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Questions tagged [adsl]

For questions about the Asymmetric Digital Subscriber Line (ADSL) connection type. You should only use this tag in a professional enterprise purpose involving an ADSL connection.

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1answer
45 views

ISDN and DSL comparison

From Wikipedia: "Integrated Services Digital Network (ISDN) is a set of communication standards", and for DSL: "Digital subscriber line is a family of technologies". My question is: Is DSL built on ...
5
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1answer
84 views

Is it possible to set up a DSL lab environment?

I'm trying to figure out if I can setup a DSL lab for training purposes. If I have a switch or laptop running a PPPOE server, could I go from ethernet-to-modem then connect the modem's WAN port to ...
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1answer
52 views

Pros and Cons of two different ISP connection Model

I have seen two different models to connect My Server to cloud. Model 1: DNS ------| |---ISP_Router---Cloud----DSL Modem---Office_Router---Switch---My_Own_Web_Server Google ------| ...
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2answers
43 views

Is the `twisted-pair` line transfer `digital data` and `ADSL` line transfer the `modulated electrical signal`?

From the WiKi: 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 ...
3
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1answer
75 views

VDSL2 Cross Talk

I'm a system administrator for a large seasonal resort. There are approximately 150 summer cottages there. All are currently served by a mix of ADSL and VDSL2 over twisted pair telcom feeder cables. ...
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2answers
200 views

How to avoid cable crosstalk?

I have 4 ADSL UTP cables. How much distance do I need to leave between cables to avoid crosstalk?
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2answers
370 views

What are the reasons for ADSL to use ATM instead of Ethernet

I'm a newbie to networking and I wonder what are the reasons for ADSL to use ATM instead of Ethernet ?
6
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4answers
817 views

Why is the Ethernet Connection Symmetric?

I know that cable connection (DSL) is asymmetric, there is a certain bandwidth on the channel, and for a better user experience, they allocate a bigger portion to the downstream. I suppose Ethernet ...
1
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1answer
576 views

Best way to replace DSL cable by CAT6 cable

Best way to replace DSL cable by CAT6 cable, to decrease resistances and improve connection. Use 1 pair only. Connect every 2 pairs together. Connect White wires together and Colored wires together. ...
2
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2answers
633 views

What exactly is the local loop?

It would be crazy to have two transmission lines per every subscriber run from the subscriber to the ISP, do ISPs use a multiplexer then?On a cable network everyone is on the same line so multiplexing ...
4
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2answers
426 views

does the DSL distance really add more latency

I've been using dsl internet for quite a while and having a ping from Algeria to France of about 90 ms , after trying to ping some locations in Algeria , i am getting about 50 ms, ping to my gateway ...
2
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1answer
2k views

Different SNR Margins for Downstream and Upstream

I'm currently using an ADSL connection. The SNR-Margin for the Downstream is usually around 6db for a Line-Attenuation of 54db. It's terrible and causes a lot of CRC errors. While, at the same time, ...
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1answer
109 views

Establishing ip network over intercom

I am in an intercom network with 2 telephones at 2 different places A and B. If I pick up receiver at A and dial a certain number, the phone rings at B and I can speak. I have ethernet based ...
4
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2answers
28k views

What is SNR Margin and Line Attenuation?

I'm currently using an adsl connection and last week an engineer from my ISP came and told me that my SNR margin and line attenuation is not good, and they need to replace the main telephone cable to ...
1
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1answer
183 views

Can a VDSL2 to Ethernet converter be used as a replacement for a bridging VDSL2 modem?

I've got my own network infrastructure already, but I'm tied to my ISPs modem which is a bit on the flaky side. The modem is in bridging mode, with the perimeter router behind it handling ...
0
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1answer
55 views

Would a pulse dial telephone affect ADSL reliability/speeds? [closed]

I have set up ADSL in a Spanish property that has a single pulse dial telephone. A DSL splitter has been used, and both the telephone and ADSL work. ADSL speed in this area is poor anyway, so its ...
0
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1answer
223 views

Why does a Spanish internet modem/router not require a DSL filter? [closed]

TL;DR - Why does an internet router in Spain not require a DSL filter? I am trying to set up an ADSL router in Spain. After some trial and error (RTFM) I see that Spanish routers do not require a ...
2
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1answer
682 views

What's the meaning of “Tx Power” in DSL test?

I've reciently tested ADSL network. Alongside parameters that I'm familiar with their meaning (SNR marin, Line Attenuation etc.) I come across Tx Power. I tried to google it, but there was no clear ...
4
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1answer
433 views

What's the difference of TR-069 and Point-To-Point protocol?

I've read my ISP, Telecom uses a Point-to-Point regarding the ADSL networking over ATM nowadays (which is rarely used in my country, and it's non-commercial). My friend told me it actually uses TR-069,...
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2answers
85 views

Why Business Class router don't usually include ADSL?

I am shopping for a good VPN router to replace my terrible stock ADSL modem + router from my ISP, which need to be restarted 4 times a day. This is for my office use, which connected by around 17 ...
1
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2answers
277 views

ADSL connection with routed subnet

My ADSL provider is providing me with a routed subnet over ADSL. I have two IP address ranges: the PPP range (to estabilish the PPP connection between the modem and the ISP) and what they call the ...
0
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2answers
133 views

Can squeezing an RJ11 cable affect network performance? [closed]

I have just bought one of these: Ultra High Speed ADSL Cable 5m to move my router from the hall into my living room. Before and after I installed it I did a batch of speed tests. I was getting 75-80 ...
3
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5answers
603 views

Which kind of connection do i need for BGP peering?

If i would like to do a BGP peering with someone do i need to have a direct connection to him? Meaning that we are in the same segment? If not, would i be able to do a peering with someone even if i ...
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3answers
1k views

How to make IPSec VPN tunnel to work from behind NAT on ADSL?

I want to establish a VPN tunnel with AWS using IPSec (Vyatta). There is something that I was not able to figure out: How do I make it work without having to configure a static IP for the customer ...
3
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1answer
1k views

PPPoE interface doesn't use ARP

LAN border routers often use PPPoE protocol to communicate with ISPs and to access the Internet through ADSL. This link provides an example of output of ifconfig about an interface using PPPoE (page ...
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2answers
2k views

Why are /30 subnet used for PPP connections?

Our telephone company has recently set us up a new ADSL connection. It consists of a PPP link over ATM. The connection comes with a public /30 subnet that we can use to our liking. We used one of the ...
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3answers
7k views

Why use PPPoE and not use IP directly?

As far as I understand, PPPoE operates over ethernet, so for PPPoE to be usable you should already be able to send Ethernet frames to your ISP. At that point, why use PPPoE at all? Why not just run ...
1
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1answer
96 views

How does DSL synchonization actually work?

I would like to know, how the synchonization of ADSL (Asymmetric Digital Subscriber Line) actually works, something a bridging DSL modem does, for example. I could only find out very general things ...
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2answers
1k views

In Fiber Optic Telephone line, how light signals are converted to the voice signals? [closed]

I have been learning how internet data travels in different kind of Broadband access. In case of telephone broadband, voice signals travels through the telephone line. At the user premise, the modem ...
2
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3answers
4k views

NAT Network setup with DSL modem and Mikrotik router [closed]

I have littel experience in this kind of setups, so please bear with me. I think the question is kind of basic. I have to install a router in a LAN since I'll have to have it mandle a VPN tonnel ...
0
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1answer
682 views

TD-W8951ND: Can I use this modem as router only? [closed]

I am having a modem / router TD-W8951ND which works fine with ADSL cable (telephone cable). Since I am changing my broadband plan (they will be providing there own modem), I need to make wifi work ...
0
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1answer
43 views

what command line linux show computers that is connected to a modem? [closed]

Suppose that I connected to internet -- from ADSL modem or wireless -- is a command line for linux for PC not server or cisco switch that I can detect my partner (we have a modem 4 port LAN example) ...
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1answer
27 views

Bond ADSL+ line with Cable Modem line in one single router

I need two bond ADSL+ modem with cable modem router at the office so I don't have to switch the line everytime one of them is offline, is there any software/hardware that allows me to bond two ...
1
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1answer
48 views

DSL upload link breaks down. Where to look and not to look?

In a small office where I set up the network, we recently started to experience WAN problems on the (V)DSL line. Specifically, up to three times per day the upload link breaks down to almost zero ...
2
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3answers
3k views

Does Internet speed over cable depend on distance?

Perhaps the question I want to ask is not directly related to discussion subjects over here, but I couldn't find better place to ask. I wanna know how does internet connection speed depend on ...
1
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1answer
51 views

Testing PPPoA using WICs

We've started deploying cisco routers in pairs (867VAE-K9 in particular) to offer office sites failover using ip sla and HSRP. In testing I've been using 1841s and running the dialer over ethernet ...
0
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3answers
656 views

How to connect two different technologies in one LTE and DSL [closed]

In place where I'm living now, I have a poor internet connection. My download speed is not bad, but upload is poor. I have two broadband providers. First is DSL, or isdn I'm not sure, but I know one ...
8
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3answers
137 views

Why many of our WANs use fixed bandwith division between up- and downstream?

To multiplex upstream and downstream traffic typically frequency multiplexing or time multiplexing is used. E.g. an ADSL connection may use FDM and use 25kHz to 138kHz for upstream and 138kHz to ...
0
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1answer
57 views

Link ADSL modem together [closed]

Is it possible to connect two (not more) ADSL modem together by using RJ11 in a local environment (ie: in a lab) ? +-------+ RJ45 +--------------+ RJ-11 +--------------+ RJ45 +-------+ | LAN 1 |...
2
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3answers
10k views

What causes packet loss when using full bandwidth from ISP?

We have a small, local ISP that is having some networking issues and I'm trying to understand the cause to better communicate with their network guys. I work with a number of companies with different ...
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2answers
2k views

How to configure WAN backup with 2 ADSL boxes and 1 router?

I've got 2 IP over ADSL boxes (Orange & OVH) and 1 TP-LINK router to manage the possible failover of one link. When the Ethernet link between the primary box falls or when the bow itself is down, ...
2
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6answers
1k views

Leased lines vs. bonded DSL

first of all this is my first post on this forum however I got quite a lot of very helpful information from here in the past. My company is operating in travel business and the at the moment we ...
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2answers
179 views

Simple question: Cisco 1750 AUX Port as “ADSL WIC”

I'm going to buy a Cisco 1750, but its lack the ADSL WIC Module. My question is, can I use the AUX Port to plug my RJ11 for DSL PPPoE Authentication? Like this: Cisco 1750 ISP --- AUX -----...
4
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1answer
2k views

Cisco 877 ADSL Configuration

I'm a unix systems engineer and my network background is not so strong; I need a help to do the last touch-up to a cisco 877. I've substituted our adsl router (a simple home router provided by the ...
1
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1answer
120 views

Will a network congestion occur if I use a single ADSL router connected to 24 port switch

I'm wondering how ADSL networks are implemented in an enterprise. I have about 20 computers in my network which will be accessing the ADSL internet connection. This is how my network will be : ...
4
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1answer
970 views

Will an ERICSSON T720G GPON ONU & a Linux box work as an upstream PPPoE BRAS in our demo setup?

I am a volunteer teacher trying to get my students fired up by learning Broadband. Accordingly I am building a small scale DSL/PPPoE Broadband network that they can touch, deconstruct and put back ...
8
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1answer
608 views

Is ADSL's UDP packet forwarding rate strictly linear to packet size?

Suppose an ADSL2 Annex A device had a upload speed of 300kbps; tested using a TCP connection. Now suppose I want to send 8-byte UDP keep-alive packets at the maximum possible rate*. Would the ...
2
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2answers
7k views

Causes of low SNR

I am using a ADSL 2+ broadband service. My router shows very low SNR margin. While I quite understand what is SNR, I was curious to know what causes low SNR practically.
9
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1answer
4k views

PPPoA ADSL Configuration with external modem on Cisco 891

Context We use Cisco 891 routers as CPE for several client sites. They are all running IOS 15. Cisco IOS Software, C890 Software (C890-UNIVERSALK9-M), Version 15.0(1)M8, RELEASE SOFTWARE (fc1) The ...