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IP Phones and Terminals / Grandstream

GXP1620

The GXP1620 is a basic/business IP phone designed for small to medium-sized offices that need a simple, reliable device with HD voice quality. It supports two SIP lines, has a backlit LCD screen, and offers essential VoIP telephony features—ideal for environments with moderate call volume.

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GXP1620

Main features

  • 2 lines / 2 SIP accounts
  • Display: Backlit graphic LCD 132 × 48 pixels
  • HD audio in handset and speakerphone
  • Full-duplex hands-free with echo cancellation
  • Programmable soft keys (3 XML context keys)
  • Telephony functions: call waiting, call transfer, call forwarding, call hold, call waiting, contact list, call history, hot-desking/shared-call appearance, etc.
  • Supported codecs: G.711µ/a, G.722 (wideband), G.729A/B, G.726, G.723, iLBC; DTMF RFC2833 or SIP-INFO; support for VAD, CNG, AEC, PLC, AGC, etc.
  • Security: SIP/TLS, SRTP, AES-256, 802.1x support for network access control.
  • Provisioning / Management: HTTP/HTTPS, TFTP, TR-069, encrypted XML files.

Technical specifications

SIP lines

2 lines / 2 SIP accounts

Screen

LCD 132×48 px (backlit)

Audio

HD (headphone & speaker, full-duplex)

Soft keys

3 programmable XML keys

Conference

3-way

Codecs

G.711, G.722, G.729A/B, G.726, G.723, iLBC, DTMF

BLF / Speed ​​Dial

— (it does not have dedicated BLF keys)

Network ports

2×10/100 Mbps (no Gigabit)

PoE

No (basic model)

Security / Encryption

SIP/TLS, SRTP, AES-256, 802.1x

Provisioning

HTTP, HTTPS, TFTP, TR-069, Encrypted XML

About the brand

The GXP1620 belongs to Grandstream’s basic series (16xx series), designed for small to medium-sized businesses that require essential VoIP features with good voice quality at an affordable cost — ideal as an entry point to corporate VoIP without excessive features.

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