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

Security considerations for Callcentric customers

3CX Version 6
3CX Version 12
3CX Version 12.5
3CX Version 15
3CX Version 16
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 17 CHAN_SIP (Vanilla)
Asterisk 17 PJSIP (Vanilla)
Asterisk Admin GUI v2.11
Asterisk Admin GUI v12
Asterisk Admin GUI v13
Asterisk Admin GUI v15
Bria Solo
Bria Desktop
Bria Mobile
Callcentric Android Click2Dial App
Callcentric iPhone Click2Dial App
Cisco ATA 186/188
Cisco SPA112/SPA122
CloudTC Glass 1000
D-Link DVG-1402S
Gigaset A510 IP
Gigaset C610A IP
Gigaset DX800A
Grandstream DP715/710
Grandstream DP750/720
Grandstream DP752/730/722
Grandstream GAC2500
Grandstream GRP2612
Grandstream GRP2613
Grandstream GRP2614
Grandstream GRP2615
Grandstream GXP1450
Grandstream GXP1620
Grandstream GXP1625
Grandstream GXP1630
Grandstream GXP1760
Grandstream GXP1782
Grandstream GXP2110
Grandstream GXP2130
Grandstream GXP2140
Grandstream GXP2160
Grandstream GXP2170
Grandstream GXP2200
Grandstream GXV3140
Grandstream GXV3240
Grandstream GXV3275
Grandstream GXV3370
Grandstream GXV3380
Grandstream HandyTone 286
Grandstream HandyTone 486
Grandstream HandyTone 702
Grandstream HandyTone HT802
Grandstream HandyTone HT814
Grandstream HandyTone HT818
Grandstream UCM6102
Grandstream UCM6204
Grandstream Wave Lite
Grandstream WP820
Htek UC803
Htek UC860
Htek UC924
Htek UC926
Innomedia SIP MTA-6328
Innomedia BuddyTalk 110
Linksys PAP2
Linksys SPA3102
Linphone Desktop (v4.1.1)
Linphone Desktop (v3.4.3)
Linphone Mobile
Linphone Mobile (v.3.2.3)
NCH Express Talk
Nokia E90
pbxnsip Version 3
Polycom SoundPoint IP 601
Polycom SoundStation IP 5000
snom 1xx/2xx/3xx
snom 820
snom D717
snom D735
snom D785
snom M9
snom ONE
Telco AC-211
trixbox / Elastix / pbx-in-a-flash
Windows Messenger
Unidata ICW1000G
Uniden EXP1240
UTStarcom F3000
Vodia PBX (v5)
Vodia PBX (v64.0)
VTech VCS754
VTech VDP650
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 3.2
ZoIPer 5
ZoIPer Mobile
Zoom 5801
Zycoo CooVox U20
Other Linksys/Sipura products
Generic / Other Device

DID-Based Routing with Asterisk
Grandstream GXP2110

Grandstream GXP2110The GXP2110 is a 4-line device refresh of Grandstream's business line of Office IP phones. It offers the necessary features and stability one would expect form a phone meant for business usage in a responsive and simple to use device. We have found the GXP2110 to be reliable, full featured, easy to configure, and comparatively affordable.

Grandstream Homepage

Help / Support:
Grandstream GXP2110 resource page
Grandstream GXP2110 product manual

Configuring Grandstream GXP2110
These instructions are based on Grandstream GXP2110 software version; if you are running a different software version some menus and settings may be different. These instructions are also based on using the GXP2110 in its factory default configuration, which obtains a dynamic IP address automatically from your router using DHCP. For information on configuring your GXP2110 with a static IP address please refer to the GXP2110 user manual.

Configuring the GXP2110 is relatively straightforward; while there are many options available you only need to edit a few of them to get up and running.

We recommend that you read each step through in its entirety before performing the action indicated in the step.
STEP 1 Connecting the GXP2110 to your network
Connect your GXP2110 to your router or switch using the included Ethernet cable. Once that is done, plug the AC adapter to your phone. Then plug the other end to an available power outlet.

STEP 2 Accessing your web configuration
Once you have powered up your GXP2110 plus wait 60 seconds for it to fully boot up.

On the LCD Screen of the phone, directly beneath the Grandstream logo you should see the device's IP address, which will be in a similar format to for example. Note that the actual numbers you see will most likely be different.

On your computer launch your favorite web browser such as Chrome, Firefox, Internet Explorer, or Safari, and enter the IP address that you see on your phones LCD screen in the address bar(the same location where you enter web addresses).

STEP 3 Logging in to the GXP2110
You should now see a page that looks like this:

Enter the GXP2110's password in to the "Password" field shown, by default this password should be admin. Once you have logged in you should see a page that looks similar to the screen shot below:

STEP 4 Configuring your Callcentric account
We will now configure one of the lines on the GXP2110 to work with your Callcentric account. To begin, and assuming you are still on the Status page shown in the previous step, please click the Accounts link on the top of the page as highlighted below:

From there you should be brought to the Account 1 settings page. Once there make the following changes in your configuration:
Account Name:Your Name (or your choice of name)
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.
Authenticate 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:1777MYCCID, or any name you choose
DNS Mode:A Record
Send DTMF:via RTP (RFC2833)
Dial Plan:{[x*]+}
Preferred Vocoder:PCMU, PCMA, G.729A/B

Your configuration should look similar to the one shown in the picture below:

And your codec configuration should look as follows(note that G.722 is optional, feel free to replace it with PCMU):

Once all changes have been made please click the "Update" button on the bottom of the page, then "Reboot" on the page that you are brought to after the update.

You should then see the status for the account, Account 1, Account 2... etc., you just configured shown as Registered:

STEP 5 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

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 GXP2110 installation, follow the directions listed in this FAQ.