modem

A modem (modulator-demodulator) is a network hardware device that modulates one or more carrier wave signals to encode digital information for transmission and demodulates signals to decode the transmitted information. The goal is to produce a signal that can be transmitted easily and decoded to reproduce the original digital data. Modems can be used with any means of transmitting analog signals, from light emitting diodes to radio. A common type of modem is one that turns the digital data of a computer into modulated electrical signal for transmission over telephone lines and demodulated by another modem at the receiver side to recover the digital data.
Modems are generally classified by the amount of data they can send in a given unit of time, usually expressed in bits per second (symbol bit/s, sometimes abbreviated "bps"), or bytes per second (symbol B/s). Modems can also be classified by their symbol rate, measured in baud. The baud unit denotes symbols per second, or the number of times per second the modem sends a new signal. For example, the ITU V.21 standard used audio frequency shift keying with two possible frequencies, corresponding to two distinct symbols (or one bit per symbol), to carry 300 bits per second using 300 baud. By contrast, the original ITU V.22 standard, which could transmit and receive four distinct symbols (two bits per symbol), transmitted 1,200 bits by sending 600 symbols per second (600 baud) using phase shift keying.

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  1. zantarous

    Using WiFi router as a switch with ISP modem, getting intermittent network dropouts with ethernet

    I recently moved house and got a new ISP (Now Broadband) and have added my old Nighthawk into the mix as a switch upstairs with an additional WiFi SSID. I reset the Nighthawk to factory setting and turned of DHCP so it should now just be a dumb switch. I also set up a WiFi on it. I have done...
  2. saguk1234

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    I am currently using a Zyxel NR5103E and a unlimited data Three sim (£6 per month) for my home Internet. This is plugged into a Asus XT12 Pro mesh which is in Access Point mode. The Zyxel is doing the routing. I want to use a portable a battery powered 5g modem instead of the NR5103E and I...
  3. I

    V3 Hub in Modem Mode?

    Virgin has sent me a "Fibre Phone Adaptor" that will let me connect the analog "landline" phone to the V3 Hub. I look forward to trying it out, to insure it works as Virgin expects. However, I then want to switch the Hub to Modem mode, and connect it to a secondary router. That sounds simple...
  4. S

    ONT modem required?

    Is ONT modem required for Fibre broadband? How is it Community fibre does not use one? Does anyone know? Thanks
  5. bogart99

    Alexa after modem/router change

    Have had to change modem router which entails obviously messing about with Alexa. I have a Dot, an Echo Plus and an Echo Show. The Echo Show is like it was if I ask for a song off it goes with it using Spotify. Trying the Dot or Echo Plus I get the message " playing a specific song on this...
  6. S

    5g outdoor modem and wifi issues QUESTION help

    Hi peeps i am a bit of a novice here and new to this forum so please go gentle and sorry for the long post.. Also i cant see how to list this as a question instead of a discussion so if admin could change this id be greatful. So recently i jacked in my isp (vm) and chose to go for a home mobile...
  7. kanetankerous

    RUNNING ETHERNET CABLES QUESTION

    I have our cinema in a separate garage and want to move my office out there as well. I want to move my answering machine and have a landline handset out there. In the office in the house, the phone line comes into the modem/router via DSL input, then the phone/answering machine is plugged into...
  8. xarzu

    What is next for my network?

    I thought I would take a moment and share what I have experienced recently with my home network connection. I got a new Internet service provider since the local one I was using had too many dropped connections and my job depends on being online. But at least the modem was in the office and I...
  9. jessbuildstech

    TalkTalk + Asus RT-AX86U; Modem suggestions?

    Hello :) I have spent all evening trying to install my new Asus RT-AX86U router, using my current TalkTalk (Sagemcom) as a modem. Unfortunately, I have since learned this is not possible with the TalkTalk router, as no current TalkTalk router supports modem mode. I have included my current...
  10. H

    VPN + Sky + Router/modem - what's required?

    VPN + Sky + Router/modem - what's required? Hi all, first post here. Decided to join a forum after being left unsure by endless searching. Setup: Medium-sized 2 bed house FTTP Sky SR203 (mers) router (75Mbps) Smart TV (currently LG, but soon to change) 4K FireStick Macbook Air Company laptop...
  11. topgazza

    Modem only and mesh setup

    Difficult to pin down the cause but every three or four weeks I reboot my Sky Q Hub because it runs slow. At least that’s my perception. After a reboot it all runs fine I have WiFi disabled on the Sky Hub and use an Orbis mesh setup which is excellent. And have Sky FTTC Fibre. Is it worthwhile...
  12. U

    Longest Lasting Modem Recommendations

    Hello Everyone, About every two years my modem and router seem to start having issues. Is this normal, are there options out there that last longer? I currently have a Netgear modem and an Asus router. Cheers, Andrew
  13. mloc33

    Xfinity wifi 6 compatible modem

    I'm moving into a new house soon, we have xfinity, I'm looking at a mesh network setup (I'm new to this) specifically the TP Link Deco X20, (I like the price) but I don't want to use xfinities modem, I want my own. I'd like a budget friendly one, wifi 6, my wifi plan is around 1gb, so a modem...
  14. GranvillePlace

    Access Web interface for Modem in Bridge mode

    Hi to all, I'm curious if I can access the web interface for my Draytek modem 130 which is in bridge mode and connects directly to my Draytek 2925 as a WAN connection. Everything is working fine so I don't have a problem as such that I need to resolve other than curiosity! :) I utilise VLAN...
  15. S

    Modem only mode on openreach broadband

    I am currently on Virgin Media broadband only package 350mb that expires in August this year. I can see some really good fibre to the premises (open reach) deals from EE, Vodafone etc that touch giga download speeds. My only questions is that the VM hub very nicely turns into modem only mode...
  16. Jamie

    Old Huawei HG612 modem or use Plusnet Hub 2 in direct mode

    Previously I was on BT FTTC, I got sick of the Home Hub supplied by BT so bought a cheap BT Openreach branded Huawei modem and used an Asus RT-AC86U (and an older Asus router for AIMesh and to expand my network) The BT router didn't have a direct or modem mode hence the Huawei. This morning I...
  17. Advice with replacing a BT Openreach FTTC modem

    I'm looking for a bit of advice, I had FTTC installed many years ago and the BT engineer set up an Openreach modem as part of that. I understand these are now out of support, and it must be a good 7 years old now. I have that linked to a mesh router, with 2 other devices around the house. It...
  18. -Spike-

    VDSL modem router recommendations

    Hi all, I have an FTTC connection with Plusnet and use my own router / modem which is a Netgear D7800. This has started to become a little unreliable and whilst I would have preferred to first try a replacement it appears the D7800 has been discontinued. Does anyone have any recommendations for...
  19. A

    Making BT Home Hub 6 into a modem?

    My HH6 is playing up on the 2.4Ghz channel, now only giving 'dial up speeds' to any device connecting to it and a recent reboot hasnt helped matters. The HH6 is so limited on 2.4G range that it only has 3 channels and changing to one of the other 2 hasnt helped either. I dont reboot the HH...
  20. alextheg

    VPN Modem Router for Sky Broadband

    Hi. Im looking at buying a new modem router to work with Sky Broadband. Im on the Superfast package.. I know the new router would need to support DHCP 60 / 61. Ideally im looking for a router that supports VPN at the router itself rather than installing on connected devices. Any suggestions ?
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