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Note: One of these was bought new this year.
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Note: One of these was bought new this year.

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I am trying to add two grandsream Hanytone 486 ATA's to my SIP network. Both of them worked at first, and them when I tried to make some configuration changes, they became nearly bricked. The red light flashes every second. When I plug in the WAN port the link light comes on as well as the activity light (shows activity). Plugging in the LAN port shows link but no activity. Plugging in a phone gets no dialtone and no power to the phone. Pressing the button on the Handytone does nothing.
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I am trying to add two grandsream Hanytone 486 ATA's to my SIP network. Both of them worked at first, and them when I tried to make some configuration changes, they became nearly bricked. The red light flashes every second. When I plug in the WAN port the link light comes on as well as the activity light (shows activity). Plugging in the LAN port shows link but no activity. Plugging in a phone gets no dialtone and no power to the phone. Pressing the button on the Handytone does nothing.

Grandstream Handytone 486's unresponsive. How to get in?

Networking hardware includes the physical devices facilitating the use of a computer network. Typically, networking hardware includes gateways, routers, network bridges, modems, wireless access points, networking cables, line drivers, switches, hubs, and repeaters. But it also includes hybrid network devices such as multilayer switches, protocol converters, bridge routers, proxy servers, firewalls, network address translators, multiplexers, network interface controllers, wireless network interface controllers, ISDN terminal adapters and other related hardware.

Networking Hardware-Other

Hardware includes cell phones and other digital living devices, tablets, computers, servers, peripherals and components, printers and scanners, gaming consoles, networking hardware such as routers, hubs, switches and modems, storage devices and security equipment such as firewalls and other appliances.

Hardware

IP telephony (Internet Protocol telephony) is a general term for the technologies that use the Internet Protocol's packet-switched connections to exchange voice, fax, and other forms of information that have traditionally been carried over the dedicated circuit-switched connections of the public switched telephone network (PSTN). Using the Internet, calls travel as packets of data on shared lines, avoiding the tolls of the PSTN. The challenge in IP telephony is to deliver the voice, fax, or video packets in a dependable flow to the user.