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

Model number: KX-TGP551T04

  • One button Call Transfer
  • Busy Lamp Field (BLF)
  • Ethernet Pass-through port 
VoIP Support
IETF SIP version 2(RFC3261 ands companion RFCs) Yes
BroadWorks R15 / BroadSoft Yes
Asterisk Yes (Business Edition C.x, Switch Vox Ver.4.0-4.5)
Voice Codec
G.711a-law / G.711μ-law / G.722(wideband) / G.729a / G.726(32K) Yes
Network Interface
10 / 100 base-T auto MDI / MDIX Ethernet LAN port 2
HTTP / HTTPS / FTP / TFTP and local / remote WEB configration Yes
QoS Support
Static VLAN No
Keys and Indications
Menu driven user interface Yes
Line Status No
Direct handset call buttons Yes
Message waiting indicator on the base unit No
US-DECT 1.92GHz - 1.93GHz (for USA and Canada) Yes
EU-DECT 1.88GHz - 1.90GHz Yes
Phone Features
Multiple Handset 6
Multiple registration support 8
Simultaneous voice calls 3
2.5mm Headset Jack Yes (KX-TGP551 : on base unit and on cordless handset.)
Grouping Handset : Handset select for receiving call Yes
Handset and Number select for making call Yes
Redial Yes
Do Not Disturb Yes
Anonymous Call (CLIR) Yes
Anonymous Call Rejection Yes
Busy Lamp Field (BLF) for handsets No
Calling party name and munber presentation (CLIP, CNIP) Yes
Call Rejection Yes
DTMF dialing during call Yes
3-Party Conferencing Yes
Call Transfer Yes
One touch button call Transfer No
Call Hold Yes
Call Forward Unconditional/User Busy/No Answer Yes
Call Waiting Yes
Distinctive Ringing Yes
Ringtone Selection Yes


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