Yes, Grandstream Wave does support SIP video calling.

There are several ways to do firmware upgrade on GXP2200.

1. From Grandstream firmware server.
Users could directly upgrade the GXP2200 to the official firmware version using Grandstream firmware server via HTTP. Please point your GXP2200 to firmware.grandstream.com and select upgrade via HTTP and reboot the phone.
2. Upgrade GXP2200 via HTTP/TFTP/HTTPS.
Put the firmware file downloaded from our resources library in a HTTP/TFTP/HTTPS server. Then point the GXP2200 to the corresponding server address to get upgraded.

3. Upload manually via GXP2200 web GUI.
From GXP2200 web GUI->Maintenance->Upgrade, users could select manually upgrading the firmware. Select the firmware file from local directory of the PC and then start uploading.

4. Upgrade via SD card.
- Download the firmware file from our resources library and save it in SD card;
- Insert the SD card to GXP2200 and power cycle the GXP2200;
- When the GXP2200 starts booting up, press and hold both * and # keys at the same time for about 5 seconds;
- The GXP2200 will display the upgrading process in the screen. Wait till the upgrading is done.
- The GXP2200 will reboot itself. Check the firmware status and remove the SD card.

The files such as PDF documents and pictures downloaded from GXV3240/GXV3275 browser will be stored in GXV3240/GXV3275's internal storage. To manage downloaded/installed apps, please go to Settings -> Applications.

By default, the LCD does not have a lock configured. If you have configured the LCD lock and forgotten the user name and password, you will have to perform a factory reset to clear the lock. Log into the web interface, select [Maintenance]→[Upgrade and Provisioning]→[Factory Reset] →[Reset]. After the factory reset, you can also reconfigure the LCD lock password by selecting [MENU]→[Personalize]→[My Profile]. It is recommended not to lock the LCD screen unless necessary.

If you cannot log into the web configuration interface because you do not know the phone’s IP address, then you will need to connect the phone and a PC to the same hub. You can then use a network sniffer tool such as Wireshark/Ethereal on your PC to capture traffic on the network. You can now obtain the phone’s IP address by searching for the corresponding MAC address (found on the back of the phone) in your sniffer (found on the back of the phone).

Grandstream Wave supports BLF, and can be used this way:
a. Go to Settings->Advanced Settings->enable BLA (bridged-line-appearance)
b. Go to "BLA List" -> tap on "+" to add the members -> then, you could check the status of the extensions you want. Only the extensions which are stored in your Grandstream Wave Contacts can be shown in the BLA list.
Note: The BLF works for the account which you choose as the default account. For example, if you choose account 2 as your default account, the BLF will show the status of extensions in account 2.

The BT model 101 (also called BT100) and 102 have the same software functions and the only difference is that model 101 has one Ethernet interface and model 102 has two Ethernet interfaces i.e. the PC port (to be connected to your computer) and normal LAN port (to be connected to your Internet Source.). These 2 ports are bridged together similar to a HUB. BT-200 is higher end version with Router feature and capable of supporting 100Mbps connections.

If you wish to configure the system so that the other party will be able to answer the call automatically, you would need to use the “Paging” feature on the GXV3140. By default, the calling method used for normal calls are in “Dialing” mode, the user is able to switch to the “Paging” mode by pressing the round OK button on the phone.

However, to implement the auto answer feature, you would need to configure the following on the remote party:

(1)On the GXV3140 LCD screen, select [MENU]->[Call Features]

(2)In the “Call Features” page, there are two tabs: “Call Forwarding” and “Other Features”. Use the right navigation button to toggle to the “Other Features” tab.

(3)Select the correct account and select “Paging/Intercom” in [Auto Answer].

(4) Save the settings by pressing the “Save” sofkey. After this is configured, the Auto answer icon will appear on the LCD screen.

Please go to Settings->Advanced Settings to enable Notifications for Default Account. If enabled, you’ll see the notifications in the status bar.

- Temp <= 0°C : Fan & Heater start - Temp >= 50°C : Fan start - 0°C < Temp < 50°C: Fan & Heater stop

Not for current GAC2500. But GAC2500 supports audio extension with another GAC2500 via cascade mode.

The time is synced up automatically with the NTP Server and it’s automatically adjusted depending on the time zone selected. The time settings cannot be configured manually on the handset.

Yes. By default, the Account widget on the GXP2200 idle screen can accommodate 6 accounts. Users can select the widegt size for 4 accounts or 2 accounts as well. Please see steps below:

- In the GXP2200 default idle screen, remove the default Account widget first by tapping and holding it into the Recycle Bin on the bottom of the screen.
- Tap and hold on an empty spot of the screen to activate the "Add to Home screen" dialog.
- Select "Widgets" in the "Add to Home screen" dialog.
- In the widget list, choose "Account" for 6 accounts; chosse "Account2X1" for 2 accounts; or choose "Acount4X1" for 4 accounts.