Cisco CP-PWR-CUBE Power Transformer

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Cisco Power Transformer for 7900 Series IP Phones
The Cisco CP-PWR-CUBE power transformer is an essential accessory for any of the Cisco 7900 series IP phones. The power cubes are used when in-line power over the Ethernet is unavailable. Cisco does not bundle its power supplies with their phones because a large number of their IP phones are powered using the Ethernet over the Ethernet cable using PoE. Your basic Cisco phone power transformer supplies AC power using electricity, just as with most other back-up power sources.

Since the beginning of production of the Cisco 7900 series IP phones, there have been innovations to the technology involved, and in turn this meant that the AC power transformers were continually upgraded to keep pace with the quality of the phones produced. The original Cisco CP-PWR-CUBE was introduced with the first phones in the series and was considered first generation. After November 2004, the second generation power cube was released because of the introduction of the Cisco 7970G IP phone. But the CP-PWR-CUBE-2 was compatible with most of the 7900 series with just a few exceptions.

Since that time, Cisco, always the worldwide leader in VOIP telephony, has continued to upgrade their products. With the recent introduction of the 7941G, 7961G and 7971G phones, they have also introduced the third generation power transformer, the CP-PWR-CUBE-3. This transformer is also compatible with most 7900 series phones, including most color-screen phones. The exception includes the wireless versions of the CP-792X and some of the older conference phones, like the CP-7935/36 phones.

It’s important to remember that when upgrading to a newer CP-PWR-CUBE, to check and make sure your IP phone will be compatible with the newer model. There are exceptions, and it will save you time and money. Remember too that a refurbished Cisco 7900 series power transformer is a great way to upgrade while saving your business money.

  • Compatibility Information
    • Cisco IP Phone 7902G, 7905G, 7910G, 7910G+SW, 7920, 7940G, 7960G, 7970G ¦ Cisco IP Telephone 30 VIP, 7900
  • MainSpecs
    • Cisco power adapter
    • IP Phone 7902G, 7905G, 7910G, 7910G+SW, 7920, 7940G, 7960G, 7970G; IP Telephone 30 VIP, 7900
    • 48 V
    • Power adapter
  • Power Device
    • 48 V
  • General
    • Power adapter


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