FAQ

Yes, C-Data Wireless Ap Ceiling type CW8837AP and outdoor type CW9833AP both meet 802.11ac standard.

A wireless AP (AP, Access Point, Wireless Access Point, Conversation Point, or Access Bridge) is a well-known name that includes not only simple wireless access points (wireless APs), but also wireless routers Gateway, wireless bridge) and other types of equipment collectively. It mainly provides wireless workstations for wired LAN and wired LAN access to wireless workstations, wireless access point within the coverage of wireless workstations can communicate with each other.

Simple wireless AP is a wireless switch that provides wireless signal transmission and reception functions. Simple wireless AP’s working principle is the network signal transmitted over twisted pair, after AP product compilation, the electrical signal is converted into a wireless signal sent out to form a wireless network coverage. According to different power, it can achieve different degrees and different ranges of network coverage, the maximum wireless AP coverage of up to 500 meters. Most simple wireless AP itself does not have the routing function, including DNS, DHCP, Firewall, server functions must have independent routing or computer to complete.

C-Data Wi-Fi6 ONU Series support Mesh. You are able to easy mesh with C-Data router products for extended coverage. Routers from other manufacturers are not guaranteed for the connectivity as it is not clear if the protocol is standardized.

C-Data Wi-Fi6 ONU supports for MU-MIMO and OFDMA, providing more capacity to handle more devices with low latency. Equipped with an xPON port, offering adaptive access for both EPON and GPON modes. With multiple models, each supporting interfaces for data, voice, CATV, and triple-play services.

Ethernet Over Coax also called EOC for short. It is an equipment which used for triple play service in a new generation broadcasting network. Widely used by consumers and telecommunications operators in existing 75 ohm coaxial cable installations (from cable television or CATV), to carry broadband data into and through the home, and into multiple dwelling unit (MDU) installations.

Data EOC network is built with EOC Master and EOC Slave.

Hybrid fiber-coaxial (HFC) is a telecommunications industry term for a broadband network that combines optical fiber and coaxial cable.

In a hybrid fiber-coaxial cable system, the television channels are sent from the cable system’s distribution facility, the headend, to local communities through optical fiber trunk lines. At the local community, a box called an optical node translates the signal from a light beam to electrical signal, and sends it over coaxial cable lines for distribution to subscriber residences. The fiberoptic trunk lines provide adequate bandwidth to allow future expansion and new bandwidth-intensive services.

ONU consists of active Optical Network Unit and passive Optical Network Unit.It has two functions: selective reception of the broadcast sent by OLT, and receiving response to OLT if the data is needed;The Ethernet data that the user needs to send is collected and cached, and the cached data is sent to the OLT side according to the assigned send window.

Switches, routers are almost all network devices used in modern local area networks. Among them, switches are responsible for connecting network devices (such as switches, routers, firewalls, wireless APs, etc.) and terminal devices (such as computers, servers, cameras, network printers, etc.) ); The router realizes the interconnection between the local area network and the local area network, and the interconnection between the local area network and the Internet; In general, the switch is responsible for connecting devices, the router is responsible for connecting to the network.

Switches：

The function of the switch is to connect terminal devices such as computers, servers, network printers, network cameras, IP phones, and realize the interconnection with other network devices such as switches, wireless access points, routers, network firewalls, etc., so as to build a local area network and realize all devices Communication between.

The switch is located in the second layer (data link layer) of the OSI reference model. The work of the switch relies on the identification of the MAC address (all network devices have a unique MAC address, which is usually directly burned into the network card by the manufacturer) ).

Routers：

Routers are also called gateways, which connect local area networks to form a larger wide area network. When connecting heterogeneous networks (heterogeneous networks refer to different network types, such as ATM networks, FDDI networks, Ethernet networks, etc.). Heterogeneous networks use different data encapsulation methods and cannot communicate directly, and routers can “translate” these different encapsulated data to achieve communication in heterogeneous networks. In addition, for the local area network, the wide area network is undoubtedly a heterogeneous network.

In general, the main differences between routers and switches are reflected in the following aspects:

(1) Different levels of work

The original switch worked at the data link layer of the OSI/RM open architecture, which is the second layer, and the router was designed to work at the network layer of the OSI model from the beginning. Since the switch works on the second layer of OSI (data link layer), its working principle is relatively simple, while the router works on the third layer of OSI (network layer), it can get more protocol information, and the router can make Smarter forwarding decisions.

(2) The data forwarding is based on different objects

The switch uses the physical address or MAC address to determine the destination address of the forwarded data. The router uses the ID numbers (ie IP addresses) of different networks to determine the address for data forwarding.

(3) Traditional switches can only divide conflict domains, not broadcast domains; routers can divide broadcast domains

The network segment connected by the switch still belongs to the same broadcast domain. Broadcast data packets will spread to all network segments connected to the switch, and in some cases will cause communication congestion and security vulnerabilities. Although the switches above the third layer have the VLAN function, they can also be divided into broadcast domains, but the sub-broadcast domains cannot communicate, and the communication between them still requires a router.

(4) The router provides firewall services

The router only forwards data packets with specific addresses, and does not transmit data packets that do not support routing protocols and network data packets whose purpose is unknown, which can prevent broadcast storms. Switches are usually used for LAN-WAN connections. Switches are classified as bridges, which are devices at the data link layer. Some switches can also achieve Layer 3 switching. In contrast, routers are more powerful than switches, but they are relatively slow and expensive. The three-layer switch combines the wire-speed packet forwarding capability of the switch and the good control function of the router, so it is widely used.

Summarize：

Whether it is a switch, a router , the realization of the functions of these network devices requires the network engineer to configure the device in advance (such as VLAN virtual network port division, firewall security policy configuration, router default gateway setting, etc.). At a different level, these network devices are computers with cpu and memory, and all implement hardware functions through the “translation” of the cpu to the machine language.

Switches are the common equipment for data forwarding in local area networks(LAN), and their performance and functions determine the manageability and data forwarding performance of the LAN. The following aspects should be considered when choosing a switch:

Number of ports

The number of physical ports supported by the switch determines the number of terminals or secondary devices connected to the switch, which need to be selected according to actual needs. Of course, subsequent network expansion needs to be considered. The access port of the switch is used to connect the internal network terminal, and the uplink port is used to connect to the upper-level equipment.

2.Port Speeds and Types

Switches come in Fast Ethernet and Gigabit Ethernet. Fast Ethernet allows up to 100 Mb/s of traffic per switch port while Gigabit Ethernet allows up to 1000 Mb/s of traffic per switch port. These ports may be a combination of SFP/SFP+ slots for fiber connectivity, but more commonly they are copper ports with RJ-45 connectors on the front, allowing for distances up to 100 meters. With Fiber SFP modules, you can go distances up to 40 kilometers. Currently, Gigabit Ethernet is the most popular interface speed though Fast Ethernet is still widely used, especially in price-sensitive environments.

3.Switch access capacity

The amount of equipment attached to the switch is mainly reflected in the depth of the MAC address table of the switch. At the same time, it is also necessary to pay attention to the number of host routing entries for the three-layer switch. For example, when selecting a Layer 3 switch, the number of all access terminals of the Layer 3 switch is required to be less than the number of host routing entries of the Layer 3 switch.

4.Network scale and switch network structure

Considering the scale and level of switch application networks, which are mainly divided into small and medium-sized networks and large and medium-sized networks, the recommendations are as below:

5.Functional support

Divide VLANs to realize that ports belonging to different VLANs can’t communicate with each other; Set static routes to realize that VLANs of different network segments can communicate with each other; DHCP snooping prevents the access of other DHCP servers from affecting the LAN. The above functions are commonly used in large and medium LANs.

6.Safety function

Specifically, such as: Access Control List, 802.1X authentication(Radius,Tacacs+), loopback detection, IGMP Snooping, etc.

7.Power requirements

At any layer, a modern switch may implement power over Ethernet (PoE), which avoids the need for attached devices, such as a VoIP phone or wireless access point, to have a separate power supply. Since switches can have redundant power circuits connected to uninterruptible power supplies, the connected device can continue operating even when regular office power fails. Another characteristic you consider when choosing a switch is PoE. This is the ability of the switch to deliver power to a device over the existing Ethernet cabling. To find the switch that is right for you, all you need to do is choose a switch according to your power needs. When connecting to desktops which do not require PoE switches, the non-PoE switches are a more cost-effective option.

Power over Ethernet (PoE) is a technology that allows network cables to carry electrical power along with data to devices such as IP cameras, wireless access points, and VoIP phones. With PoE, a single Ethernet cable can supply both power and data, eliminating the need for a separate power supply for each device.

PoE technology simplifies the deployment of network devices by providing both power and data over a single cable, making it a cost-effective and flexible solution for a variety of applications. The benefits of the PoE switch include reduced installation complexity, centralized power management, safety, and scalability, making it an attractive option for modern network infrastructure.

CMS is a one-stop cloud management platform launched by C-Data for small and medium-sized ISP. It provides comprehensive solutions such as centralized management, visual monitoring, intelligent operation and maintenance, and data analysis for network devices such as ONU, OLT, switches, and routers. CMS effectively reduces investment and maintenance costs, enhance management efficiency, and realize business value.

CMS is positioned as an operational management software system, addressing various pain points and challenges faced by small and medium-sized ISP. It not only manages devices but also gradually integrates and manages the entire network equipment, incorporating AI data analysis to assist ISP in network management.

CMS manages C-Data devices and integrates managements of third-party TR-069 compatible ONU and OLT. Additionally, it features an AI module for intelligent data analysis and recommendations, as well as authentication and billing modules designed to meet the needs of small and medium-sized ISP. It also provides a mobile app for user convenience.

The advantages of CMS include effective management of third-party ONU and OLT, AI data analysis, support for cloud deployment and user-friendly APP. In addition, CMS addresses the rapid response and flexible customization needs of small and medium-sized ISP.

We offer flexible deployment options.

1. On-premise. On-premise CMS ensures maximum security and can seamless integrate into your business.

2. SaaS. It minimizes service start-up time and simplifies maintenance and support.

3.Northbound interface. The northbound interface allows existing software to connect with CMS, facilitates OSS/BSS integration to create a unified solution for accelerated development and access to new services.

1. CMS supports coexistence mode, allowing existing software to connect via northbound interfaces for unified network management.

2. It can also operate in the replacement mode, managing third-party ONU and OLT in a centralized manner.

CMS integrates ACS functionality, enabling unified management of all terminal devices (ONU) through TR069.

1. Distributors can allocate CMS accounts and resources to ISP, improving and aligning work based on ISP capabilities and resources.

2. CMS offers an integrated deployment of sold ONUs. Distributors can have a comprehensive view of the network and customer activities, and get to make purchase plans and offer equipment recommendations based on the usage.

1. Develops new services and optimizes existing service plans with analytics.

2. Benchmark performance against industry standards and competitors.

CMS provides automatic warnings based on customer behavior to assist ISP in retaining customers.

CMS is positioned as an operational management software system, while EMS is a previous-generation network management software mainly focused on device management. CMS has a B/S architecture, supports cloud services, and offers extended functionalities such as third-party device management, AI data analysis, and authentication billing modules.

Contact our Sales Manager or Technical Support, we will provide you with a CMS account and the software.

CMS directly handle C-Data OLTs, ONUs, Routers, Switches, also supports for TR-069 compatible third-party ONUs and other devices. With CMS, you can easily manage up to 500,000 devices in one software.

1. When uninstalling the old version of CMS, please choose to keep user data.

2. The installation path needs to be kept on the same path as the previous version.

1. Please check whether the service port is occupied. If so, click the corresponding service tab to modify the port number.

2. Please export the log information and feed it back to C-Data Technical Support.

In the lower right corner of the CMS Panel, click the "Reset Password" button to reset the password.

1. Check whether the parameters reported by ONU Web are correct.

2. Check whether the number of bound ONUs has reached the upper limit of the license. If you need to increase it, you can contact C-Data sales staff.

3. The system firewall has enabled the option of intercepting all inbound connections in the public network settings, that is, all connection requests to the computer will be rejected.

We provide a comprehensive hardware + software solution. If you purchase a certain amount of hardware, CMS software is provided free of charge. Please contact sales staff to provide the best solution.

CPU: 4 cores,

Memory: 16G,

Remaining hard disk space: 64G.

Ensure that the network switch is activated in the CMS panel, and confirm that the PC can access Google Maps.

After iOS 17+ system version, apple will restrict access to servers deployed in the public network in HTTP mode. Therefore, when deploying a public domain name, if it is an HTTP protocol, you cannot log in to the CMS app normally.

To receive alarm notifications, the following conditions must be met at the same time:

1. Enable alarm notifications in the [Alarm-Notification Rules] interface on the CMS PC side;

2. The Android phone needs to have built-in Google services;

3. Enable app notification permissions in the phone system settings;

4. Under private deployment, the app access method must be cloud transfer. (SaaS deployment can be ignored)

Although Huawei Harmony OS versions 1.0 to 4.0 support the installation of Android apps, there may be performance issues since the phone's operating system is no longer Android-based. In particular, Harmony OS 5.0 no longer supports the installation of Android app.

The ONU list on the CMS app side currently displays ONUs of TR-069 and OMCI channels, while the PC side only displays TR-069 ONUs. OMCI ONUs can be viewed under specific OLTs.

The CMS WEB and the app have different positioning and functions, so not all functions on the CMS WEB will be implemented on the app, and vice versa.

1. Direct connection: The app accesses CMS services directly, such as when in the same LAN, through a VPN, or by using a public network IP. However, it cannot receive push notifications, such as alarms;

2. Cloud service: The app accesses CMS services through the external network and the transfer cloud server, and supports receiving push notifications such as alarms.

Possible reasons are as follows:

1. The app access switch is not turned on on the CMS PC side, please turn it on in the [System Settings-app Access] interface;

2. The current mobile phone has not passed the terminal authentication, please authenticate the current mobile terminal in the [System Settings-app Access] interface.