No 5Ghz signal from E4200 After Flashing

Discussion in 'Cisco/Linksys Wireless Routers' started by NephewJim, Nov 9, 2013.

  1. NephewJim

    NephewJim Reformed Router Member

    Yesterday, I installed a refurbished E4200 according to Cisco’s directions on my home office computer. I then updated the unit’s firmware to Cisco’s 1.0.05 (build 7). All that went smoothly.

    About 30 minutes later, I installed Shibby’s latest for that model (tomato-E4200USB-NVRAM60K-1.28.RT-N5x-MIPSR2-114-AIO.bin). That install went smoothly.

    As part of the install I gave the two bands separate names. Let’s call one (SSID)2.4 and the other (SSID)5.0.

    Here’s where it seems a problem exists. The wireless connection list on my laptop, my daughter’s tablet and my wife’s and my cell phones all see and easily connect to (SSID)2.4 but none offer an option to connect to (SSID)5.0. In fact, my phone (HTC VIVID) does include (SSID)5.0 in the list but says “Out of Range” even though I was holding it approximately 30-inches from the E4200.

    All the wireless items I’m trying to connect were purchased within the past year and show 802.11 b/g/n in the Wi-Fi specifications.

    I contemplated performing a 30-30-30 and reflashing with the same Shibby file but didn’t know if that would brick the modem. Reaching out to this group first seemed a wiser course of action.

    I’m as green as grass on modems, LANs, WANs and the rest. It seems that I should share other information so you can help me but I don’t know enough to gauge what is important.

    I appreciate your help troubleshooting and correcting this problem.
  2. Marcel Tunks

    Marcel Tunks Networkin' Nut Member

    Do your wireless devices have 5GHz antennas? Most n devices don't.

    Did you erase NVRAM after flashing? (administration section in the GUI)
  3. howardp6

    howardp6 Network Guru Member

    Your devices are 802.11 b/g/n, but maybe only 2.4Ghz devices. The devices have to be 802.11 a,b,g,n to be able to use the 5Ghz band.
  4. NephewJim

    NephewJim Reformed Router Member

    Marcel and howardp6,

    Thanks for responding and I believe I've proved my green as grass statement. My assumption was that all newer units were capable of pulling in the 5GHz signal. I'll do more research on these particular devices.

    If you don't mind, I'd like to ask a few questions.

    1. What devices (or type of devices) are 5GHz compliant? I've read so many message boards and it appears many users are happy with the E4200 and its 5GHz capability. Many seem to reference XBox or PSP and I don't have either. Maybe it is just as howardp6 surmised and I don't own any 5GHz devices.

    2. Can either of you recommend a freeware program that I can install on my PC to show whether or not the E4200 is emitting a 5GHz signal? I'm starting to wonder if I've spent 3 days fretting and trying to fix a problem that doesn't exist.

    3. Would the 5GHz issue surface because I've yet to call Comcast to bridge its modem/router? I've been reluctant to make that call because I wanted a safety net in case the Tomato flash didn't go right. Now, I'm wondering if the E4200 problem I've been trying to remedy is actually caused by my reluctance to remove the safety net.

    4. Finally, I've spent exhaustive hours on this and other boards reading -- and trying -- various tweaks users apply to enhance Shibby's latest. Can either of you recommend a "guru" whose posts I can search that provides a guidebook or suggestions on tweaking Shibby's software to obtain maximum performance from the modem? All I'm trying to do is identify knowledgeable people and cut through the clutter. I'm not asking either of you to work on my behalf.

    In advance of your prospective reply, please know I appreciate any counsel you are willing to share.


  5. Marcel Tunks

    Marcel Tunks Networkin' Nut Member

    1. Most wireless devices still use 2.4GHz. Some newer tablets, smartphones, and WiFi adapters include a 5GHz antenna. Google the model name and a word like "specifications" to see if a 5GHz antenna is present.

    2. Your computer will detect a 5GHz signal only if there is a 5GHz WiFi adapter. Inexpensive USB WiFi adapters are available. Despite the company's history, many people in this forum have had good experience with TP-Link devices.

    3. Unrelated. Your E4200 will broadcast its wireless signal without any attached ethernet cables.

    4. The default Tomato settings are suitable for most purposes. I would advise not going into adjusting timeouts or doing any "TCP tuning" until you have a firm understanding of the basics. (Even then, it's usually not advisable. Tomato works very smoothly with default settings.) How fast is your internet connection? Much of how the Basic and Advanced settings should be arranged depends on:
    (a) the speed of the connection (It might be helpful to know the answer before bridging the Comcast modem. You can find out by going to from a PC wired to the modem with no other active traffic on your network.)
    (b) the number of client devices accessing the internet
    (c) the types of traffic (torrents, video streaming, gaming, VoIP, web browsing, VPN, etc...)
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