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• DSL-504T as dumb ADSL modem

  - by petebob796

  I am trying to setup an existing DSL-504T ADSL router to work as a dumb modem for a DIR-825 wifi router. I am assuming I should try and move as much of the control to the DIR-825 as possible. It's a PPPoA connection so I don't think I can use bridge mode. Does anyone have any guidance on this? Should I have 2 subnets? Should I set the DIR-825 as the DMZ on the DSL-504T? Do I need to keep NAT and firewall enabled on DSL-504T? Basically I have it working but want to know if I have set it up correctly as I really want the QoS to work on the DIR-825.

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• Motorola NVG510 bridge mode

  - by Blacklight Shining

  I have a Motorola NVG510 modem from AT&T, and I would like to disable all routing functions and use it as just a modem. I have a Time Capsule that's already connected and broadcasting its own wireless network, which is how I've been connecting (it's been reporting a double-NAT error, which I assume is from the NVG510 also acting as a router). I followed the instructions in question six here, and I can connect as I did before, but my Time Capsule still has a double-NAT error. How do I put the NVG510 into bridge mode or otherwise fix the double-NAT error? (No, ignoring it does not count as a fix.)

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• Thomson TCM 420 internal firewall deactivation

  - by KB22

  Hi all, I'm having a really hard time with getting a box into active torrent mode. Windows firewall etc. is done, the actual problem seems to relate to the cable modem which is used to connect the box to the net. It's a Thomson TCM 420 which 'claims' to have an internal firewall. IMHO this internal FW keeps me from using the port I opened for torrenting. To cut it short: is there a way to disable that firewall? The web administration interface of the modem does not provide that option. thanks in advance K

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• Windows does not detect any modems anymore[HSPA]

  - by Shenal Silva

  By an accident i uninstalled my Connect manager (ZTE). but when i re-install it the virtual CD drive is detected but it does not detect the drivers. When i direct to the folder containing the relevant drivers(.sys files) still it doesnt detect. Then i tried a modem of a different brand Huawei the same problem presists As i understand it is not a device(brand) driver specific issue as it does not detect modem(dongles) of any brand. when i plugged in a different USB device(a pen drive) the driver is detected and it works perfectly. Please help me with the issue i have tried system restore but it doesnt work. I want a repair that works without re-installing windows [Edit] I tried Karan's suggested method with usboblivion it didnt work. now im sure that the issue does not deal with the registry

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• Configuring home wireless network

  - by dvanaria

  I'm new to setting up a home wireless network. I have Comcast tv/internet/phone service (modem included) as well as a wireless router. My question is pretty basic. How can I tell the performance of the following parts of the network? 1. incoming internet speed 2. speed of the modem 3. speed of the wireless router I basically want as fast an internet connection as possible, of course, but I'm not sure where to look for the bottleneck (and so, not sure where I can spend some money to speed things up). Right now I'm getting about 36 Mbps (as it shows in Windows). If I run an online speed test (xfinity has one) it shows Average download speed of 14.91 Mbps and Average upload speed of 5.72 Mbps. Thanks for your help.

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• Mac Mini's internet very slow, every other device fine (PC, iPhone, Xbox 360)

  - by alex

  I recently haven't used my Mac Mini for about 5 days (however it was left on). I seem to be able to connect and get great download / upload speeds through my PC, Xbox 360, iPhone and parents' laptop. However, my Mac Mini is very slow. OS X's Mail.app is downloading mail at 0.4kbps and then dropping to 0. Skype file transfers are doing the same. Browsing the net is a terrible experience. It is taking 30 seconds or more to download basic pages. All of my devices connect wirelessly to a Netgear router / modem. I have tried giving the Mac Mini a manual IP, and renew DHCP lease, as well as flush DNS in Terminal. I have also rebooted the router / modem twice, and the Mac Mini twice. Do you know what could be causing this? Thanks

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• Making a home group

  - by Siddharth Warrier

  I have two computers in my house they are laptop and desktop and I use internet which is of wired connection and it has a modem. The modem has 1 LAN port and 1 USB port. So what I did is that I connected the desktop to the LAN which had Windows 7 Home Premium OS and Laptop to the USB which had Windows 7 Home Basic. As home group can be made with windows 7 home premium and above versions I made it via desktop. The home group was established and the data can be exchanged.But one problem I was able to access internet in desktop but not in laptop. So I tried to share internet but I am not able to do so..... So anyone there to help me ???????

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• dialup connection script

  - by BParker

  I've just started working for a company who produce a specialist modem. In the test department they simulate actual use with a bunch of pc's acting as clients connecting over this modem. As such each needs to dial a set of dial-up connections. Each of these has to be created manually, and currently takes quite a while on each machine, so i was hoping to be able to automate the creation process. Back in the early days of the internet i remember getting CD's from ISP's where the dial-up connection was configured automatically, and i was wondering if anyone lknew how to do this, or if they could point me in the direction of a tutorial about it. To be clear, i don't want to automate actually dialing the connection, but i do want to run a script which creates the icons in the networking applet that allows us to dial these connection. Thanks in advance!!!

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• How to activate HSDPA Huawei E219 in Ubuntu 9.10?

  - by yuv

  Now I have inet through this modem but it's very slow. thanks in advise.

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• Could not open IPV6 addr on web browser

  - by vito

  I have ipv6 address fe80::21f:a4ff:fe91:2e44%4. This is the address of modem/router. I am unable to open this address in browser to view the web configuration. I am able to telnet to fe80::21f:a4ff:fe91:2e44%4, view the console UI & can do settings. I can also open 192.168.1.1(IPv4 address of modem/router) in browser. I tried [fe80::21f:a4ff:fe91:2e44] in all browsers like IE, Firefox & Chrome. It was not possible.

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• How a router decides destination of packet?

  - by user58859

  I have basic networking question. Scenario : Two pc's are communicating on a wan. Both the pc's ate behind routers or modems. My question : Both the pc's have public IP of each other. That public IP is most of the time is either of the router or of the modem. There can be more then one pc's behind those routers and modems. Then how the pc's are communicating. I can understand the packets can reach upto those routers or modems. But what after that. In the packet , destination IP is public IP. Then how the router or modem decides where to send the packet? Can anybody explain me this please. Thanks in advance.

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• Connect to a particular network connection from terminal

  - by RanRag

  I am currently using Reliance netconnect USB modem. The problem I am facing is my USB modem disconnects itself at 22:00 PM IST everyday. Now, sometimes what I do is start some downloading and leave my laptop for 2-3 hours in this case if my network disconnects it is a problem for me. So, what I used to do in windows is make a python script and execute rasdial myconnection_name to automate the connection process in my absence. Now I want to achieve something similar in linux. So, what are my alternatives for rasdial like tool in linux to automatically connect to a particular connection . I am using ubuntu 12.04 and here is my nm-tool output.

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• ADSL Modem/Router sometimes hands out incorrect IP addresses

  - by Peter Keevill

  My setup is as follows:- Main ADSL modem / router (switch) configured as DHCP server with address range 192.168.0.25-60 The office machines are configured with fixed IP ( not in the same address pool of course ) and hard wired to this router. A wireless access point ( Router ) is connected to provide Internet access for guests in a separate area. This router is NOT configured as a DHCP server. Wireless authentication is turned off. IP address lease times are set to 4 hours. Sometimes guests are able to connect to the wireless access point but they are not given a valid IP. They get 169.x.x.x addresses. Rebooting their machines does not resolve the problem. The only way to resolve is to reboot the main ADSL/router which is often frustrating for other users who are successfully connected with valid IP and DG. The problem seems to occur more frequently to Apple/Mac guests although it also sometimes occurs with Win machines. I personally use Ubuntu on my Laptop and thus far, never have had any problem connecting and getting a valid IP address in the guest area. One further point of note which may give a clue is that certain guests ( always Apple/Mac ) get lease times of 90 days. However, this does not 'stack out' the number of available addresses and of course, rebooting the router clears them until the next time they login.

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• WinXP - Having trouble sharing internet with 3G USB modem via ICS

  - by Carlos Nunez

  all! I've been banging my head against a wall with this issue for a few days now and am hoping someone can help out. I recently signed up for T-Mobile's webConnect 3G/4G service to replace the faltering (and slow) DSL connection in my apartment. The goal was to put the SIM in one of my old phones and use its built-in WLAN tethering feature to share Internet out to rest of my computers. I quickly found out that webConnect-provisioned SIMs do not work with regular smartphones, so I was forced to either buy a 4G-compatible router or tether one of my old laptops to my wireless router and share out that way. I chose the latter, and it's sharpening my inner masochistic self by the day. Here's the setup: GSM USB modem (via hub), ICS host - 10/100 Mbps Ethernet NIC, ICS "guest" - WAN port of my SMC WGBR14N wireless router in bridged mode (i.e. wireless access point). Ideally, this would make my laptop the DHCP server and internet gateway with the WAP giving everyone wireless coverage. I can browse internet on the host laptop fine. However, when clients try to connect, they get a DHCP-assigned IP from the laptop and are able to use the Internet for a few minutes before completely dying. After that happens, they are able to re-associate with the WAP and get IP addresses, but are unable to use Internet or resolve IP addresses until the laptop and router are restarted. If they do get access, it's very, very slow. After running Wireshark on the host machine, it turns out that this is because every TCP connection keeps getting RST. DNS seems to work. I would normally think the firewall is the culprit here, but when it drops packets, it drops them completely. The fact that TCP connections are being ACK'ed by the destination rules that out. Of course, none of the event Log isn't saying anything about what's going on. I also tried disabling power management on the NIC, since that's caused problems in the past; that didn't help either. I finally disabled receive-side scaling as per a Microsoft KB (that applied to Windows Server 2003, SP2) to no avail. I'm thinking of trying it with a different NIC (will be tough; don't have a spare Ethernet NIC around for the laptop), but I'm getting the impression that this simply doesn't work. Can anyone please advise? I apologise for the length of this post; all contributions are much appreciated! -Carlos.

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• How to make data voice call using GSM modem in asp.net

  - by ALi Shafiquee

  I want to make web application that makes data voice call using GSM modem in asp.net

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• send sms in asp.net by gsm modem

  - by danar jabbar

  I devloped an asp.net application to send sms from gsm modem to destination base on URL from the browser I used a library that developed by codeproject http://www.codeproject.com/articles/20420/how-to-send-and-receive-sms-using-gsm-modem but I get problem when I request form two browsers at same time and I want to make the my code detect that the modem is use by another process at the time here is my code: DeviceConnection deviceConnection = new DeviceConnection(); protected void Page_Load(object sender, EventArgs e) { try { if (Request.QueryString["destination"] != null && Request.QueryString["text"] != null) { deviceConnection.setBaudRate(9600); deviceConnection.setPort(12); deviceConnection.setTimeout(200); SendSms sendSms = new SendSms(deviceConnection); if (deviceConnection.getConnectionStatus()) { sendSms.strReciverNo = Request.QueryString["destination"]; sendSms.strTextMessage = Request.QueryString["text"]; if (sendSms.sendSms()) { Response.Write("Mesage successfuly sent to " + Request.QueryString["destination"]); } else { Response.Write("Message was not sent"); } } } } catch (Exception ex) { Console.WriteLine("Index "+ex.StackTrace); } } This is SendSms class: class SendSms { DeviceConnection deviceConnection; public SendSms(DeviceConnection deviceConnection) { this.deviceConnection = deviceConnection; } private string reciverNo; private string textMessage; private delegate void SetTextCallback(string text); public string strReciverNo { set { this.reciverNo = value; } get { return this.reciverNo; } } public string strTextMessage { set { this.textMessage = value; } get { return this.textMessage; } } public bool sendSms() { try { CommSetting.Comm_Port = deviceConnection.getPort();//GsmCommMain.DefaultPortNumber; CommSetting.Comm_BaudRate = deviceConnection.getBaudRate(); CommSetting.Comm_TimeOut = deviceConnection.getTimeout();//GsmCommMain.DefaultTimeout; CommSetting.comm = new GsmCommMain(deviceConnection.getPort() , deviceConnection.getBaudRate(), deviceConnection.getTimeout()); // CommSetting.comm.PhoneConnected += new EventHandler(comm_PhoneConnected); if (!CommSetting.comm.IsOpen()) { CommSetting.comm.Open(); } SmsSubmitPdu smsSubmitPdu = new SmsSubmitPdu(strTextMessage, strReciverNo, ""); smsSubmitPdu.RequestStatusReport = true; CommSetting.comm.SendMessage(smsSubmitPdu); CommSetting.comm.Close(); return true; } catch (Exception exception) { Console.WriteLine("sendSms " + exception.StackTrace); CommSetting.comm.Close(); return false; } } public void recive(object sender, EventArgs e) { Console.WriteLine("Message received successfuly"); } } }

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• DHCP not responding from laptop or router, but works on directly plugged PC?

  - by Matt H

  I'm at my sister in law's place in Singapore. I'm not from Singapore but am here for a few months. She has some sort of cable modem made by motorolla (SB5101 Surfboard). I think it goes, through starhub or similar provider. Anyhow, her PC is directly attached by cable (not wireless) and she can access the internet. There is no wireless router connected to it. The PC is configured with DHCP and appears to be working. However, the moment I unplug her PC and plug in my laptop, it doesn't get an address. The interesting thing here is that I also see this toredo tunnel adaptor etc. I'm not familiar with what that is. It appears to be being assigned an IP v6 address and an IP v4 address. I thought perhaps it's my laptop, but also when I plug in my DDWRT based router, it also fails to get a DHCP assigned address on the WAN port. I can't also seem to connect into any web configuration on the motorolla modem either. Any ideas? what kind of setup is this? all I'd like to do is plug in my wireless router so I can roam around the house and also access the internet.

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• Limiting bandwith on an Windows 7 machine

  - by Mihai Damian

  I need to limit the bandwidth on my Windows 7 x64 machine. In the past (on XP) I've been able to use NetLimiter for similar tasks. However for some reason I can't get it to work anymore. For lower limits the bandwidth tests are able to exceed the limit by 10-50%; higher limits seem to be ignored completely and the bandwidth tests report download speeds of over 10 times the speed I set. I'm using speedtest.net and some similar service from my ISP for these tests. Anyway, I don't necessarily need a program as complex as NetLimiter since I only need to throttle my machine's bandwidth, not a specific program's. In case you are wondering why in the world I'd want to cripple my Internet speed, there is a funny story behind this. Long story short, my modem gets random disconnects. Tech support comes in, says my Internet speed is abnormally high and I must be using some tools to somehow make it go faster than it's supposed to and this messes up my modem. I check the connection with another computer and it seems that my PC is the only one in my network that gets abnormal speeds. I reinstall my OS, speed looks normal at first, after I install the batch of 50 or so updates, it goes back to abnormally high speeds and the disconnect problems are not solved. Now I don't have a clue if the explanation the tech team gave me was just a strategy to lay the blame on someone else, but I was trying to give them the benefit of the doubt and see what happens if I really reduce my speed to their specification. Any help appreciated.

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• Mac Mini's internet very slow, every other device fine (PC, iPhone, Xbox 360)

  - by alex

  I recently haven't used my Mac Mini for about 5 days (however it was left on). I seem to be able to connect and get great download / upload speeds through my PC, Xbox 360, iPhone and parents' laptop. However, my Mac Mini is very slow. OS X's Mail.app is downloading mail at 0.4kbps and then dropping to 0. Skype file transfers are doing the same. Browsing the net is a terrible experience. It is taking 30 seconds or more to download basic pages. All of my devices connect wirelessly to a Netgear router / modem. I have tried giving the Mac Mini a manual IP, and renew DHCP lease, as well as flush DNS in Terminal. I have also rebooted the router / modem twice, and the Mac Mini twice. Do you know what could be causing this? Thanks Update This is very weird. It is also very slow accessing localhost (setup through MAMP) and also slow to access the Netgear router config pages.

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• Is there the equivalent of cloud computing for modems?

  - by morpheous

  I asked this question on SF, and someone recommended that I ask it here - (I don't think I have enough points to move a question from SF to SO - and in any case, I don't know how to do it - so here is the question again): I am interested in the concept of PAAS (platform as a service). However, all talk about SAAS/PAAS seems to focus on only the computer itself - not its peripherals. Is it possible to 'outsource' modems as a resource - so that an app running remotely can pump data to a modem in the cloud? As a bit of background to the question, a group of us are thinking of starting a company that offers similar services to companies like twilio etc - but I want to 'outsource' both the computing hardware (thats PAAS - the easy bit) and the modems (thats what I cant seem to find any info on). Does anyone know if modems can be bundled as part of a PAAS service? - alternatively, is there a way that an application running on one computer can communicate (i.e. pump data) to a remote modem residing on another machine?. I assume I can come up with some protocol over UDP or TCP - but there is no point reinventing the wheel - if such a protocol like that already exists (or if it some open source software allows one to do this). Any suggestions on how to solve this problem?

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• Home network with two isolated separate subnets, running on cablemodem/router and WRT-router.

  - by Johan Allgoth

  I have a new connection with a nice new router/cable-modem. I'd like to setup it up optimally and needs some pointers. I am a complete n00b when it comes to routing. I want to end up with two separate subnets, 10.1.2.0/24 and 192.168.1.0/24 each available on their own wireless channel/SSID. Both firewalled. I want my wired computers on the gigabit switch, optimally with public ips. I want to be able to reach 192.168.1.0/24 from 10.1.2.0/24, but not vice versa. Everyone should have internet access. Hardware and capabilities: Netgear CG3100. Handles cable connection. Gigabit switch. 802.11n. Can do DHCP, firewall, NAT etc. Can choose subnet. Can turn of NAT and if so hand out up to 4 public ips. Somewhat challenged when it comes to configuration. WRT-router. Runs DD/Open-WRT very stable. 100 Mbit switch. 802.11.g Can do DHCP, firewall, NAT etc. Can choose subnet. Highly configurable. I hope to be able to keep 10.1.2.0/24 on the CG3100, for speed reasons and 192.168.0.0/24 on the WRT-router for quota and user control reasons. On my 10.1.2.0/24 network I plan on running servers for various services. Should I turn of NAT on the WRT-router? Or on the cable modem? Activate what in that case? Is double NAT always f-ed up?

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• Can I share my cable internet connection through my ADSL wireless router?

  - by Roaders

  Hi All Over the xmas period I am at my in-laws. They have Virgin Broadband (cable) and have a basic modem / router that is plugged directly into their computer using an ethernet cable. My wife and I arrived with 5 PCs! (ok, one is a gift and won't be used) 4 of which are laptops so I would like to be able to use their internet connection. At the moment I am working so have plugged the ethernet cable into my work laptop. Rebooting the router meant that my work laptop now has internet. I have my ADSL Netgear router which is wireless. I tried plugging it in between the router and the PC but I didn't seem to be able to share the internet connection wirelessly. The original PC still had internet despite ony being connected to my router but my wireless laptop didn't have a connection. My old cable router had an internet ethernet port on the back that the modem plugged into. My ADSL router doesn't, it has a phone connection socket. Is there a way of doing what I want with the equipment I have? Thanks

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• DSL Connection drops

  - by user60024

  Ok, I just moved so I had to switch from Cable to DSL. I know very little about computers or internet connections and such, so I had AT&T come out to the new house to set up their highest speed. When they got here, they told me that I needed to downgrade to 3.5mbps because I was too far away. Well we did and everything was going great for two days until I started experiencing random disconnects which have been happening now for about 2 to 3 weeks. I am using a N300 Wireless Dual Band ADSL2+ Modem Router and my ethernet cable is hooked directly into my computer from it. I recently started to notice that it disconnects around 5:30 and 8:30, which may be because a lot of people are on their computers(?) and that it works perfectly fine, almost, all the time if I'm not playing a game. During this time, when I try to load up World of Warcraft the Internet light disappears and the DSL light begins blinking. (So maybe it's too much for the modem and it resets?) Other than that it is amazing, but I'd like to try and fix some of these problems. If you need more information, let me know on how to get it for you and what to do. Thanks for the help!

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• Limiting bandwith on an Windows 7 machine

  - by Mihai Damian

  I need to limit the bandwidth on my Windows 7 x64 machine. In the past (on XP) I've been able to use NetLimiter for similar tasks. However for some reason I can't get it to work anymore. For lower limits the bandwidth tests are able to exceed the limit by 10-50%; higher limits seem to be ignored completely and the bandwidth tests report download speeds of over 10 times the speed I set. I'm using speedtest.net and some similar service from my ISP for these tests. Anyway, I don't necessarily need a program as complex as NetLimiter since I only need to throttle my machine's bandwidth, not a specific program's. In case you are wondering why in the world I'd want to cripple my Internet speed, there is a funny story behind this. Long story short, my modem gets random disconnects. Tech support comes in, says my Internet speed is abnormally high and I must be using some tools to somehow make it go faster than it's supposed to and this messes up my modem. I check the connection with another computer and it seems that my PC is the only one in my network that gets abnormal speeds. I reinstall my OS, speed looks normal at first, after I install the batch of 50 or so updates, it goes back to abnormally high speeds and the disconnect problems are not solved. Now I don't have a clue if the explanation the tech team gave me was just a strategy to lay the blame on someone else, but I was trying to give them the benefit of the doubt and see what happens if I really reduce my speed to their specification. Any help appreciated.

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• How can I use my cell phone to establish a dial-up networking connection?

  - by gWiz

  I am using Windows 7 and have a BlackBerry with T-Mobile (U.S.). I have paired the phone with my computer over Bluetooth, which automatically creates a serial port for it. I am able to open the port in PuTTY and successfully issue AT commands to the modem, including dialing. However, while using Windows to create and establish a Dial-Up Networking connection, I get an error dialog stating "Error 678. The remote computer did not respond." In my testing, I also tried setting up a connection to dial a number connected to a phone. When attempting to connect over this connection, the phone does ring but the very moment I answer the call, my computer displays the above error dialog. What must be done to successfully establish such a PPP connection? Some special AT initialization string perhaps? To clarify, I'm not referring to the well-described and popular technique known as "tethering," in which the remote host of the data link is the mobile service provider. I am interested specifically in establishing direct data links with remote hosts other than my mobile service provider. Think old-school landline connection to your friend's computer or BBS. Edit 1 As grawity pointed out in comments, the missing piece of the puzzle is the actual modulator that is compatible with v-series protocols, which I expected to be built into the cellphone. So far the best only software alternative I could find is this experimental project. Edit 2 Found this forum discussion today. The participants state that there is no old-school modem in the BlackBerry. Edit 3 When I place a call in PuTTY with ATD, immediately after the call is answered (and the callee is initiating the handshake) the cellphone returns OK. This is not the expected behavior for establishing a data connection. The phone should reciprocate the handshake, and upon success return CONNECT. (Alternatively it should return BUSY or NO CARRIER, but never simply OK.) Windows DUN must be interpreting this as the "Error 678" I was seeing.

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