with user-C. During the connection phase if user-B tries to call/communicate with user-D or any other user it will get busy signal from the network.
Packet Switching
In packet switching network unlike CS network, it is not required to establish the connection initially. The connection/channel is available to use by many users. But when capacity or number of users increases then it will lead to congestion in the network. Packet switched networks are mainly used for data and voice applications requiring non-real time scenarios.
As shown in the figure 2, if user-A wants to send data/information to user-C and if user-B wants to send data to user-D, it is simultaneously possible. Here information is padded with header which contains addresses of source and destination. This header is sniffed by intermediate switching nodes to determine their route and destination.
In packet switching, station breaks long message into packets. Packets are sent one at a time to the network. Packets are handled in two ways, viz. datagram and virtual circuit.
In datagram, each packet is treated independently. Packets can take up any practical route. Packets may arrive out of order and may go missing.
In virtual circuit, preplanned route is established before any packets are transmitted. The handshake is established using call request and call accept messages. Here each packet contains virtual circuit identifier(VCI) instead of the destination address. In this type, routing decisions for each packet are not needed.
Comparison between CS vs. PS networks
As shown above in Packet switched (PS) networks quality of service (QoS) is not guaranteed while in circuit switched (CS) networks quality is guaranteed.
PS is used for time insensitive applications such as internet/email/SMS/MMS/VOIP etc.
In CS even if user is not talking the channel cannot be used by any other users, this will waste the resource capacity at those intervals.
The example of circuit switched network is PSTN and example of packet switched network is GPRS/EDGE.
Following table summarizes difference between circuit switching and packet switching of type datagram and virtual circuit.
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Circuit Switching |
Packet Switching(Datagram type) |
Packet Switching(Virtual Circuit type) |
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Dedicated path |
No Dedicated path |
No Dedicated path |
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Path is established for entire conversation |
Route is established for each packet |
Route is established for entire conversation |
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Call setup delay |
packet transmission delay |
call setup delay as well as packet transmission delay |
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Overload may block call setup |
Overload increases packet delay |
Overload may block call setup and increases packet delay |
|
Fixed bandwidth |
Dynamic bandwidth |
Dynamic bandwidth |
|
No overhead bits after call setup |
overhead bits in each packet |
overhead bits in each packet |
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