Which Toshiba phone system do I have?

Check the label on the main cabinet or server: it will say Strata DK, CTX, CIX or IPedge along with a model number. Your phones are another clue: DKT sets point to DK, CTX or CIX; IP5000 and DP5000 sets point to CIX or IPedge.

When did Toshiba stop making phone systems?

Toshiba closed its Telecommunication Systems Division in 2017. Manufacturer support for the last phones ran into 2021; support since then comes from independent specialists.

Should I keep my Toshiba system or replace it?

If it is stable, parts are available and it does what you need, supporting it can be the cheapest option. If you need remote work, mobile apps, or you are paying for repairs every year, moving to a cloud system like smplVoice usually costs less over time.

Timeline & comparison

Toshiba Strata history & system comparison

From the 1978 Strata III to IPedge: where your system fits and what comes next.

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Overview

Where does your system fit?

Toshiba built business phone systems in the United States for almost four decades. Knowing where your system sits on that timeline tells you which phones it takes, which parts are still around, and how much life it realistically has left.

Toshiba's Telecommunication Systems Division closed in 2017, so there will be no new releases. The good news is that the platforms are mature and well understood. Use the timeline below to place your system, then decide whether to keep supporting it or plan a move to the cloud.

What we help with

Identify your platform from photos or a label
Support-or-replace cost comparison
Parts availability check for your system
Phased migration plans that keep phones running
Number porting and carrier coordination
Hybrid setups that keep existing Toshiba phones

Comparisons

Quick comparisons

DK424 vs DK424i: Same family; the DK424i is the later, enhanced model and was replaced by the CTX670
DK424i vs CTX670: The CTX670 is the direct successor, with more capacity and networking
CTX vs CIX: The CIX is IP-native (MEGACO+ and SIP); the CTX is primarily digital
CIX vs IPedge: The CIX is cabinet-based with IP support; IPedge is server-based and pure IP

Timeline

The Toshiba Strata timeline

1978
Strata III, one of the first electronic stored-program 'skinny wire' key systems.
1989
Strata DK: the DK56 and DK96 set the architecture for a digital family that grew to the DK424i.
2002
Strata CTX: the CTX100 and CTX670 replace the DK40i and DK424i.
2004
CTX28 replaces the DK14; SoftIPT, SpectraLink wireless and IP telephones arrive.
2005
Strata CIX: second-generation IP with MEGACO+ and SIP, scaling to the CIX1200.
2011
IPedge: pure-IP, Linux-based unified communications (EP, EC and EM servers).
2017
Toshiba's Telecommunication Systems Division closes; independent support continues.

Phones

Toshiba phones by generation

Toshiba 5000 Series17 modelsDP5000 digital and IP5000 IP telephones, Toshiba's last and most capable handset generation.Toshiba 3200 Series7 modelsSilver-framed DKT3200 digital telephones, a 2005 refresh of the 3000 series.Toshiba 3000 Series7 modelsDKT3000 digital telephones introduced with the Strata CTX in 2002.Toshiba 2000 Series15 modelsDKT2000 digital desk phones, cordless CT and DECT handsets, and IPT2000 IP phones.Toshiba 1000 Series1 modelsThe IPT1020-SD, one of Toshiba's first IP desk telephones.Toshiba 4000 Series1 modelsThe IP4100-DECT, a SIP DECT cordless system for the Strata CIX and IPedge.

Documentation

Comparison documents

Full manuals library

PDF
CTX670 vs DK424i vs DK424 Comparison
ComparisonDec 2001
PDF

Thinking about what comes after your Toshiba?

There is no single right answer. Some businesses keep a well-maintained Toshiba for years; others save money by moving now. We will lay out both options honestly.

Migration options

Other Toshiba systems

Strata DK Strata CTX Strata CIX IPedge Voicemail & messaging

FAQ

Toshiba Strata history & comparison FAQ

Straight answers from the technicians who support these systems every week.

Need help with your Toshiba phone system?

Certified technicians, former Toshiba staff among them, supporting Strata and IPedge systems since 1996. Remote or onsite, nationwide.

Get Toshiba support (800) 943-7675