Reddit Reddit reviews TRENDnet USB to Serial 9-Pin Converter Cable, TU-S9, Connect a RS-232 Serial Device to a USB 2.0 Port, Supports Windows & Mac, Supports USB 1.1, USB 2.0, USB 3.0, 25 Inch Cable Length, Plug & Play

We found 45 Reddit comments about TRENDnet USB to Serial 9-Pin Converter Cable, TU-S9, Connect a RS-232 Serial Device to a USB 2.0 Port, Supports Windows & Mac, Supports USB 1.1, USB 2.0, USB 3.0, 25 Inch Cable Length, Plug & Play. Here are the top ones, ranked by their Reddit score.

Computer Accessories & Peripherals
Computer Cables & Interconnects
Serial Cables
Electronics
Computers & Accessories
TRENDnet USB to Serial 9-Pin Converter Cable, TU-S9, Connect a RS-232 Serial Device to a USB 2.0 Port, Supports Windows & Mac, Supports USB 1.1, USB 2.0, USB 3.0, 25 Inch Cable Length, Plug & Play
USB: The USB to serial adapter supports USB 1.1 and it is compatible with USB 2.0 and USB 3.0 ports.RS-232 SERIAL CONNECTOR: Connect RS-232 serial devices, such as modems or printers, using the widely supported USB standard found in most laptops and desktops today.SUPPORTED OPERATING SYSTEMS: The USB to serial converter adapter is compatible with Windows and Mac operating systems. Windows 10, 8.1, 8, 7. Mac OS 10.11, 10.10, 10.9, 10.8, 10.7, 10.6FLEXIBLE CABLE: Integrated and flexible 540mm (21 in.) USB 2.0 cable accommodates most installation scenarios. Total cable length of 25 inches when including the RS-232 (9pin) and USB Type A.EASY SETUP: Simple installation in seconds of the USB to Serial 9-Pin Converter Cable. Insert the your computer
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45 Reddit comments about TRENDnet USB to Serial 9-Pin Converter Cable, TU-S9, Connect a RS-232 Serial Device to a USB 2.0 Port, Supports Windows & Mac, Supports USB 1.1, USB 2.0, USB 3.0, 25 Inch Cable Length, Plug & Play:

u/uid_0 · 17 pointsr/FuckImOld

I feel your pain. Get one of these.

u/VA_Network_Nerd · 10 pointsr/Cisco

A USB to RJ45 cable will probably work fine.

I've never used one, and I don't see any such cables with long histories of positive reviews & glowing feedback.

But I have used USB to DB9 serial adapters, combined with traditional DB9 to RJ45 Cisco Console Cables for years, with excellent result.

USB to DB9
DB9 to RJ45 Console Cable

u/Joker_Da_Man · 3 pointsr/networking

For example this one auto-installed and hasn't given me any trouble.

u/PrintStar · 3 pointsr/retrobattlestations

I have a DEC Rainbow connected to my RPI using serial. It's not particularly hard. I suggest buying a USB-to-RS232 adapter. Mine is a TRENDnet that seems to work fine on all Linux machines I've plugged it into.

I also have a serial adapter on my GPIO pins using a MAX3232 chip. This solution, however, stinks. The RPI only provides TX/RX on the GPIO pins. There are no other pins, making hardware flow control impossible. There are no DTS, DCD, RTS, CTS, etc. signals available. These lacking features really confuse some of the Rainbow's comm software. On top of that, operating above 9600bps without these flow control mechanisms, even though Xon/Xoff flow control is enabled, regularly leads to a corrupted data stream. That's why I would strongly suggest using the USB-to-RS232 adapter instead of the RPI's GPIO pins.

u/discordant · 3 pointsr/osx

You need a USB to serial adapter, like https://www.amazon.com/TRENDnet-Converter-Prolific-Chipset-TU-S9/dp/B0007T27H8/ref=sr_1_3?ie=UTF8&qid=1499385175 or https://www.amazon.com/Console-Essential-Accesory-Ubiquity-Switches/dp/B01AFNBC3K/ref=sr_1_8?ie=UTF8&qid=1499385175&sr=8-8&keywords=usb+to+serial+adapter . Anything with Prolific will work, or SiLabs (also seen in Cygnal stuff). Both have OSX drivers. I think the Prolific drivers may be built in these days.

Anyway - Install the drivers and then you can use screen or other tools to attach to the tty, e.g. screen /dev/tty.<something> 115200. All the USB to serial stuff will generally present as a TTY device in /dev.

u/rshorning · 3 pointsr/Starlink

> And I’d like to learn about satellites and especially space internet connection

What I'd recommend doing is simply dig into learning about general serial data transmission protocols and about the OSI network model. If you can learn about the gritty details of TCP/IP and how to make your own digital data packets, it would go a long way to really understand how to use this technology.

If you want to experiment, there are several wireless serial data transceivers that you can use for some custom packet experiments at relatively low cost. Basically, you open a raw serial data port and then send your data through the wireless links. Note that I'm not recommending this particular supplier, just using it as an example of the kind of products you can access to play with this technology if you really want to get some direct "hands on" experience.

Mind you, working with raw RS-232 serial data is really in this case mostly for experimenting and learning about how to get it done rather than trying to make a ground breaking application and really pushing the technology where you might want to get into USB specs and other digital transmission protocols. If you learn at this level though, you can write your own ticket when it comes to getting employers noticing you.

If you have newer computers without a raw DB-9 RS-232 serial data connector, you can also buy some comparatively inexpensive USB converters and experiment with building your own network between several computers using just raw data connections and building a network from the hardware on up.

If you really master all of this and can get TCP/IP packets flowing through these connections, you will be set to be hacking the Starlink ground station as soon as it comes out for people outside of SpaceX. By hacking, I mean somebody who is really using the full power of the network and making applications beyond the casual default software that would be standard.

I really hope that SpaceX will permit us to get into that lower network level of packet operations without having to go into black hat hacking. It would make developing personal cubesats and other really fun satellite operations possible.

u/cdawwgg43 · 3 pointsr/homelab

This router is a bit of a curious case. It's designed for using 3G and LTE connections. The first thing you should do is get a usb serial and plug into the console port. Download MobaXTerm, it blows putty out of the water. Check your device manager and see what COM pot your adapter is on. Go back to MOBA and select sessions --> new session --> Serial. Sometimes it shows up as prolific. Wait for the router to boot. If you see a "Would you like to enter the initial configuration dialog y/n hit N. Type en and type sh ver. This will show the version of IOS. If it boots into rommon you're screwed as IOSes for this router aren't readily available. I'd HIGHLY suggest checking out Cisco's whitepapers on how this unit functions. The basics are still there, wan/lan. Try using it to set up your house to connect to the internet. Read about the overload command which is how NAT is done. This is also a great way to start getting familiar with the CLI.

u/mobilesnow · 3 pointsr/BurningMan

Here's an updated guide that's more user-friendly than what I've written in the past. This is a slightly involved process, and I spend about an hour before leaving for BRC configuring the GPS, and 2 hours after the burn downloading the tracks and stitching everything together in Photoshop. This is my 4th year doing this.


Note: I've only been able to do this via Windows. There may be ways via Mac or Linux, but I've not been able to figure them out yet.


Step 1: get a GPS unit that can autolog your tracks. I use a Garmin eTrex Legend. Find it used online for less than $50. It's very durable due to rubber gaskets on all buttons which prevents dust issues. Long-life with 2xAA removable batteries last 2 days on average. Mine has lasted 4 burns with zero issues.


Step 2: turn on "Track Log: Auto" if using the Garmin eTrex Legend, and start walking/biking/flying around BRC! This is turned on by default on my unit, so do is a factory reset of your GPS if it's the eTrex Legend. When this GPS is on, it's tracking movement.


Step 3: after the burn, download your tracks to your PC. You need 2 cables (Garmin to serial port - Amazon, and Serial port to USB adapter - Amazon), and software from Garmin (MapSource - free from Garmin). The port on the GPS for the cable is on the top-rear under a rubber flap. Plug in the cables to your PC, turn on the GPS, and open MapSource. Click on "Transfer" in the menu, and download all tracks from the GPS. The tracks look like this - imgur in MapSource. To change the color of your tracks, on the left hand side double click on any track, and select the color you want it to be. I pick one color per day, and set it for all tracks on that day.


Step 4: screen shot and stitch the maps together in Photoshop. Start by zooming in on your tracks in MapSource. Take a screenshot, scroll a bit, take another screenshot, and repeat this process until you have 10-15 screenshots of portions of the map, like this example - imgur . Next, open all the screenshots in Photoshop and stitch them together. Next, open up google maps in a web browser and search for "Black Rock City". Zoom in, and take 10-15 screenshots of the entire city like this second example - imgur, stitching them together in Photoshop. Now you have a high-res version of your tracks, and a street map for BRC from Google Maps. Next, select just your tracks without the gray background by going to the menu "Select > Color Range" on your tracks image. Click on the gray area of the map thumbnail, set the fuzziness to 32, and hit "Ok". Then go into the menu "Select > Inverse" to select just your tracks. Copy this (Edit > Copy), go to your stitched together image from Google Maps, and paste your tracks over it (Edit > Paste). Then, using the Edit > Transform > Scale tool, resize the tracks until they fit exactly with the Google Maps image.


(optional recommended step): Before leaving for the playa, load your Garmin with the GPS map for BRC that comes out a week before the event from http://www.wkeller.net/BRC-GPS/ . William Keller does a fantastic job of putting these maps together, and it makes the GPS unit useful on playa, particularly during dust storms. It has waypoints for all potties, health services locations, roads, etc. Load this into the Garmin eTrex Legend using Sendmap. To do this, first plug in your GPS, then open MapSource to determine which Com Port your GPS is connected to when plugged into your PC. Open SendMap and select the Com Port you saw in MapSource and set the speed to 9600, and the rest is easy to follow using Mr Keller's instructions from http://www.wkeller.net/BRC-GPS/

u/Steeps5 · 2 pointsr/pcmasterrace

Bam! $10 Serial to USB:
http://amzn.com/B0007T27H8

$16 External DVD/CD Drive:
http://amzn.com/B00Y82T6SI

Now you can use any laptop you want! (as long as it has USB ports)

u/schraepf · 2 pointsr/sysadmin

I recently had great success managing a Cisco PIX firewall with this USB to Serial adapter from Trendnet. I used it from a Windows 8.1 VM and Bootcamp.

u/Atreen · 2 pointsr/networking

Yes I know, but for some reason I didn't think to screen shot as I was already taking pictures of the setup. As for the terminal stuff, I just use TotalTerminal so I can go in and out of it quickly. Then for the serial stuff I just use This combined with a script I made so I don't have to remember all the screen stuff and with the correct drivers, it works like a charm.

edit: Clarification

u/cr0ft · 2 pointsr/AskTechnology

In reality, you don't need most of it anymore. Serial port? Small USB-to-serial adapter, job done. Optical drive? Basically never need one, when you combine stuff like server iDRAC and IPMI with remote management, and OS installs can be done off USB sticks.

The one thing I do wish my Surface Pro had is an Ethernet port, but I've managed to work around that also (usb3 to gigabit adapter).

Battery life? Well, a HP Spectre X360 15 inch - what may well be the best laptop of 2016 in my book - will have all-day battery life, and 4 USB ports (one USB-C, 3 A), plus HDMI and DisplayPort.

Arguably, a 15 inch slim ultrabook like that and a serial port adapter and USB3 bluray will still be less to haul than some ugly old brick. And if you find yourself standing in a data center needing to operate it one handed, it flips into tablet mode with a touch screen.

https://www.amazon.com/VicTsing%C2%AE-playback-Blu-ray-External-desktops/dp/B014OSZF4Y

https://www.amazon.com/TRENDnet-Converter-Prolific-Chipset-TU-S9/dp/B0007T27H8

https://www.amazon.com/Cable-Matters-SuperSpeed-Gigabit-Ethernet/dp/B00BBD7NFU - or better yet this, if you want more USB3 ports also: https://www.amazon.com/Cable-Matters-SuperSpeed-Gigabit-Ethernet/dp/B01J6583NK

But, in answer to your actual question, no, I'm not aware of an old school brick with tons of ports that's worth buying. A few accessories you can keep in the bag until you need them makes more sense anyway - in my opinion.

Well, unless you go to rugged or semi-rugged designs. They have to be so bulky anyway that they toss in a ton of ports.

http://en.getac.com/notebooks/S410/features.html perhaps or machines of that style.

Dell also makes semi-rugged. Panasonic Toughbook etc. But all these rugged models cost a premium. Then again, if you get stuck in a snowdrift, you can use them as shovels, so... :)

Or else, you can go all out! :) http://en.getac.com/notebooks/X500-Server/features.html

u/My_Police_Box · 2 pointsr/techsupport

For about $10 you can get this.

u/FunDeckHermit · 2 pointsr/AskElectronics

From an amazon review of de cable:

>This cable appears to be a USB-to-Serial adapter similar to http://www.amazon.com/TRENDnet-USB-RS-232-Serial-Converter/dp/B0007T27H8 , only instead of coming out at a 9-pin RS232 connector, it comes out at proprietary 3-pin connector.

Follow /u/nonewjobs s advice.

u/1215drew · 2 pointsr/networking

First off, unless I'm mistaken, /r/homenetworking would be the right place for this thread.

The 1242 is not a router, it is a Wireless Access Point.

You need a Cisco Console Cable and a (USB-RS232 Adapter)[https://www.amazon.com/TRENDnet-Converter-Prolific-Chipset-TU-S9/dp/B0007T27H8/ref=sr_1_3?s=pc&ie=UTF8&qid=1486739466&sr=1-3&keywords=serial+to+usb] for your laptop.

Some basic google searching can lead you to various simple guides on Cisco's website for your intended use case.

u/InductorMan · 2 pointsr/AskElectronics

No, RS232 and USB are completely different. RS232 transcievers can be connected to a computer using USB, but the USB protocol is its own thing.

The Arduino actually has a serial port in that other Atmel chip mounted near that USB connector. The other Atmel chip is a USB enpoint that presents itsself to the computer as a USB-connected serial port. This is then used to talk to the actual Arduino micro that you're programming when you upload your program, and is used when you're running the Serial library on the Arduino.

Referring to this schematic, the Atmel USB-connected micro that acts as a serial port is U3, and the actual Ardino-programmed micro is ZU4.

The serial port is carried across RN4A and RN4B, right at the bottom of the schematic. You can talk to the Arduino by grabbing hold of the serial port at the pins labeled 0 and 1 of the IOL connector.

Now, to be clear: this is a serial port but it is not RS232. This is what's called a TTL-level or Logic-level serial port. There are USB-connected serial ports that you can buy for either of those things. Here's a tutorial on the difference.

So you can buy a logic-level serial port like this one and plug it right into the pins (the TX and RX pin on the port I mentioned above, and the ground pin) and after you get the Baud rate correct, you should be able to use this to communicate with the Arduino instead of the normal on-board USB connected serial port.

Then you should be able to extend the wires. However, this TTL level serial signal is not as robust as the RS-232 carried serial signal.

To use the real RS-232 serial signal, you'd need to buy an RS-232 type USB-connected serial port (if your computer doesn't have one already, this is the protocol that's almost always carried on a 9-pin D-style connector). Then you'd need a transciever for the Arduino. This tranceiver shield looks easy to use. This would work with a USB serial adapter such as this one.

So either one of those, if operated at a low bit rate such as 9600 baud or even slower, should go over quite a long cable. I feel like the RS-232 serial adapter may go over a longer haul, but honestly it's quite possible that the TTL adapter would be just as good. And that way you don't have to put a shield on the Arduino, which is nice.

FYI if you chose to use the RS-232 signalling scheme, you only need three of those nine wires: TX, RX, and ground. You don't actually need to use the DB-9 connector and the 9-wire cable to get it to work. All the other stuff isn't actually used on the bare-bones serial link that we want to set up here.

u/DarraignTheSane · 2 pointsr/techsupportgore

>instead of using a straight-up converter for that (which I'm sure exist)

https://www.amazon.com/dp/B0007T27H8

u/ZPrimed · 2 pointsr/networking

I use one of these for USB to DB9, then I can attach whatever cable I need.

Works on both macOS and Windows too

u/strangerwithadvice · 1 pointr/stratux

Here's an old image that I gave to someone to test:
https://www.dropbox.com/s/owvhmhxt3w6c31n/stratux-serialout_test.img.zip?dl=0

Tested with this: http://amzn.com/B0007T27H8

On a Chelton EFIS.

If you end up trying it, please post the hardware you used and how it worked. It should work just as a normal stratux does on the Wi-Fi network, but send the data over serial at the same time.

u/unawino · 1 pointr/roasting

Do you already have the center serial cable? If so, then you can pick up a cheap usb/serial converter cable.

u/Desmocratic · 1 pointr/techsupport

I'll add this item, you will need to talk to your switches: USB to Serial

u/Killercds · 1 pointr/homelab

This is the cable I used when setting it up. I just stuck a female-female null modem adapter on the end (had to remove the screws for it to fit)

For interfacing, I used a paid app on my Macbook. It's just called "Serial", it's got some nice features and UI.

u/Wheaties466 · 1 pointr/ccna

I've test with 2 USB to serial adapters This and This. OP of the article uses This 4 to 1 cable but I personally thought it was a bit expensive.

I have the rasp pi 2. It should work with all versions though.

I haven't tested with a usb hub just yet. But I can and will. I don't see why you would need a powered one though.


wifi adapter

u/STLgeek · 1 pointr/homeautomation

If you are familiar with linux, I'd recommend heyu. I've been using it and X10 for about the last 15 years or so, and it works great. I think at the beginning, I was using some other software, but I don't recall what it was.

Someone mentioned "phases" and yes, this can be a problem. However, the bigger problem for me at least is CFLs. They introduce so much noise on the line, that the X10 signals get lost in said noise. I use only incandescent and dimmable LEDs and it works great.

If you do need another serial port, just make sure you get one with RTS pin exposed, like this:

http://www.amazon.com/gp/product/B0007T27H8

u/Luigi311 · 1 pointr/homelabsales

I was looking around and someone posted this cable along with this adapter and looking at the questions one was a nortel engineer that recommended it and said it works with their products. Ill give it a go when it all arrives. What program did you use to connect to the switch via console? Telnet? Screen? Putty? Thanks for the info about the gateway i wouldnt have known. Looks like im going to have to do a good amount of research when setting it up since i dont know much.

u/OgdruJahad · 1 pointr/techsupport

Digital Organizers, now that's nostalgia. So you can get a USB to Serial Dongle, but that might just be half the problem, the software to actually read the data might be outdated.

I think the easiest way is to add the contacts manually to the phone and then delete them from the Sharp device. Now you didn't mention the phone so I have no idea how we can help you with that.

Also its possible that while you have 30 years of contacts, maybe not all of them are relevant for one reason or another, so think of this as a digital spring cleaning and only add the contacts you actually need to your phone.

u/drakontas · 1 pointr/networking

Cheapest option I can find at the moment: Have it by Wednesday for $4 with free Amazon Prime shipping -- http://www.amazon.com/Generic-7-Cisco-Console-RJ45-to-DB9/dp/B000GL3MOY/

And a cheap USB-to-DB9 adapter: http://www.amazon.com/TRENDnet-USB-RS-232-Serial-Converter/dp/B0007T27H8/

u/PancakeEater101 · 1 pointr/sysadmin

I have a D-Link DGS-3024 switch, and it has a female console port, do I just need a regular serial to USB cable?

http://www.amazon.com/TRENDnet-RS-232-Serial-Converter-TU-S9/dp/B0007T27H8/ref=sr_1_14?ie=UTF8&qid=1380836922&sr=8-14&keywords=male+console+cable

u/djunos · 1 pointr/astrophotography

This worked for me on an Orion Sirius/HEQ5:

RS232 male to USB: https://www.amazon.com/TRENDnet-Converter-Prolific-Chipset-TU-S9/dp/B0007T27H8/

This cable goes from synscan controller to the RS232 male: https://www.amazon.com/Celestron-Nexstar-232-Interface-Cable/dp/B0000665UZ

So you plug the trendnet RS232 male to USB into your laptop or PC, install the driver, plug the Celestron RS232 cable RJ11 bit into your synscan controller, then connect the trendnet RS232 male to the Celestron RS232 female. Viola! For me, the RJ11 bit was incredulously easy to become dislodged from the controller even if the RJ11 was clipped in properly. Even if you pulled the cable out just a centimeter, the connection between the mount and PC would be dropped. I solved it by shoving the RJ11 in as far as I could then taping it in place. Of course, YMMV, but I was on the brink of just getting an eqdirect cable until I figured it out.

Hope it helps!

u/kWV0XhdO · 1 pointr/networking

> guess would be that this is, in fact, a host port on the router. Both cables are active and the two sides ... are both peripherals

Interesting. You're speculating that the Cisco USB-USB cable is, in fact, the unholy marriage of a pair of these and one of these.

That's a strong theory, I like it. Well, like might be too strong of a word, but at least it tempers my horror a bit :)

> couldn't find the damn thing. Extended the outage

This. It's just stupid/awful.

u/thephotoman · 1 pointr/amateurradio

Because that's totally a problem that can't be fixed for $10.36 for same day delivery.

Of course, I need this stuff for work, as my job occasionally has me working with legacy factory equipment.

u/drmonix · 1 pointr/MechanicalKeyboards
u/Paddys · 1 pointr/electronics

USB and old-school serial are completely different. You can get a USB-serial adapter for very cheap online though. A lot cheaper than $25.

edit: for example: http://www.amazon.com/TRENDnet-USB-RS-232-Serial-Converter/dp/B0007T27H8/ref=sr_1_1?ie=UTF8&qid=1421088980&sr=8-1&keywords=usb+serial

u/lancemsnyder · 1 pointr/Cisco

You cannot connect to it directly from your network interface card. What you need is a roll-over console cable and a usb-to-serial adapter.

http://www.amazon.com/Generic-HKUS-FB000GL3MOYT-T000650F-Cisco-Console-RJ45-to-DB9/dp/B000GL3MOY

http://www.amazon.com/TRENDnet-RS-232-Serial-Converter-TU-S9/dp/B0007T27H8/ref=sr_1_1?s=electronics&ie=UTF8&qid=1415759891&sr=1-1&keywords=usb+to+serial

USB to your computer, connect the serial ends and plug the RJ45 into the console port of the switch.

Once you have done that, you'll need to select SERIAL connection from putty, you can find what COM port your usb-to-serial device is on by going to devices and printers in windows. Change the COM port in putty to match, and make sure the connection settings are:

Bits per sec : 9600
Data bits : 8
Parity : none
Stop bits : 1
Flow control : none

click connect and press a key if you see no output on the screen.

u/enginoir · 1 pointr/AskElectronics

No it doesn't charge. According to one of the comments in the Amazon reviews:

> This cable appears to be a USB-to-Serial adapter similar to http://www.amazon.com/TRENDnet-USB-RS-232-Serial-Converter/dp/B0007T27H8 , only instead of coming out at a 9-pin RS232 connector, it comes out at proprietary 3-pin connector.
>
>With that in mind, it's important to note that the cable all by itself, before ever attaching a dive computer, requires drivers. With drivers installed, this cable (again, before ever attaching the dive computer) shows up in Windows as a new COM device (COM7 specifically on my laptop, but yours might enumerate differently).
>
> Knowing that this isn't "just a USB cable" helps to explain why this would be a relatively expensive cable, but at ~$90, you're still at a price points that's at least double what it should be.

I have a USB to TTL Serial Converter that I've used for programming ATmega chipsets and has TXD, RXD 3V3, GND and +5V ports, I just need to figure out which ones are which. I'm guessing I'd use the TXD and RXD, but which else should I use?

u/paidhima · 1 pointr/computers

It's not common on modern motherboards, but there are adapters. For example, this from Amazon. Check the gender on those connections, make sure straight-through works (or get a null modem adapter). You can add a serial to USB adapter to plug into any computer with a USB port and drivers.

u/bluehambrgr · 1 pointr/homelab

I just bought an FWS648G last week and the consoles are probably the same.

In my case, I just used a USB to RS232 DB9 adapter with a null modem F-F adapter F-F gender changer.

Edit: I was mistaken, turns out the cable I used was just a straight gender changer (not a null modem).

u/Missioncode · 1 pointr/homelab

its not too bad, I have X550e I picked for $75.

You'll need this. http://www.amazon.com/TRENDnet-TU-S9-USB-Serial-Converter/dp/B0007T27H8/ref=sr_1_3?ie=UTF8&qid=1459299559&sr=8-3&keywords=usb+to+serial

and this http://www.amazon.com/TRENDnet-TU-S9-USB-Serial-Converter/dp/B0007T27H8/ref=sr_1_3?ie=UTF8&qid=1459299559&sr=8-3&keywords=usb+to+serial.

I'm not saying you "have" to buy these, but I used like 3 different serial cables and two different usb adapters. Until I got theses.
2.1 is easy 2.2 and 2.3 are a bit tricky they require you disable DNL if you use a CF card.

u/_chrisjhart · 1 pointr/ccna

Believe it or not, the 2509 is actually cheaper than the module you're looking for.

The module that would support what you want to do is an HWIC-8A. On eBay, they range anywhere from $250-$1k. Not only that, but you would need a compatible router (basically, an 1841, 1941, or any 2800/2900/3800/3900 series ISR) as well as the appropriate cabling (CAB-HD8-ASYNC, about $20-$40 on eBay).

You might be able to use a smaller module (like an HWIC-4A/S or an HWIC-4T), but the wiring is going to be a pain (meaning, you're going to effectively be making your own cables using serial-to-RJ45 pinout adapters, then using rollover cables to connect to your devices) and the cost isn't much better than going with an HWIC-8A or 8A/S.

Why so expensive, you ask? Well, think of it from a business perspective. You're the netadmin for a medium-sized business, and after a network outage that cost the company $100K+ that was prolonged partially because you needed to drive 45 minutes to the datacenter to console into your core switch/router, you need an out-of-band management solution. The HWIC-8A/S is in pretty high demand because they allow any old ISR to suddenly be used as an access server. Furthermore, I believe it has two ports for a total of 16 connections. Throw four of those babies in your old 3825, and you have 64 individual connections you can console into. That means a single terminal server will allow you to console into the top-of-rack switches across your entire datacenter. Let's assume you want some redundancy, so you get a second terminal server to plug into the Aux ports of your network devices - you've solved a $100K+ problem for less than $1k in equipment costs.

You might be able to come up with a homebrewed solution using a physical Linux server and some USB-to-serial connectors, as described in this blogpost. However, if you need thirteen devices to have console access, and USB-to-serial converters are $10 a pop, and rollover cables are $5 a piece (maybe more, maybe less), you're getting close to access server-levels of cost anyway. So, might as well go for the "proper" solution and save yourself potential hassle in the future.

u/TheEngineeringType · 1 pointr/ccna

TRENDnet TU-S9 USB to Serial Converter https://www.amazon.com/dp/B0007T27H8/ref=cm_sw_r_cp_apa_s5wuxb8XTQ24G

I have a couple of these that work just fine.

u/Cferra · 1 pointr/HomeNetworking
u/ntrlsur · 1 pointr/homelab

check out the trendnet Tu-S9.. Never had a problem with em and they work great with Cisco Checkpoint and Foritnet devices.. https://www.amazon.com/TRENDnet-USB-RS-232-Serial-Converter/dp/B0007T27H8/

u/spyingwind · 1 pointr/Proxmox

If you have an adapter, you can pas the USB device to the VM with relative ease. The VM has full control of the device. Much in the same way that you would pass a USB flash drive, mouse, or keyboard.

The Serial Port that you are adding is only really for Host to Guest stuff like SPICE: https://pve.proxmox.com/wiki/Serial_Terminal

I think there is a way with editing the VM's .conf file. like adding args: -serial /dev/ttyS0 or something like that, I could be wrong.

USB us much easier to deal with and fairly inexpensive. Example