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Supported devices
ATA Adaptors
IP Phones
Cordless DECT IP Phones
IP Conference Phones
IP PBX Software/Hardware
Desktop Softphones
Mobile Softphones

Security considerations for Callcentric customers

3CX
3CX Version 6
3CX Version 12
3CX Version 12.5
3CX Version 15
3CXPhone (for Windows)
3CXPhone (Mobile)
Aastra 6753i
Acrobits/Groundwire for iPhone
Android SIP Client
Apivio MWP1100
Asterisk 1.4 and 1.2
Asterisk 1.6
Asterisk 1.6.2, 1.8, and 10
Asterisk 14
Asterisk Admin GUI v2.11
Asterisk Admin GUI v12
Asterisk Admin GUI v13
Bria Desktop
Bria Mobile
Callcentric Android App
Callcentric iPhone App
Callcentric Softphone
Cisco ATA 186/188
Cisco SPA112/SPA122
CloudTC Glass 1000
CSipSimple
D-Link DVG-1402S
Ekiga
Elastix
Gigaset A510 IP
Gigaset C610A IP
Gigaset DX800A
Grandstream DP715/710
Grandstream DP750/720
Grandstream GXP1450
Grandstream GXP1620
Grandstream GXP1625
Grandstream GXP1760
Grandstream GXP1782
Grandstream GXP2110
Grandstream GXP2130
Grandstream GXP2140
Grandstream GXP2160
Grandstream GXP2200
Grandstream GXV3140
Grandstream GXV3240
Grandstream GXV3275
Grandstream HandyTone 286
Grandstream HandyTone 486
Grandstream HandyTone 702
Grandstream Wave
Htek UC803
Htek UC860
Htek UC924
Htek UC926
Innomedia SIP MTA-6328
Jitsi
Linksys PAP2
Linksys SPA3102
Linphone Desktop
Linphone Mobile
Linphone Mobile (v.3.2.3)
NCH Axon PBX
NCH Express Talk
Nokia E90
Obihai
OBi100/110
OBi200/202
OBi1032
pbx-in-a-flash
pbxnsip
pbxnsip Version 3
PhonerLite
Polycom SoundPoint IP 601
Polycom SoundStation IP 5000
snom 1xx/2xx/3xx
snom 820
snom M9
snom ONE
SFLphone
SJphone
Telco AC-211
trixbox / Elastix / pbx-in-a-flash
Twinkle
Windows Messenger
Unidata ICW1000G
Uniden EXP1240
UTStarcom F3000
Vodia PBX
VTech VCS754
VTech VSP600
VTech VSP725
VTech VSP726
VTech VSP735
VTech VSP736
X-Lite / X-Pro / eyeBeam
Yealink T32G
Yealink T41S
Yealink T42G
Yealink T42S
Yealink T46G
Yealink T46S
Yealink T48S
Yealink W52P
Yeastar MyPBX U100
ZoIPer
ZoIPer 3.2
ZoIPer Mobile
Zoom 5801
Other Linksys/Sipura products
Generic / Other Device

DID-Based Routing with Asterisk
DID-Based Routing with trixbox / Asterisk Admin GUI / Elastix / PBX-in-a-Flash
Grandstream GXP1620

GENERAL INFORMATION
Grandstream GXP1625The Grandstream GXP1620/GXP1625 IP phones are geared specifically for small to mid-sized businesses. Cost effective and feature rich, these phones offer support for multiple SIP Accounts/Call Appearances, HD Audio, Conference Calling, PoE (Power Over Ethernet), and more...


RESOURCES
Websites:
Grandstream Homepage
Grandstream GXP1620 product page

Help / Support:
Grandstream GXP1620 resource page
Grandstream GXP1620 product manual


Configuring the GXP1620/GXP1625
The setup guide below is based the GXP1625, running on firmware revision 1.0.1.10; if you are running a different software version or are using the GXP1620 some menus/settings may be slightly different. These instructions are also based on using the GXP1625 in its factory default configuration, which obtains a dynamic IP address automatically from your router using DHCP. For information on configuring your GXP1625 with a static IP address, please refer to the GXP1625 user manual.

In this guide we will go through configuring the GXP1625 in order to register to the Callcentric servers so that you will be able to place and receive calls using your Callcentric account. Before proceeding, 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 GXP1625 and our service. If you need additional assistance with any specific issue please let us know.
STEP 1 Logging into your device
Log into the GXP1625's administrative interface by using the supplied default username (admin) and default password (admin).



STEP 2 Configuring your Callcentric account
From the top menu bar, please select the Accounts option. After doing so, select the Accounts 1 >> General Settings option; which is located on the side menu bar.



Please use the settings detailed in the screen captures below. After your have finished entering these settings, click on the Save and Apply button to apply/save your settings:

SettingValue
Account ActiveYes
Account Namecallcentric
SIP Servercallcentric.com
Outbound Proxycallcentric.com
SIP User IDThis 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 IDThis 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 PasswordEnter 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.
NameYou may enter any value for this option.
Voice Mail UserID*123




Next, locate the Account 1 >> Network Settings menu option 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:



SettingValue
DNS ModeSRV
NAT TraversalKeep-Alive


After completing the steps detailed above, locate the Account 1 >> SIP Settings >> Basic Settings menu option 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:



SettingValue
Unregister on RebootInstance
Remove OBP from routeYes


Next, locate the Account 1 >> Audio Settings menu option 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:



Send DTMFIn audio
via RTP (RFC2833)
Preferred Vocoder - choice 1PCMU
Preferred Vocoder - choice 2G729A/B
Preferred Vocoder - choice 3PCMU
Preferred Vocoder - choice 4PCMU
Preferred Vocoder - choice 5PCMU


Finally, locate the Account 1 >> Call Settings menu option 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:



Dial Plan{[x*]+}
Enable Call FeaturesNo


STEP 3 Checking Registration Status
To ensure that your GXP1625 has successfully registered to our service click on the Status option on the top menu bar. Locate the Account Status section; you should see that the Account you just configured is now Registered.



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 GXP1450 installation, follow the directions listed in this FAQ.