Grandstream Networks DP750 User manual

Grandstream Networks, Inc.
DP750/DP720
User Guide

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DP750/DP720 User Guide
COPYRIGHT
©2016 Grandstream Networks, Inc. http://www.grandstream.com
All rights reserved. Information in this document is subject to change without notice. Reproduction or
transmittal of the entire or any part, in any form or by any means, electronic or print, for any purpose
without the express written permission of Grandstream Networks, Inc. is not permitted.
The latest electronic version of this user manual is available for download here:
http://www.grandstream.com/support
Grandstream is a registered trademark and Grandstream logo is trademark of Grandstream Networks, Inc.
in the United States, Europe and other countries.
CAUTION
Changes or modifications to this product not expressly approved by Grandstream, or operation of this
product in any way other than as detailed by this User Manual, could void your manufacturer warranty.
WARNING
Please do not use a different power adaptor with your devices as it may cause damage to the products and
void the manufacturer warranty.

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DP750/DP720 User Guide
GNU GPL INFORMATION
DP750 firmware contains third-party software licensed under the GNU General Public License (GPL).
Grandstream uses software under the specific terms of the GPL. Please see the GNU General Public
License (GPL) for the exact terms and conditions of the license.
Grandstream GNU GPL related source code can be downloaded from Grandstream web site from:
http://www.grandstream.com/sites/default/files/Resources/gpl_dp750.tar.gz

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DP750/DP720 User Guide
Table of Content
DOCUMENT PURPOSE.................................................................................................7
CHANGE LOG................................................................................................................8
FIRMWARE VERSION 1.0.0.14............................................................................................................8
GUI INTERFACE EXAMPLES........................................................................................9
WELCOME ...................................................................................................................10
PRODUCT OVERVIEW ................................................................................................ 11
Feature Highlights................................................................................................................................ 11
DP750 Technical Specifications...........................................................................................................12
DP720 Technical Specifications...........................................................................................................13
GETTING STARTED.....................................................................................................15
Equipment Packaging..........................................................................................................................15
Connecting DP750...............................................................................................................................16
Connecting via AC power .............................................................................................................16
Connecting via PoE......................................................................................................................16
Setting up DP720 handset...................................................................................................................17
Battery Information .......................................................................................................................17
Setting up the Charger Station ............................................................................................................18
DP750 LED Patterns............................................................................................................................18
DP720 Handset Description ................................................................................................................19
DP720 Icons Description .....................................................................................................................20
DP720 Handset Menu..........................................................................................................................22
BASIC OPERATIONS...................................................................................................25
Turning the Handset ON / OFF............................................................................................................25
Register DP720 Handset to DP750 Base Station ...............................................................................25
Unregister the DP720 ..........................................................................................................................26
Checking DP750 Base Station IPAddress..........................................................................................27
Setting the Key Lock............................................................................................................................27
Locating a DP720 Handset from DP750 Base station.........................................................................28
Locate Via DP750 Web UI............................................................................................................28
Locate Via DP750 Base Station ...................................................................................................29
Understanding DP720/750 Voice Prompt............................................................................................29
Checking System Status......................................................................................................................31
Basic Network Settings........................................................................................................................31
Register a SIP Account........................................................................................................................32
Register Account via Web User Interface.....................................................................................32

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DP750/DP720 User Guide
Return to Idle Screen...........................................................................................................................35
PHONE SETTINGS.......................................................................................................36
Editing the Handset’s name.................................................................................................................36
Changing the Base PIN .......................................................................................................................36
Selecting the Menu Language.............................................................................................................37
Activate/Deactivate Hands-Free Mode................................................................................................38
Muting the Microphone ........................................................................................................................38
Adjusting Speaker and Earpiece Volume ............................................................................................38
Ringtones.............................................................................................................................................39
Setting the Ringer Volume on the Handset ..................................................................................39
Setting the Ringer Melody on the Handset...................................................................................39
Advisory Tones .............................................................................................................................40
Date and Time......................................................................................................................................41
Factory Functions ................................................................................................................................42
Firmware Upgrade ...............................................................................................................................43
Reset the Handset DP720...................................................................................................................43
CALL OPERATIONS ....................................................................................................45
Placing calls.........................................................................................................................................45
Internal calls..................................................................................................................................45
External Calls................................................................................................................................45
Dialing from Call history.......................................................................................................................46
Answering Calls ...................................................................................................................................46
Auto Answer.........................................................................................................................................47
Direct IP Call........................................................................................................................................47
Call Hold/Resume................................................................................................................................48
Call waiting...........................................................................................................................................48
Do Not Disturb .....................................................................................................................................49
Call forward..........................................................................................................................................49
Call transfer..........................................................................................................................................50
Blind transfer.................................................................................................................................50
Attended Transfer .........................................................................................................................50
Speed Dial ...........................................................................................................................................50
3-Way Conference...............................................................................................................................51
Voice Mail.............................................................................................................................................51
Set Voice mail feature code..........................................................................................................51
Play voice mail messages ............................................................................................................51
Call Features........................................................................................................................................52
RESTORE FACTORY DEFAULT SETTINGS...............................................................54
EXPERIENCING DP750/DP720 ...................................................................................55

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DP750/DP720 User Guide
Table of Tables
Table 1: DP720 Features in a Glance......................................................................................................... 11
Table 2: DP750 Features in a Glance......................................................................................................... 11
Table 3: DP750 Technical Specifications ....................................................................................................12
Table 4: DP750 Technical Specifications ....................................................................................................13
Table 5: Equipment Packaging ...................................................................................................................15
Table 6: DP750 Led Patterns......................................................................................................................18
Table 7: Handset Keys Description.............................................................................................................19
Table 8: DP720 Icons Descriptions.............................................................................................................20
Table 9: Voice Prompt Menu.......................................................................................................................29
Table 10: DP720 Info description................................................................................................................31
Table 11: Call Features ...............................................................................................................................52

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DP750/DP720 User Guide
Table of Figures
Figure 1: DP720 Package Contents ...........................................................................................................15
Figure 2: DP750 Package Contents ...........................................................................................................15
Figure 3: DP750 Back View........................................................................................................................16
Figure 4: Connecting the Base station........................................................................................................16
Figure 5: Setting up the DP720...................................................................................................................17
Figure 6: Setting up the charger station......................................................................................................18
Figure 7: Handset Keys Description ...........................................................................................................19
Figure 8: DP720 Menu Structure ................................................................................................................22
Figure 9: DECT Status................................................................................................................................25
Figure 10: Registration process..................................................................................................................26
Figure 11 : Locate Handset via Web UI ......................................................................................................28
Figure 12 : Network Settings configuration.................................................................................................32
Figure 13: SIP Settings ...............................................................................................................................33
Figure 14: SIP Accounts Settings................................................................................................................34
Figure 15 : SIP Accounts Status .................................................................................................................34
Figure 16: Handset Name editing ...............................................................................................................36
Figure 17: Changing Admin Base PIN Code...............................................................................................37
Figure 18: Handset Language ....................................................................................................................38
Figure 19: Ringer Volume ...........................................................................................................................39
Figure 20: Internal/External Calls Ringtones ..............................................................................................40
Figure 21: Advisory Tone.............................................................................................................................41
Figure 22: Date and Time Settings .............................................................................................................41
Figure 23: Factory Functions ......................................................................................................................42
Figure 24: Firmware Upgrade.....................................................................................................................43
Figure 25: Factory Reset.............................................................................................................................44

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DP750/DP720 User Guide
DOCUMENT PURPOSE
This document describes the basic concept and tasks necessary to use and configure your DP720 via the
LCD menu and also using the DP750 base station. And it covers the topic of phone installation, making
basic calls and connecting phone to devices.Please visit http://www.grandstream.com/support to download
the latest “DP750/DP720 User Guide”.
This guide covers following topics:
Product Overview
Getting Started
Basic Operations
Phone settings
Call Operations

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DP750/DP720 User Guide
CHANGE LOG
This section documents significant changes from previous versions of user guide for DP750/DP720. Only
major new features or major document updates are listed here. Minor updates for corrections or editing are
not documented here.
FIRMWARE VERSION 1.0.0.14
This is the initial version for DP750/DP720.

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DP750/DP720 User Guide
GUI INTERFACE EXAMPLES
http://www.grandstream.com/sites/default/files/Resources/dp750_web_gui.zip
1. Screenshot of Login Page
2. Screenshots of Status Pages
3. Screenshots of Profiles Pages
4. Screenshots of DECT Pages
5. Screenshots of Phonebook Pages
6. Screenshots of Settings Pages
7. Screenshots of Maintenance Pages

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DP750/DP720 User Guide
WELCOME
Thank you for purchasing Grandstream DP720 DECT IP Phone, the DP720 is the next generation of
versatile, affordable, high quality and easy-to-use, high quality DECT cordless IP phones for small
BUSINESS and residential users. These compact and durable DECT IP phones allow users mobility
throughout their home or office while maintaining the benefits of VoIP calling with a reliable and convenient
wireless voice communications. Moreover, it provides many widely accepted benefits of the DECT
standard, including compact size, superb HD audio quality, rich feature set, market leading
price-performance and wide range radio coverage which allow users to enjoy the benefits of mobility for a
minimum investment

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DP750/DP720 User Guide
PRODUCT OVERVIEW
FeatureHighlights
The following tables contains the major features of the DP720 / DP750
Table 1:DP720 Features in a Glance
Table 2: DP750 Features in a Glance
DP720
DECT Cordless HD.
1.8 inch (128x160) TFT color LCD.
250 hours standby /20 hours talk time.
27 languages embedded.
10 accounts.
10 lines.
5 Type of ring modes.
DP750
5 handsets.
10 accounts.
10 Lines.
4 Concurrent calls.
PoE power support.
300m range outdoor / 50m range indoor.

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DP750/DP720 User Guide
DP750 Technical Specifications
The following table resume all the technical specifications including the protocols / standards supported,
voice codecs, telephony features, languages and Upgrade/ Provisioning settings for the Base station
DP750.
Table 3: DP750 Technical Specifications
Air Interface
Telephony standards: DECT
Frequency bands:
1880 –1900 MHz (Europe), 1920 –1930 MHz (US),
1910 –1920 MHz (Brazil), 1786 –1792 MHz (Korea),
1893 –1906 MHz (Japan), 1880 –1895 MHz (Taiwan)
Number of channels: 10 (Europe), 5 (US, Brazil or Japan), 3 (Korea) or 8 (Taiwan)
Range: up to 300 meters outdoor and 50 meters indoor
Peripherals
5 LED indicators: Power, Network, Register, Call, DECT
Reset button, Pairing/Paging button
One 10/100 Mbps auto-sensing Ethernet port with integrated PoE
Protocol/Standards
SIP RFC3261, TCP/IP/UDP, RTP/RTCP, HTTP/HTTPS, ARP/RARP, ICMP, DNS (A record,
SRV, NAPTR), DHCP, PPPoE, SSH, TFTP, NTP, STUN, SIMPLE, LLDP-MED, LDAP,
TR-069, 802.1x, TLS, SRTP, IPv6 (pending)
Voice Codecs
G.711µ/a-law, G.723.1, G.729A/B, G.726-32, iLBC, G.722, OPUS, G.722.2/AMR-WB (special
order), in-band and out-of-band DTMF (in audio, RFC2833, SIP INFO), VAD, CNG, PLC, AJB
Telephony Features
Hold, transfer, forward, 3-way conference, call park, call pickup, downloadable phonebook
(XML, LDAP, up to 3000 entries), call waiting, call log (up to 300 records), auto answer,
click-to-dial, flexible dial plan, music on hold, server redundancy and fail-over
Voice Codec
G.711µ/a-law, G.723.1, G.729A/B, G.726-32, iLBC, G.722, Opus, G.722.2/AMR-WB (special
order), in-band and out-of-band DTMF (in audio, RFC2833, SIP INFO), VAD, CNG, PLC, AJB
Sample Applications
Weather, Currency (pending)
QoS
Layer 2 QoS (802.1Q, 802.1P) and Layer 3 QoS (ToS, DiffServ, MPLS)
Security
User and administrator level access control, MD5 and MD5-sess based authentication,
256-bit AES encrypted configuration file, TLS, SRTP, HTTPS, 802.1x media access control,
DECT authentication & encryption
Multi-language
Arabic, Chinese Simple, Chinese Tradition, Croatian, Czech, Danish, Dutch, English,
Estonian, Finnish, French, German, Greek, Hebrew, Hungarian, Italian, Japanese, Korean,
Norwegian, Polish, Portuguese, Romanian, Russian, Slovenian, Spanish, Swedish, Turkish
Upgrade/
Provisioning
Firmware upgrade via TFTP/HTTP/HTTPS, mass provisioning using TR-069 or AES
encrypted XML configuration file
Multiple SIP
Accounts
Up to ten (10) distinct SIP accounts per system
Each handset may map to any SIP account(s)
Each SIP account may map to any handset(s)

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DP750/DP720 User Guide
Ring Group
Flexible options when multiple handsets share the same SIP account
Circular Mode: all phones ring sequentially from the phone next to the one that
answered last
Linear Mode: all phones ring sequentially in the predestinated order
Parallel Mode: all phones ring concurrently and after one phone answers, the
remaining available phones can make new calls
Shared Mode: all phones ring concurrently and always share the same line similar
to analog phones
Power and Green
Energy Efficiency
Universal Power Supply Input AC 100-240V 50-60Hz; Output 5VDC, 1A; Micro-USB
connection;
PoE: IEEE802.3af Class 1, 0.44W–3.84W
Package Content
Base unit, Universal Power Supply, Ethernet cable, Quick Start Guide
Dimensions
28.5 mm (H) x 130 mm (W) x 90 mm (D)
Weight
Base unit: 143g, Universal Power Supply: 50g; Package: 360g
Temperature
and Humidity
Operation: -10ºto 50ºC (14 to 122ºF); Storage: -20ºto 60ºC (-4 to 140ºF);
Humidity: 10% to 90% non-condensing
Compliance
FCC: Part 15D, 47 CFR 2.1093, Part 15B
CE: EN60950; EN301489-1-6; EN301406
RCM: AS/NZS60950 (Pending)
DP720 Technical Specifications
The following tables resume all the technical specifications including the protocols / standards supported,
voice codecs, telephony features, languages and Upgrade/ Provisioning settings for the DP 720 handset.
Table 4: DP750 Technical Specifications
Air Interface
Telephony standards: DECT
Frequency bands:
1880 –1900 MHz (Europe), 1920 –1930 MHz (US),
1910 –1920 MHz (Brazil), 1786 –1792 MHz (Korea),
1893 –1906 MHz (Japan), 1880 –1895 MHz (Taiwan)
Number of channels: 10 (Europe), 5 (US, Brazil or Japan), 3 (Korea), 8 (Taiwan)
Range: up to 300 meters outdoor and 50 meters indoor
Peripherals
1.8 inch (128x160) color TFT LCD
23 keys including 2 soft keys, 5 navigation/ menu keys, 4 dedicated function keys for SEND,
POWER/END, SPEAKERPHONE, MUTE
3-color MWI LED
3.5mm headset jack
Removable belt clip
Micro-USB port for alternative charging and non-battery operation

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DP750/DP720 User Guide
Protocol/Standards
DECT, Hearing Aid Compatibility (HAC) compliant
Voice Codecs
G.722 codec for HD audio and G.726 codec for narrow band audio, AEC, AGC, Ambient
noise reduction
Telephony Features
Hold, transfer, forward, 3-way conference, call park, call pickup, downloadable phonebook,
call waiting, call log, auto answer, click-to-dial, flexible dial plan, music on hold
Sample Applications
Weather, Currency (pending)
HD Audio
Yes, both on Handset and Speakerphone
Security
DECT authentication & encryption
Multi-language
Arabic, Chinese Simple, Chinese Tradition, Croatian, Czech, Danish, Dutch, English,
Estonian, Finnish, French, German, Greek, Hebrew, Hungarian, Italian, Japanese, Korean,
Norwegian, Polish, Portuguese, Romanian, Russian, Slovenian, Spanish, Swedish, Turkish
Upgrade/
Provisioning
Software Upgrade Over-The-Air (SUOTA), handset provisioning Over-The-Air
Multiple Line
Access
Each handset may access up to 10 lines
Power and Green
Energy Efficiency
Universal Power Supply Input AC 100-240V 50/60Hz; Output 5VDC, 1A; Micro-USB
connection;
Rechargeable 800mAh Ni-MH Low Self-Discharge (LSD) AAAbatteries;
250 hours of standby time and 20 hours of talk time
Package Content
Handset unit, universal power supply, charger cradle, belt clip, 2 batteries, Quick Start Guide
Dimensions
(H x W x D)
Handset: 155 x 50 x 26 mm, Charger Cradle: 35 x 63.5 x 54 mm
Weight
Handset: 130g, charger cradle: 71g, universal power supply: 50g; Package: 352g
Temperature
and Humidity
Operation: -10ºto 50ºC (14 to 122ºF); Charging: 0 to 45ºC (32 to 113ºF); Storage: -20ºto
60ºC (-4 to 140ºF);
Humidity: 10% to 90% non-condensing
Compliance
FCC: Part 15D, 47 CFR 2.1093, Part 15B
CE: EN60950; EN301489-1-6; EN301406
RCM: AS/NZS60950 (Pending)

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DP750/DP720 User Guide
GETTING STARTED
This chapter provides basic installation instructions including the list of the packaging contents and also
information for obtaining the best performance with the DP720 IP DECT phone and its Base station
DP750.
Equipment Packaging
Table 5: Equipment Packaging
Figure 1: DP720 Package Contents
Note:Check the package before installation. If you find anything missing, contact your system administrator.
DP720
DP750
1 Handset unit
1 Universal power supply 5V
1 Charger cradle
1 Belt clip
2 chargeable batteries
1 Quick Start Guide
1 Base unit
1 Universal power supply 5V
1 Ethernet cable
1 Quick Start Guide
1 GPL Statement
Figure 2: DP750 Package Contents

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DP750/DP720 User Guide
Connecting DP750
To setup the DP750 Base Station, please follow the steps below:
Figure 3: DP750 Back View
You have two options for power and network connection of the base station: AC power or Power over
Ethernet (PoE)
Connecting via AC power
1. Connect the microUSB connector into the related port on the base station and connect the other
end of the power adapter into an electrical power outlet.
2. Connect the supplied Ethernet cable between the Internet port on the base station and the Internet
port in your network or the switch/hub device port.
Connecting via PoE
To connect the base station using the pose, you need to connect the Ethernet cable provided (or 3rd party
network cable) between the Network Socket on the base station to Ethernet port of the POE switch/hub.
Figure 4: Connecting the Base station

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DP750/DP720 User Guide
Setting up DP720handset
Please follow the above steps to insert batteries into the handset:
1. Open the battery compartment cover.
2. Insert the batteries in the correct polarity.
3. Close the battery compartment cover.
Please charge the batteries fully before using the handset for the first time
Figure 5: Setting up the DP720
BatteryInformation
Technology: Nickel Metal Hydride (Ni-MH)
Size: AAA
Voltage: 1.2V
Capacity: 800mAh
Charging time: 12 hours from empty to full
Standby time: up to 250 hours
Talk time: up to 20 hours active talk time
In order to get the best performance of your DP720 handset, we recommend using original batteries
provided in the package or batteries compliant with above specifications.
Above specifications may differ depending on the age and capacity of the batteries used.
Important Note: Be careful when setting up the batteries into your handset to avoid any risk of
short-circuits that can lead to damage your batteries and/or the handset itself. Do not use damaged battery
which can increase the risk of serious harm.

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DP750/DP720 User Guide
Setting up the Charger Station
Please refer to the following steps for setting up the Charger station and charging the handset:
1. Connect the DC plug on the power adapter to the microUSB connector on the charge station.
2. Connect the other end of the power adapter into an electrical power outlet.
3. After setting up the handset and charger station, place the handset in the charger station.
Figure 6: Setting up the charger station
DP750 LED Patterns
The DP750 has 5 LED lights on it. Please see on the following table the meaning of each light.
Table 6: DP750 Led Patterns
LED Light
Status
Indicates Power ON/OFF
Indicates Access to the Network. Remains ON while there is Access to the Network
Indicates if a SIP account is registered
Indicates status of the lines.
Blinking: A line is in use. Solid ON: All lines are free.
The Radio icon for pairing the DP720 and DP750, if we keep pressing the Radio
button it starts blinking indicating pairing attempt.

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DP750/DP720 User Guide
DP720 Handset Description
The LCD screen and the Keypad are the main hardware components of the DP720.
Figure 7: Handset Keys Description
Table 7: Handset Keys Description
Key
Description
1.
Power and charging
indication
Red: In charge / Green: Charge completed.
2.
Earphone
Correspond to Audio output
3,5
Left and Right softkey
Correspond to functions displayed on the LCD. These functions
change depending on the current context.
4.
LCD Display
Shows call information, handset status icons, prompt messages and
etc.
6.
4 Arrow key combination
Permits navigation of the cursor through the displayed menu options
7.
Ok / Selection key
Selects the option chosen by the cursor. (Enters the main menu from
the home screen.
8.
Off-hook or dial key
Power Key: Turn on / Off the handset - On-hook: Terminate calls.
9.
On-hook or Power key
Off-hook key and Dial key to make outgoing calls
10.
Alphanumeric Keypad
Provides the digits, letters, and special characters in context-sensitive