SIP IP Expandable Cordless Phone System with Corded Handset Base Station and 1 Cordless Handset

  • One button Call Transfer
  • Busy Lamp Field (BLF)
  • Ethernet Pass-through port 


a phone system with service designed specifically for small businesses

  • A multi-line phone system sold with monthly service all provided by Panasonic that gives small businesses an affordable, easy to set-up phone communications solution. .
  • Phone hardware is expandable up to 3 direct lines serving up to 8 unique phone numbers (including a fax line option) depending upon your needs.
  • Base unit includes 1 corded and one cordless handset (KX-TPA50), expandable up to 6 cordless handsets which offers your employees even more workplace mobility and flexibility.
  • Available service features include Auto Attendant, Music on Hold and Mobile Phone Integration normally found only on more complex and expensive PBX systems.
  • Requires an existing broadband internet connection, a nearby electrical outlet, phone activation and monthly service subscription on
  • Panasonic eliminates the hassle of maintaining a phone system by offering a true end-to-end solution that Panasonic manages for you. No more phone service provider blaming the phone equipment provider and visa versa.
  • Compare us! When combined with monthly Panasonic Cloud Voice Service, the KX-TGP551 offers one of the lowest monthly costs of ownership meaning a great value for small businesses from the #1 choice in small business phone systems. 

SpecificationsExpand All

    • VoIP Support
    • IETF SIP version 2(RFC3261 ands companion RFCs)
    • BroadWorks R15 / BroadSoft
    • Asterisk
    • Voice Codec
    • G.711a-law / G.711μ-law / G.722(wideband) / G.729a / G.726(32K)
    • Network Interface
    • 10 / 100 base-T auto MDI / MDIX Ethernet LAN port
    • Provisioning
    • HTTP / HTTPS / FTP / TFTP and local / remote WEB configration
    • QoS Support
    • DSCP
    • Static VLAN
    • TOS
    • Keys and Indications
    • Menu driven user interface
    • Line Status
    • Direct handset call buttons
    • Message waiting indicator on the base unit
    • RF-System
    • US-DECT 1.92GHz - 1.93GHz (for USA and Canada)
    • EU-DECT 1.88GHz - 1.90GHz
    • Phone Features
    • Multiple Handset
    • Multiple registration support
    • Simultaneous voice calls
    • 2.5mm Headset Jack
    • Grouping Handset : Handset select for receiving call
    • Handset and Number select for making call
    • Redial
    • Do Not Disturb
    • Anonymous Call (CLIR)
    • Anonymous Call Rejection
    • Busy Lamp Field (BLF) for handsets
    • Calling party name and munber presentation (CLIP, CNIP)
    • Call Rejection
    • DTMF dialing during call
    • 3-Party Conferencing
    • Call Transfer
    • One touch button call Transfer
    • Call Hold
    • Call Forward Unconditional/User Busy/No Answer
    • Call Waiting
    • Distinctive Ringing
    • Ringtone Selection
    • UPC


KX-TGP551T04 is rated 5.0 out of 5 by 1.
Rated 5 out of 5 by from
Date published: 2012-01-05
  • y_2016, m_12, d_7, h_21
  • bvseo_bulk, prod_bvrr, vn_bulk_0.0
  • cp_1, bvpage1
  • co_hasreviews, tv_1, tr_0
  • loc_en_US, sid_KX-TGP551T04, prod, sort_[SortEntry(order=FEATURED, direction=DESCENDING), SortEntry(order=AGE, direction=DESCENDING)]
  • clientName_panasonic


Owner's Manuals
  • What support content is available for my product?

    Click on a link below that interests you the most:

    • Panasonic Community - Join our Community and participate in Discussions where you can learn more about our Products. You will also be able to get advice from other members and Product Experts, as well as documents, FAQ’s, tutorials, and updates.

    • Live Chat - Chat with a representative from 9am-9pm Monday-Friday and 10am-7pm Saturday/Sunday EST.

    • Email Contact - For email inquiries, send them to, you will receive a response within 24-48 hours.

    • Parts/Accessories - Order parts and/or accessories from our supply chain, Encompass.

    • Service Locator - Locate the closest Authorized repair center to you for TVs, Microwaves, Vacuums, or Massage Chairs.

    • Service Request - If you need a product repaired and is NOT a TV, Microwave, Vacuum, or Massage Chair, you can use our Online Repair Request. There, you will be able to get a repair estimate, pay online, and track the repair status.
Consumer Product Support and Technical Assistance
Operating hours:
Mon-Fri 9am-9pm EST
Sat-Sun 10am-7pm EST
Panasonic USA