/>
X
Why you can trust ZDNet
Our recommendations are based on many hours of testing, research, and comparison shopping. We may earn a commission when you purchase a product through our links. This helps support our work but does not influence what we write about or the price you pay. Our editors thoroughly review and fact check every article. Our process

'ZDNet Recommends': What exactly does it mean?

ZDNet's recommendations are based on many hours of testing, research, and comparison shopping. We gather data from the best available sources, including vendor and retailer listings as well as other relevant and independent reviews sites. And we pore over customer reviews to find out what matters to real people who already own and use the products and services we’re assessing.

When you click through from our site to a retailer and buy a product or service, we may earn affiliate commissions. This helps support our work, but does not affect what we cover or how, and it does not affect the price you pay. Neither ZDNet nor the author are compensated for these independent reviews. Indeed, we follow strict guidelines that ensure our editorial content is never influenced by advertisers.

ZDNet's editorial team writes on behalf of you, our reader. Our goal is to deliver the most accurate information and the most knowledgeable advice possible in order to help you make smarter buying decisions on tech gear and a wide array of products and services. Our editors thoroughly review and fact-check every article to ensure that our content meets the highest standards. If we have made an error or published misleading information, we will correct or clarify the article. If you see inaccuracies in our content, please report the mistake via this form.

Close

Aastra 9133i

The Aastra 9133i is distinctly uninspiring to look at: it's finished in a matt dark charcoal, with a few of its buttons highlighted in red, orange and pale green. On the other hand, this phone is extremely rich in functionality for its class.
zd-defaultauthor-terryacousticmasters-com.jpg
Written by Terry Relph-Knight on
voipaastralead.jpg
5.0

Aastra 9133i

OK
Like
  • Large number of buttons high feature count backlit LCD
Don't Like
  • Uninspiring design complex setup no soft keys around the display

The Aastra 9133i is distinctly uninspiring to look at: it's finished in a matt dark charcoal, with a few of its buttons highlighted in red, orange and pale green. On the other hand, this phone is extremely rich in functionality for its class.

Although the clip-on plastic wedge stand only raises the Aastra 9133i to a modest 20 degrees, visibility of the status display can be improved because the status panel itself is hinged and will swivel, to bring it up to a 45-degree angle with the desktop. The stand can be reversed for wall mounting. All of the connections are on the underside on this phone and, with the desk stand clipped in place, are hard to access.

The reasonably sized (11.5mm), square keypad buttons, are flanked on the right by a vertical row of eight narrow function keys. The lower four of these are coloured a light green and have a red LED indicator next to them. The bottom of these green buttons selects between handset, speakerphone or headset operation and the other three are line/account selectors. Above these are four grey buttons for redial, transfer, conference and received calls list.

Above the keypad there’s a red call hold button and an orange call end /operation cancel button. Below the keypad there is a horizontal rocker bar for general volume adjustments of the handset, headset, ringer and loudspeaker.

A row of twelve small buttons along the right edge of the phone also have associated red LED indicators. A thin cardboard insert (plus two spares) with a separate plastic cover is supplied, to clip into a recess alongside them. The top four of these buttons are labelled; Options, Directory, Save and Delete. The next seven of these buttons are programmable and can be assigned either as speed dial buttons, as extra line selects, or as one of a range of other functions, such as flash or do-not-disturb. The last of the twelve is a mute button. A diamond of four keys below the LCD panel allows for navigation through the setup menu or internal number directory. All the buttons on this phone have a soft, squashy, feel.

Configuration requires entering permutations of the same basic four pieces of information into a minimum of twelve boxes, but at least the boxes are all on the same Web page.

Top ZDNet Reviews

Raspberry Pi 4
raspberry-pi-4-model-b-header.jpg

Top ZDNet Reviews

Raspberry Pi 4

9
Motorola Moto G100
motorola-moto-g100-header.jpg

Top ZDNet Reviews

Motorola Moto G100

8
Raspberry Pi 400
raspberry-pi-400-header.jpg

Top ZDNet Reviews

Raspberry Pi 400

8.5
OnePlus Watch
oneplus-watch-3.jpg

Top ZDNet Reviews

OnePlus Watch

5.7

In our tests, the Aastra 9133i proved to be extremely difficult to set up and the Web configuration had to be repeated several times before the phone would accept the settings. We have not been able to explain why this happened, although another Aastra model, the 9112i proved just as temperamental, while dozens of other VoIP phones have been configured and operated with exactly the same equipment without any problems.

Given the setup problems we had and the rather dull looks of the Aastra 9133i, it’s hard to recommend this phone. However, it does offer a lot of functionality with support for up to ten VoIP accounts, POE (Power over Ethernet) support and a backlit, tilting, status display.

Related

Netgear Orbi Quad-Band Mesh WiFi 6E System (RBKE963): Fast but expensive wireless mesh networking
netgear-orbi-wifi-6e-rbke963-header.jpg

Netgear Orbi Quad-Band Mesh WiFi 6E System (RBKE963): Fast but expensive wireless mesh networking

Networking
NexDock 360 Touch review: Transform your Samsung smartphone into a capable laptop
nexdock-360-5.jpg

NexDock 360 Touch review: Transform your Samsung smartphone into a capable laptop

Mobility
Dell XPS 17 9710 (2021) review: A highly configurable premium 17-inch laptop
dell-xps-17-9710-header.jpg

Dell XPS 17 9710 (2021) review: A highly configurable premium 17-inch laptop

Laptops