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Model 4691 eTwinPrint (e-Twinax) Controller
Support for 1 Twinax Printer Over any TCP/IP Connection

e-Twinax Controller - Model 4691

Twinax-to-IP Print Server for Power7, Power6, Power5, System i, and iSeries AS/400 Twinax Printers - Local or Remote

(Click here to see other eTwinax Models)

Please Note:  We offer the eTwinax Controller as a REFURBISHED product only.  Please call 800-597-2525 to check availabilityIf you would prefer a new controller with 3-year warranty we recommend the I-O Corporation Xip+ Twinax Controller.  Click here and you will be re-directed to the Xip+ Twinax Controller page.


The e-TwinPrint Protocol Converter lets Twinax Printers Run Over TCP/IP to you iSeries or AS/400

Your workhorse Twinax printers (SCS and IPDS) printers in can be easily supported over your corporate LAN/WAN/VPN.

Protect your Twinax printer investment, even as you move the rest of your organization to a LAN environment.

The e-TwinPrint creates the configuration on the host AS400 or iSeries for you using Remote Commands.  There is no need for your to create the device.  This is especially helpful when configuring AFP/IPDS printers. It automatically selects the proper PSF/400 parameters for you.

Just plug your Twinax printer into the e-TwinPrint and connect it to your Ethernet network with a CAT5 cable and you can run your Twinax printers over TCP/IP while retaining all the functionality of a Twinax printer - error reporting, page range printing, etc.


  • Web-managed configuration and management. Unlike others that require a PC with configuration and management software to be installed on the same LAN, the e-TwinPrint can be managed remotely over the Web. This permits IT staff to handle problems directly, without having to talk an end user on location through complex diagnostics.

  • Dumb Terminal Setup. Initial setup can be performed with a dumb terminal, an advantage when the device is located in a small remote site without a PC.

  • IPDS Printing. With the e-TwinPrint, the remote command service is used to create and maintain the IPDS printer device description on the host.

  • SCS Printing. The e-TwinPrint implements TN5250e technology to provide support for all SCS printers.

Ordering Information


All "ADD TO CART" models are currently in stock as of .
These prices are limited to our current inventory.



Please call us at 800-597-2525 or 1-908-688-8100 to discuss your application or if you have any questions.

Information Request Form

Model 4691 eTwinax Controller / eTwinPrint - 1 Twinax Printer Support


eTwinax Controller Information Request Form

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eTwinax Information Request - New 062218

RJ45 Host Port Option (e-TwinStar) Eliminates Need for Active Star Hubs

Rear view of e-TwinST@r Controller
with RJ45 unit attached

The e-Twinax Controller now has an optional model that includes a built-in unit featuring 8 (or 16) RJ45 sockets. Twinax devices working over CAT5 lines are connected directly to the Controller, saving the cost of an active star hub and eliminating the need for power sources and additional space in the communications closet, as well as the extra set-up and maintenance time.  The RJ45 Ports of this option operate just as a Twinax port with an RJ45 Balun attached to it.

If you need to connect more Twinax Devices than the number of physical ports on an e-Twinax Controller, please read the explanation in the next section.  The e-Twinax Controller model must be able to support the number of devices you need to connect.

The e-TwinStar (4800 Series) is available in models with support for 8, 16, 28, 56 or 112 Twinax addresses/devices.  The 4800 Series is fully upgradeable from one model to the next allowing for growth from 8 to a full 112 device support.  The 4800 Series also supports connection of the 8-Port Twinax Brick as the e-Twinax 4600 Series as well as the IBM 8-Port Twinax Brick from your existing Internal Twinax Workstation Controllers.

Upgrades are made by simple entering a new software key in the configuration section of the e-Twinax. You can upgrade remote locations by accessing the upgrade portion of the configuration over your WAN.  Upgrading is done while the controller is in full operation.  There is no need to have those users connected to it brought down.  This eliminates the need other controllers have to bring them down while increasing their device capacity or adding options.

Explanation of Device Support 
for the eTwinax and RJ45 Ports of e-Twinax Controller

As with the standard AS/400 8-port "Twinax Brick" from the Twinax Workstation Controller, each Host Port (Twinax or RJ45) of the e-Twinax will support up to a maximum number  of 7 device addresses (0, 1, 2, 3, 4, 5, 6), up to the maximum number of devices the particular model controller will support.  This convention holds true to all Twinax or RJ45 Host Ports of S/36, S/38, AS/400, iSeries and all IBM, Decision Data, I-O, Idea, and Perle Remote Controllers except for the very old 5251-12 and 5294 controllers that only supported a maximum of 4 addresses per Host Port.

For example, an IBM 5394-01B Controller has three Twinax Host Ports.  Three ports with 7 devices each would total 21.  The 5394-01B only supports 16.  You can distribute those 16 device addresses across those three ports however you see fit.  That could be 7 on the first port, 7 on the second port and 2 on the third port.  You could also have 6, 6 and 4 or any other combination that totals 16 device addresses with a maximum of 7 on any one port.

Another example is the 4616 (Twinax Host Ports) and 4816 (RJ45 Host Ports) of the e-Twinax Controllers.  Both of these models will support 16 Twinax addresses/devices but only have 8 physical ports.  Using the same logic as with the 5394-01B example, you can connect devices to ANY of these 8 ports as long as the total number of addresses used is 16 or less.  For example you could use the same 7, 7, and 2 on the first three Host Ports as with the 5394.  Being these models have 8 Host Ports, you could also put 2 devices on each port for a total of 16.  You could also have 4, 4, 4 and 4 on four of the 8 Host Ports or any other combination that totals 16 device addresses with a maximum of 7 on any one of the 8 ports.

If you need to connect more physical devices than the number of ports you have two options.

First, you can "cable-through" your Twinax devices from one to the next using actual Twinax cables.  Using this method you can connect up to 7 devices to a single Host Port.  If you are using multiple session terminals, the number of physical devices would be less as each Host Port will only support 7 addresses.   

Second, you can add a Twinax-to-RJ45 Active Star Hub such as the IBM 7299 Active Star Hub to your setup.  These Active Star Hubs connect to one of the controllers Host Ports either by Twinax Cable or Category 5 (CAT5) cable, and expand the single port to 7 RJ45 ports corresponding with the device addresses available on that port of 0, 1, 2, 3, 4, 5, and 6.  This is the same whether the e-Twinax Controller has Twinax Host Ports or RJ45 Host Ports.  In this implementation each Twinax Device would be required to have a Twinax-to-RJ45 Balun on it to allow connection with a CAT5 cable.

The RJ45 Host Ports of the e-Twinax Controller are operationally the same as a Twinax Host Port with an RJ45 Balun attached to it. 040416



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