I have just tried to install a new Cox panoramic router and it is not working. A tech installed two new networks WIFI with 2.4 speed and it works but slow. The other WIFI 2 with 5g and also 2.4. Neit...
I don't have Panoramic but I'll surmise you actually have 3 wireless networks. One is your personal wireless network and the other is a wireless Cox Hotspot.
First, the "2.4" GHz is a rounded number because frequencies breakdown into the thousandths. For example, a 2.4 GHz frequency could actually be a 2.412 GHz. In North America, there are 11 of these "breakdowns" and are called Channels.
Panoramic has 2 frequencies for your personal wireless: 2.4 and 5 GHz. As Chris noted, 1 has a longer range but the other is faster. On your personal wireless, Cox recommends to name the 2 frequencies (2.4 and 5) with the same SSID. SSID is another word for the name of your wireless network. For example, "ChucksWiFi" would be an SSID. Although it's 2 frequencies, I'd say its 2 networks but each has the same SSID so it could be argued as 1 network. (Thoughts?)
The other wireless network, Cox Hotspot, is also 2.4 GHz but on a different channel, such as (for example) 2.462 GHz, so it shouldn't interfere with your personal wireless.
Therefore, with 2 networks (personal and Hotspot), you have 2 login credentials. One set of credentials is for your personal wireless and if the tech didn't change it, it should be listed on the sticker of your Panoramic. The Hotspot credentials should be your Cox username and password. I'm unsure about Hotspot credentials because I've never used it.
Make sure you're using the correct credentials for the applicable network. If you want to disable the Hotspot while troubleshooting, use widermouthopen's instructions at