Product Overview

ACCESS NX is an IP audio codec that’s made to go anywhere. Designed from the ground up as a platform for CrossLock, our sophisticated custom reliability layer, we’ve optimized ACCESS NX to send and receive high-quality audio over even the most marginal networks.

Whether you want to go live from the sidelines, do your talk show from the road, or find a codec that’s versatile enough to handle anything, ACCESS NX is designed with you in mind.

Questions? Reach out to our sales team!

Contact an authorized Comrex dealer for pricing and availability.


  • AAC family and Opus encoders
  • CrossLock for secure and stable broadcasting
  • Switchboard for easier connectivity
  • Two mic-line inputs
  • Optional 4-channel mixer
  • Two USB ports
  • 5-inch capacitive touch screen
  • Built-in Ethernet port
  • Built-in battery – up to 6.5 hours of talk time (5 hours with mixer)
  • Compatible with all Comrex ACCESS & BRIC-Link models
  • EBU 3326/SIP mode for third-party compatibility
  • Free firmware updates
  • Top-notch technical support (English & Spanish)
  • 100% designed & built in the USA at our facility in Devens, Mass.
  • One year manufacturer’s warranty

IP Networks

ACCESS NX offers several ways to get connected.

ACCESS NX comes with a Wi-Fi modem, along with an integrated Ethernet port for connecting to wired DSL or broadband cable. Plus, you can connect to 4G/5G networks using USB cellular or Comrex Connect modems. ACCESS NX also features an integrated web browser, to make it easy to log into public IP Wi-Fi.

Mix and match your networks! ACCESS NX can support simultaneous connections to Wi-Fi, wired internet, or cellular modems, so you can make use of every bit of connectivity available to you.

Learn more about Comrex Connect Modems

Learn about more 4G Compatible Devices

CrossLock Technology

The most advanced network management tool on the market today, CrossLock gives users the ability to use multiple IP networks together simultaneously. When a new network is introduced, CrossLock will immediately evaluate how much bandwidth is available, while factoring in latency and jitter information, and combine the two connections to take advantage of all available bandwidth.

More than just combining networks, CrossLock can also monitor and dynamically adjust how much of your stream is being placed on each network, in real time. When necessary, CrossLock can apply appropriate error correction, recovery, or concealment techniques. And when a network becomes unusable, CrossLock can isolate it, without any user intervention.

Learn more about CrossLock

User Interface

Equipped with a 5-inch capacitive touch screen, it’s simple to operate ACCESS NX in the field. Plus, with an improved user interface, ACCESS NX is designed to be even more user friendly than its predecessor. No need for a stylus! Plus, colorful LED VU meters provide a clear visual indicator of clipping.


Switchboard for NAT Traversal

Switchboard is a feature that allows users to bypass common IP networking snags (like private LANs and firewalls) by routing data through a private server maintained by Comrex, making connections between your IP codecs even easier.

Reduce the strain on your IT department and worry less on remote day. Switchboard makes it easier to log on to unfamiliar Wi-Fi networks, like those you might encounter in hotels, schools, and wherever else you do a remote.

Switchboard is included in the purchase of any ACCESS codec.

Learn more about Switchboard


HotSwap is an enhancement to our CrossLock VPN Technology. It allows you to designate one network as a “backup” that will only be engaged when the primary fails. The system will warn of this status with a contact closure, and automatically fallback to the primary once it’s restored.

Backup STLs, dedicated links, and other mission-critical codec connections with this free feature that now ships included with all new ACCESS and BRIC-Link purchases. Older IP audio codec models can take advantage of HotSwap by updating to firmware 4.3 or higher.

For the ACCESS line, any supported network or modem can be a backup.

Learn more about HotSwap



The Comrex ACCESS NX Mixer accessory “docks” to the ACCESS NX Portable and expands the audio I/O to four mic/line selectable XLR Inputs and four stereo Headphone Outputs on 1⁄4″ jacks. All NX Portable audio connectors remain active during use of the Mixer, so the total number of Input/Headphone connector pairs increases to a total of six.

Contact a Comrex audio dealer to purchase.

Comrex Connect Modems

The Comrex Connect Modem is designed to support the unique needs of remote broadcasters. A high-powered, industrial strength 4G/LTE modem outfitted with a high-gain antenna, the Connect Modem is more powerful than most USB data modems available on the market, to handle the heavy data load of a broadcast over IP.

Leverage Two Connect Modems

Leverage the power of two Comrex Connect Modems with your ACCESS codecs for twice the reliability. CrossLock technology, our sophisticated custom reliability layer, bonds the available cellular networks and sends a single media stream, along with background and error correction information, resulting in a higher level of reliability for remotes.  

Learn more about Comrex Connect Modems

Contact a Comrex audio dealer to purchase a Connect Modem and be sure to specify which variety: US (for use with Verizon or AT&T networks), International (for use outside the US) or CJ (for use in China, Japan, Taiwan, Korea & Brazil).

The bracket mount options for ACCESS NX Portable are a Single Bracket (with one pouch to accommodate one modem) or a Dual Bracket (with two pouches to accommodate two modems). 

Small Case

Durable travel case, perfect for carry-on or shipping. Mixer cutout. Multiple foam inserts available.

Exterior Dims:
L 19.5″ x W 16″ x H 8.25″

Contact a Comrex audio dealer to purchase.


They Get Stations on the Air From Anywhere
“The biggest thing for me with the ACCESS is it just works… You plug it in, and you hit connect, and you’re there. I can’t imagine trying to do a remote without one.”

ACCESS NX Changes the Game for WSCO
“It’s functional and reliable, and it’s changed the game for our live play-by-play broadcasting. As far as quality standpoint and ease of use is concerned, we have been so happy. If you’re looking to take your station to the next level, it’s the way to go.”

ACCESS NX Delivers College Sports
“ACCESS is the best IP codec I’ve worked with, and arguably the best one in the market. In the eight years I’ve been using one, I’ve never had a major problem. If I have anything minor, I know that I can call the support team and get dedicated, knowledgeable experts who will be able to answer my questions.”

ACCESS NX Takes The Cardinals Abroad
“Our ACCESS units were our primary and only means of broadcast for most of the shows we pulled off while in London. I enjoyed using them — they performed flawlessly, and our programs sounded great.”

More Info

Product Support

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