Questions tagged [modem]
For questions about modems in relation to computer networks and network devices. Remember that only on topic modem network devices should be used. For instance, your company has an ADSL modem, that might be defect.
21
questions
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0answers
12 views
occasional loss of internet [on hold]
I have been trying to troubleshoot an issue with my home internet dropping occasionally over the past few months. I recently replaced both my router and my modem so I doubt there is hardware failure ...
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0answers
15 views
DSL internet connection [closed]
Sorry if this is the wrong spot or the question has been asked before, please redirect me then.
I recently moved from Romania to Germany and the internet connection here is via DSL, which I'm not ...
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2answers
37 views
Internet Entry Point
I am learning netwroking and would like to ask about how exactly we (as a casual user) get connected to internet and how a datacenter would do the same thing. i bet they dont use a regular modem which ...
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0answers
16 views
Multiple connections to a webinar and modem went down [closed]
I've kind of inherited the role of sysadmin at my company, even though I never went to school for something like that, and I really don't know what I am doing (haha). Long story short: yesterday ...
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1answer
28 views
CSU/DSU's and DSL modems
I read a few times that DSL modem isexample of CSU/DSU.
To my understanding CSU/DSU connect digital communication method to digital while DSL modulate digital communication to analog.
If so, how can ...
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0answers
12 views
CSU/DSU and Modems [duplicate]
So after a lot of research over the internet i couldn't get to a clear answer
To my understanding so far
modem is: piece of hardware which enables us convert digital signal to analog signal(and vice ...
1
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0answers
49 views
Simulating TCP/IP Illustrated Test Network [closed]
I just recently bought TCP/IP Illustrated volume 1 first edition for cheap and I see that they reference a test network throughout the book that looks like the following
Now I'm not the sharpest tool ...
2
votes
1answer
561 views
Can VPN on router connected to the modem bypass a double NAT created by two routers unbridged and connected to each other?
I can't seem to get my head around this scenario. If I am right, a VPN configured on the client-side/workstation would definitely bypass double NAT but on this scenario:
Modem <-bridged-> Router ...
1
vote
2answers
389 views
What is a “rotary dialer” in the context of dialup connections?
Some friends and I have discussed setting up a PPP dialup Internet gateway (solely for private use) for fun/nostalgia purposes. I've been reading through the Linux-PPP Howto at TLDP (old, I know, but ...
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2answers
47 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 ...
0
votes
1answer
511 views
Can all ports on nowadays switches act as uplink ports? [closed]
I basically know nothing about networks (I just learned what switch meant yesterday), and English is not my first language but I hope I can make my question clear.
So I just moved into a new house, ...
1
vote
1answer
81 views
Configuring Cisco ISR 1861 with External Cable Modem
I picked up an 1861 for cheap and I am trying to set it up for home lab. I have taken the Cisco courses for CCNP and I think if this was just a regular router or switch I would be OK, but I can't ...
2
votes
1answer
623 views
Intermittent periods of high packet loss, one hop beyond router
I've been trying to diagnose internet connection issues at a remote small business for which I am the system administrator. If this is not the proper Stack Exchange to post to, I'd really appreciate ...
0
votes
1answer
44 views
Modem configuration with many public ip [closed]
I need to configure a modem for my asdl connection. I have 4 public ip to manage:
1 for my modem
the others for servers that are on my LAN
The situation is this:
My problem is: which is the ...
2
votes
3answers
102 views
Does a dial-up modem support multiple users?
Since I have never worked with a dial-up modem, I was wondering if it created an internet connection for only one user, a point-to-point connection, or if it also supported multiple users.
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1answer
535 views
What could cause kvm virtualized pfsense to get 84mbps behind physical pfsense, but then drop to 1mbps when it replaces physical pfsense?
I'm scratching my head on what could cause the following behavior:
Scenario A: Laptop -> virtualizedpfsense -> switch -> physicalpfsense
-> modem
speedtest.com gives me 84mbps download (...
1
vote
1answer
173 views
Modem/device that can connect and route calls depending on type?
There are ways of allowing fax machines to share the same line as telephones and telephone answering devices. Back in the BBS days, a lot of people had dedicated phone lines for their BBS. A caller ...
1
vote
1answer
194 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 ...
1
vote
2answers
133 views
Specific web site traffic on 2 ISPs
There's a company (B2B interface) that provide certain services through a custom ISP (DSL), but this limits the internet connection only to this site, and on the office we have an regular ISP (DSL) ...
1
vote
2answers
86 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 ...
3
votes
3answers
247 views
Are modems needed to connect routers?
I apologize for the stupid question; I'm trying to wrap my head around the basics of networking. Also, please feel free to direct me to the right SE forum, if this is not the right place.
My question ...
