Grandstream DP750 IP Phone Firmware 1.0.13.0

ENHANCEMENT

- Improved the accuracy of battery detection for DP720.
- Added option to use sip or sips for SIP URI scheme when using TLS. [SIP URI SCHEME WHEN USING TLS]
- Added support for DHCP option 67.
- Added OpenVPN Comp-lzo option under OpenVPN Settings page. [OPENVPN COMP-LZO]
- Added support to disable web UI access by adding the “Disable” option for Web Access Mode setting.
- Add handset option for blind transfer and attended transfer.
- Added DP720 charging current displaying in Settings -> Factory Functions -> System Monitoring.
- Updated the CPE to better support GDMS.
- Added support for SNMP. [SNMP]
- Added support for management interface settings that using a virtual network interface.[MANAGEMENT INTERFACE SETTING]
- Added support for intercom feature without SIP account. [INTERCOM FEATURE WITHOUT SIP ACCOUNT]
- Added support for transfer between HS internally without SIP. [TRANSFER BETWEEN HS INTERNALLY WITHOUT SIP]
- Added support for Broadsoft XSI phonebook. [BROADSOFT XSI PHONEBOOK]
- Added support for Feature Key Synchronization that support both Broadsoft and MetaSwitch, or any server that following the same feature key synchronize standard.[FEATURE KEY SYNCHRONIZATION]
- Added support for Russian keyboard when the language is set to Russian.
- Added support for option "Backup Outbound Proxy" in all Profiles. [BACKUP OUTBOUND PROXY]
- Added support for option "Use SBC" in all Profiles. [USE SBC]
- Added support for new xml format and text format in config files.
- Updated CPE to version 1.0.1.138 to better support GDMS.
- Display configured base station name in the handset “select base” menu instead of using RFPI number.

BUG FIX

- Fixed DP7xx will stop play ringback tone if handset enabled keypad tone and pressed a key during the ringback period.
- Fixed DP72x and DP730 have some Portuguese wrong translations.
- Fixed DP72x and DP730 do not play call waiting tone when a SIP account is parallel mode and be used in 2 or more handsets.
- Fixed handset failed to display contacts and call history if continuously off hook when connected with a DP760 repeater.
- Fixed DP72x and DP730 may fail to make calls after transfer a call via Intercom call to other handsets.
- Fixed DP75x cannot provision a config XML file that in new alias format.
- Fixed DP72x and DP730 Intercom calls sometimes has no audio.
- Fixed DP75x "Refer-To Use Target Contact" setting does not take effect, which is caused of the "Remote-Part-ID" header field in the INVITE not being correctly processed.
- Fixed DP72x and DP730 issue that after changed the line 1 account, it still uses previous line 1 account by default to dial out.
- Fixed DP75x Web UI option "Remove OBP from Route" does not work issue.
- Fixed DP75x does not send INVITE to Backup Outbound Proxy when the Outbound Proxy is not available.
- Fixed DP72x and DP730 Voicemail Access Number cannot be removed from the LCD settings.
- Fixed DP7xx automatically un-hold a call after 90 seconds.
- Correct São Paulo / Brazil time zone to be UTC-3.
- Added regex limits to SNMP trap address.
- Fixed DP75x CTI calling feature stops working after first CTI call ended.
- Fixed DP75x dial plan incorrectly matched for some cases and failed to append the prefix for dial out number.
- Fixed DP75x LDAPS protocol not working.
- Fixed TR069 ACS URL allows blank space issue.
- Fixed subscription button does not work if reset type set to disabled.
- Fixed HS displays only the first contact's number when an entry has multiple number on same attribute.
- Fixed “Transfer on Conference Hangup” does not work when the handset use different lines to make conference.
- Fixed DP75x does not take DTMF during dialing in some cases. 

About VoIP Phone Updates:

Firmware updates for VoIP Phones are very important as they usually contain many bug fixes, add new features and updates, as well as add additional security features.

One of the main problems users come across when attempting to upgrade their VoIP Phone is that their device may be locked to a certain Carrier. Adding an unlocked version of the firmware may cause the device to stop working on certain networks. This operation may void your carrier warranty and, as such, is not recommended.

Before downloading, make sure that you have selected the appropriate firmware for your device and that the update supports the VoIP service provider you use.

Generally, it is important to upgrade older firmware in sequence (v1 to v2 to v3) and so on, because many manufacturers don't launch standalone update packages.

Although using beta release firmware packages is tempting, it can prove to be quite risky as well. If you choose to try beta release updates, please read the detailed firmware notes and make sure that you have the possibility to revert to an older and more stable version in case the beta turns out faulty.

If you feel that this update can improve the functionality of your VoIP Phone, please use the download button and follow the installation instructions.