internet phone service

Grandstream's DP750/DP720 is a reliable inexpensive yet powerful DECT cordless IP Phone that works with the Callcentric service when placed behind your broadband internet router. You can add upwards of to 5 cordless handsets (DP720) paired up to a single base station (DP750).

RESOURCES

Websites
Grandstream Homepage
Grandstream DP720 Product Page
Grandstream DP750 Product Page

Help/Support
DP750/720 Product Manual

Configuring the DP750/720

This setup guide is for the Grandstream DP750 and is based on firmware revision 1.0.1.20. If you are running a different firmware version some of the menus/settings may be different. These instructions are also based on using the DP750 in its factory default configuration, which obtains a dynamic IP address automatically from your router using DHCP. For information on configuring your DP750 with a Static IP Address, please refer to the DP750 user manual.

In this guide we will go through configuring the DP750 in order to register to the Callcentric servers so that you will be able to place and receive calls using your Callcentric account. Before moving forward please ensure that you have properly added the device to your network by connecting it to your router or gateway.

We recommend that you read each step through in its entirety before performing the action(s) indicated within the step.

Note: Although this device supports many advanced features/options; this guide will only detail the specific settings which are required to establish basic connectivity between your DP750 and our service. If you need additional assistance with any specific issue please let us know.

Step 1

Pairing to the base station

By default, your DP720 (the handset) is not paired with the DP750 (the base station). Following the instructions below will allow you to pair at least one handset to your base station. If your handset is already paired with your base station, you may proceed to step 2 of our setup guide.

Assuming that the base station is fully powered and your handset is fully charged; press/hold the radio/page button on the base station (indicated by the icon ) for 7 seconds
Next, while the radio icon on the base station is blinking go to the handset itself and press menu and from there navigate to Settings >> Registration >> Register
From the Subscribe Base selection screen, select the base station you would like to associate with, and select Subscribe

Once completed, if your handset has successfully paired with the base station, you should receive a Handset Subscribed notification on the screen.

Note If you do run into any issues pairing your handset to your base station, please refer to the DP750 user manual for additional information.

Step 2

Logging into your base station

Before you can log into your base station's web configurations, you will need to retrieve the IP Address of your base station. To do so, from your handset, press the menu key and navigate to Status >> IP Address.

Next, open a web browser on your computer (Chrome, Firefox, Internet Explorer, Safari, etc) and enter the IP Address that is displayed on your phones LCD screen into the address bar. You should be presented with a login screen similar to the screenshot below:

Login to the DP750's administrative interface by using the default username (admin) and default password (admin).

Step 3

Configuring your Callcentric account

From the top menu bar, locate the sub menu option Profiles >> Profile 1 >> General Settings; as indicated by the screenshot below:

You should now be in the General Settings configuration page. Please use the settings detailed in the screen captures below. After you have finished entering these settings, click on the Save and Apply button to apply/save your settings:


Setting	Value
Profile Active	Yes
SIP Server	sip.callcentric.net
Prefer Primary SIP Server	Yes
Outbound Proxy	sip.callcentric.net
Voice Mail Access Number	*123

Next, click on Network Settings which is located on the side menu bar. On this page, please use the settings detailed in the screen captures below. After you have finished entering these settings, click on the Save and Apply button to apply/save your settings:


Setting	Value
DNS Mode	SRV
NAT Traversal	keep-alive

Proceed to the SIP Settings >> Basic Settings menu option on the side menu bar. From here, set the following options detailed in the screen capture below. After you have finished entering these settings, click on the Save and Apply button to apply/save your settings:


Setting	Value
Unregister on Reboot	Yes
Remove OBP from Route	Yes

Next, click on Audio Settings which is located on the side menu bar. On this page, please use the settings detailed in the screen captures below. After you have finished entering these settings, click on the Save and Apply button to apply/save your settings:


Setting	Value
Preferred DTMF Method	1 - RFC2833 2-3 In-Audio
Preferred Vocoder	1 - PCMU 2 - G729 3-8 PCMU

Next, click on Call Settings which is located on the side menu bar. On this page, please use the settings detailed in the screen captures below. After you have finished entering these settings, click on the Save and Apply button to apply/save your settings:


Setting	Value
Dialplan	{[x*]+}
Enable Call Features	No

From the top menu bar, locate the sub menu option DECT >> SIP Account Settings; as indicated by the screenshot below:

On this page, for Account 1, specify the following parameters as indicated below. Once completed, click on the Save and Apply button to save your changes:


Setting	Value
SIP User ID	This is either the default extension 1777MYCCID OR 1777MYCCIDEXT, where 1777MYCCID is the 1777 number assigned to you by Callcentric and EXT is the three digit extension you are trying to register this UA to. For example: 17770001234101 would register to extension 101 on account 17770001234. You cannot register to your account using only the extension number.
Authenticate ID	This is either the default extension 1777MYCCID OR 1777MYCCIDEXT, where 1777MYCCID is the 1777 number assigned to you by Callcentric and EXT is the three digit extension you are trying to register this UA to. For example: 17770001234101 would register to extension 101 on account 17770001234. You cannot register to your account using only the extension number.
Password	Enter your extension SIP Password here. Your extension SIP password is the password you created for the extension you are trying to use. You may edit the SIP password you wish to use in by logging into your My Callcentric account and clicking on the Extension menu link and then modifying the appropriate extension.
Name	You may specify any name on this field
Active	Yes

Step 4

That's it! You can now make a phone call.

You can make a test call to 17771234567, or if you are signed up for one of Callcentric's rate plans you can place a call to a traditional landline or mobile phone by dialing either:
1 + the area code and number for calls to the US
Or
011 + the country code, area code, and number for calls worldwide (you may also use 00 instead of 011).

To test inbound calls from Callcentric to your DP750/DP720 installation, follow the directions listed in this FAQ.