Grandstream GXP2135 Enterprise HD IP Phone

The Grandstream GXP2135 takes the GXP2130's colour display and Bluetooth and roughly triples the key capacity. Eight dual-colour line keys carry four SIP accounts, and those keys can be programmed digitally as thirty-two customisable BLF or fast-dial positions — enough for a team leader or small switchboard to work from without an expansion module.

It is the sweet spot of the GXP21xx family for most busy users: substantial presence monitoring, 4-way conferencing, Gigabit ports with integrated PoE and a maximum draw of only 6.4W. Bluetooth handles mobile contact syncing and wireless headsets, and the whole thing provisions in bulk over TR-069 or AES-encrypted XML like the rest of the range.

Ideal for

• Team leaders and supervisors monitoring a department
• Small reception and switchboard positions
• Sales floors where staff transfer calls constantly
• Practice and clinic administrators
• Users who want mobile contacts synced to the desk phone
• Sites extending an existing GXP21xx estate

Key features

• Eight dual-colour line keys with 4 SIP accounts — substantial line capacity on a standard-size phone
• 32 digitally programmable BLF or fast-dial keys — cover a whole department without an expansion module
• 2.8-inch 320 × 240 colour TFT — clear caller detail and key labelling
• Integrated Bluetooth — sync mobile contacts or pair a wireless headset
• Dual Gigabit Ethernet with integrated PoE — one cable, full PC speed
• 4-way audio conferencing — small meetings run from the handset
• Low 6.4W maximum draw — easy on a PoE switch budget
• Wideband HD audio — G.722 and Opus for clearer conversations
• RJ9 headset jack with EHS — Plantronics electronic hook switch support
• 256-bit AES, SRTP, TLS and 802.1x — secure configuration and media

Technical specification

Telephony

• 4 SIP accounts across 8 lines and 8 line keys
• 32 digitally programmable and customisable BLF or fast-dial keys
• 4-way audio conferencing
• Codecs: G.711µ/a-law, G.722 (wideband), G.723.1, G.726, G.729A/B, iLBC, Opus
• In-band and out-of-band DTMF

Display and keys

• 2.8-inch 320 × 240 TFT colour LCD
• 8 dual-colour line keys

Network and wireless

• Dual switched auto-sensing 10/100/1000 Mbps Gigabit Ethernet ports with integrated PoE
• Built-in Bluetooth for mobile syncing and compatible headsets

Audio and headset

• HD handset and speakerphone with wideband audio
• RJ9 headset jack with EHS for Plantronics headsets

Power and physical

• Universal adapter: 100–240V input, +12V 0.5A output, or PoE
• Maximum power consumption: 6.4W
• Dimensions: 201mm wide × 193mm long × 85mm high
• Unit weight: 0.85kg

Security and provisioning

• 256-bit AES encrypted configuration file, SRTP, TLS, 802.1x
• Firmware upgrade via TFTP, HTTP or HTTPS
• Mass provisioning via TR-069 or AES-encrypted XML configuration file

Datasheet

Download the official Grandstream GXP2135 datasheet (PDF)

Works with