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.................................................................................................8
CHANGE LOG................................................................................................................9
Firmware Version 1.0.1.14.....................................................................................................................9
Firmware Version 1.0.1.4.......................................................................................................................9
Firmware Version 1.0.0.16...................................................................................................................10
GUI INTERFACE EXAMPLES...................................................................................... 11
WELCOME ...................................................................................................................12
PRODUCT OVERVIEW ................................................................................................13
Feature Highlights................................................................................................................................13
DP750 Technical Specifications...........................................................................................................14
DP720 Technical Specifications...........................................................................................................15
GETTING STARTED.....................................................................................................17
Equipment Packaging..........................................................................................................................17
Connecting DP750...............................................................................................................................18
Connecting via AC power.............................................................................................................18
Connecting via PoE......................................................................................................................18
Setting up DP720 handset...................................................................................................................19
Battery Information .......................................................................................................................19
Setting up the Charge Station..............................................................................................................20
DP750 LED Patterns............................................................................................................................20
DP720 Handset Description ................................................................................................................21
DP720 Icons Description .....................................................................................................................22
DP720 Handset Menu..........................................................................................................................25
BASIC OPERATIONS...................................................................................................28
Turning the Handset ON / OFF............................................................................................................28
Register DP720 Handset to DP750 Base Station ...............................................................................28
Using DP720 with multiple DP750 base stations ................................................................................29
Registering DP720 to an additional DP750 base station .............................................................29
Switching between different base stations ...................................................................................30
Unregister the DP720 ..........................................................................................................................31
Obtain DP750 Base Station IPAddress via paired DP720..................................................................31
Setting the Key Lock............................................................................................................................32
Locating a DP720 Handset from DP750 Base station.........................................................................32
Locate via DP750 Web UI ............................................................................................................32
Locate via DP750 Base station ....................................................................................................33

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DP750/DP720 User Guide
Checking System Status......................................................................................................................33
Basic Network Settings........................................................................................................................34
Register a SIP Account........................................................................................................................35
Register account via web user interface ......................................................................................35
Return to Idle Screen...........................................................................................................................37
PHONE SETTINGS.......................................................................................................38
Editing the Handset’s name.................................................................................................................38
Changing the Base PIN Code..............................................................................................................38
Selecting the Menu Language.............................................................................................................39
Activate/Deactivate Hands-Free Mode................................................................................................40
Muting the Microphone ........................................................................................................................40
Adjusting Speaker and Earpiece Volume ............................................................................................40
Ringtones.............................................................................................................................................41
Setting the Ringer Volume on the Handset ..................................................................................41
Setting the Ringer Melody on the Handset...................................................................................41
Advisory Tones .............................................................................................................................42
Date and Time......................................................................................................................................43
Outgoing Default Line..........................................................................................................................44
Factory Functions ................................................................................................................................44
Firmware Upgrade ...............................................................................................................................45
Reset the DP720 Handset...................................................................................................................46
CALL OPERATIONS ....................................................................................................47
Placing calls.........................................................................................................................................47
Make a call using a line........................................................................................................................47
Dialing from Call history.......................................................................................................................48
Answering Calls ...................................................................................................................................48
Auto Answer.........................................................................................................................................49
Direct IP Call........................................................................................................................................49
Call Hold/Resume................................................................................................................................50
Call Waiting..........................................................................................................................................50
Do Not Disturb .....................................................................................................................................50
Call forward..........................................................................................................................................51
Call transfer..........................................................................................................................................51
Blind transfer.................................................................................................................................52
Attended Transfer .........................................................................................................................52
Speed Dial ...........................................................................................................................................52
3-Way Conference...............................................................................................................................52
Voice Mail.............................................................................................................................................53
Set Voice mail feature code..........................................................................................................53
Play voice mail messages ............................................................................................................53

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DP750/DP720 User Guide
Call Features........................................................................................................................................53
RESTORE FACTORY DEFAULT SETTINGS...............................................................56
EXPERIENCING DP750/DP720 ...................................................................................57

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DP750/DP720 User Guide
Table of Tables
Table 1: DP750 Features in a Glance.........................................................................................................13
Table 2: DP720 Features in a Glance.........................................................................................................13
Table 3: DP750 Technical Specifications....................................................................................................14
Table 4: DP720 Technical Specifications....................................................................................................15
Table 5: Equipment Packaging ...................................................................................................................17
Table 6: DP750 Led Patterns......................................................................................................................20
Table 7: Handset Keys Description.............................................................................................................21
Table 8: DP720 Icons Descriptions.............................................................................................................22
Table 9: DP720 Info description..................................................................................................................33
Table 10: Call Features ...............................................................................................................................53

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DP750/DP720 User Guide
Table of Figures
Figure 1: DP720 Package Contents ...........................................................................................................17
Figure 2: DP750 Package Contents ...........................................................................................................17
Figure 3: DP750 Back View........................................................................................................................18
Figure 4: Connecting the Base station........................................................................................................18
Figure 5: Setting up the DP720...................................................................................................................19
Figure 6: Setting up the charger station......................................................................................................20
Figure 7: Handset Keys Description ...........................................................................................................21
Figure 8: DP720 Menu Structure ................................................................................................................25
Figure 9: DECT Status................................................................................................................................28
Figure 10: Registration process..................................................................................................................29
Figure 11: Multiple Base Stations Registration ...........................................................................................30
Figure 12: Switching Between Base Stations .............................................................................................30
Figure 13: Locate Handset via Web UI.......................................................................................................33
Figure 14: Network Settings configuration..................................................................................................34
Figure 15: SIP Settings ...............................................................................................................................35
Figure 16: Sip Accounts Settings................................................................................................................36
Figure 17: Account Status...........................................................................................................................37
Figure 18: Handset Name editing ...............................................................................................................38
Figure 19: Changing Admin Base PIN Code...............................................................................................39
Figure 20: Handset Language ....................................................................................................................40
Figure 21: Ringer Volume ...........................................................................................................................41
Figure 22: Calls Ringtones..........................................................................................................................42
Figure 23: Advisory Tone.............................................................................................................................43
Figure 24: Date and Time Settings .............................................................................................................43
Figure 25: Factory Functions ......................................................................................................................45
Figure 26: New firmware available notification ...........................................................................................45
Figure 27: Firmware Upgrade.....................................................................................................................45
Figure 28: Factory Reset.............................................................................................................................46

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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 handset installation, basic operations
and call features. 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 1.0.1.14
Added Plus button “+” support for keypad dialing.
Added snooze time settings for alarm function.
Added snooze icon.
Updated alarm icon.
Removed IVR (Interactive Voice Response).
Added contact name to delete confirmation.
Added use Line from Contacts when dialing out of phonebook.
Added VM, missed calls, headset icon.
Removed “Intercom”feature.
Removed “Internal Call” from audio ring tone menu
Adjusted Call History and Contacts menu architecture.
Moved "Edit Dial" option to last one in Call History and Contacts menu option.
Hide empty fields when displaying contact info.
Hide icon after press back key in idle misses call or VM alert screen.
Moved “Standard ring” to last one of ring tone list.
Missed Call can be dialed back via related SIP profile using softkey.
Firmware Version 1.0.1.4
Added Call and Delete soft keys during off-hook dial.
Added sending proprietary message to base when handset start new base searching.
Added left soft key for Voice mail alert window to enter the Play Message window.
Added sending a proprietary message to base when handset do a factory reset.
Added send a proprietary message to base before handset power off.
Added Do not create alert window when there is an outgoing call.
Added Display line name info immediately after off-hook.
Changed to only press ESC key to show factory menu.
Added Support for Korean DECT region setting.
Added Dial number immediately after off-hook.
Added Call and Delete soft keys during off-hook dial.
Added Dialing GUI enhancements.
Added ability to configure menu key timeout, Settings -> Display -> Menu Key Timeout.

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DP750/DP720 User Guide
Added Handset will prompt saved successfully if configuring call forward settings in ring group.
Added Reset handset name to default if handset is unsubscribed.
Added Implement DHCPv4 Option 120.
Move Network Settings and Phonebook tabs.
Added handset version (firmware) to system status page.
Web UI Status Enhancements.
Changed location of handset firmware upload/delete.
Added debug syslog message for registration disabled due to 403.
Added advisory tone for handset put in and out of cradle.
Added ability to configure menu key timeout.
Added when last name is none use the first name for speed dial record name.
Added When handset enter IVR, press RSK hold key will delete dial number.
Added GS Proprietary DTMF codes for special features.
Added stop dial tone if first key not number key after off hook
Firmware Version 1.0.0.16
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
Feature Highlights
The following tables contain the major features of the DP750 / DP720:
Table 1: DP750 Features in a Glance
Table 2: DP720 Features in a Glance
DP750
5 handsets.
10 accounts.
10 lines.
4 concurrent calls.
PoE power support.
300m range outdoor / 50m range indoor.
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 ring modes.

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DP750/DP720 User Guide
DP750 Technical Specifications
The following table resumes 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), 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
Protocols/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, downloadable phonebook (XML, LDAP, up to 3000
entries), call waiting, call log (up to 300 records), auto answer, flexible dial plan, music on
hold, server redundancy and fail-over
Sample Applications
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)
Ring Group
Flexible options when multiple handsets share the same SIP account
Circular Mode: all phones ring sequentially, starting with the phone after the one
which rang last.

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DP750/DP720 User Guide
Linear Mode: all phones ring sequentially in the predetermined order, starting with
the first phone each time.
Parallel Mode: all phones ring concurrently; 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 & 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, GPL Statement
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: -10º to 55ºC (14 to 131ºF); Storage: -20º to 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 table resumes all the technical specifications including the protocols / standards supported,
voice codecs, telephony features, languages and upgrade/provisioning settings for the DP720 handset.
Table 4: DP720 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 softkeys, 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
Protocols/Standards
Hearing Aid Compatibility (HAC) compliant
Voice Codecs
G.722 codec for HD audio and G.726 codec for narrow band audio (G.711μ/a-law, G.723.1,
G.729A/B, iLBC and OPUS are supported via companion DECT base station DP750), AEC,
AGC, Ambient noise reduction

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DP750/DP720 User Guide
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
Currency (pending)
HD Audio
Yes, in both Handset and Speakerphone modes
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 & 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) AAA batteries (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: 138g, charger cradle: 71g, universal power supply: 50g; Package: 360g
Temperature
and Humidity
Operation: -10º to 50ºC (14 to 122ºF); Charging: 0 to 45ºC (32 to 113ºF); Storage: -20º to
60ºC (-4 to 140ºF); Humidity: 10% to 90% non-condensing
Compliance
FCC: Part 15D; 47 CFR 2.1093 & IEEE1528-2013, Part68, Part 15B
CE: EN60950; EN301489-1-6; EN301406; EN50360; EN62209-1
RCM: AS/NZS60950; AS/ACIF S040; AS/ACIF S004; AS/CAS004:2013 (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 micro-USB 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 POE, 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 DP720 handset
Please follow below 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.
Note: Please charge the batteries fully before using the handset for the first time
Figure 5: Setting up the DP720
Battery Information
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.
The specifications may differ depending on the age and capacity of the batteries used.
Important Note: Be careful when inserting the batteries into your handset to avoid any risk of short-circuits
which lead to damage your batteries and/or the handset itself. Do not use damaged battery which can
increase the risk of serious harm.