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[http://www.grandstream.com](http://www.grandstream.com. Al)[. Al](http://www.grandstream.com. Al)l rights reserved. Information in this  \ndocument is subject to change without notice. Reproduction or transmittal of the entire or any part, in any form or by any means, electronic or print, for any purpose without the express written permission of Grandstream Networks, [Inc. is](Inc. is) not allowed.  \nThe latest electronic version of this user manual is available for download here:  \n[http://www.grandstream.com/support](http://www.grandstream.com/support)  \nGrandstream is a registered trademark and Grandstream logo is trademark of Grandstream Networks, Inc. in the United States, Europe and other countries.  \nCAUTION  \nChanges or modifications to this product not expressly approved by Grandstream, or operation of this product in any way other than as detailed by this User Manual, could void your manufacturer warranty.  \nWARNING  \nPlease do not use a different power adaptor with your devices as it may cause damage to the products and void the manufacturer warranty.  \nGNU GPL INFORMATION  \nUCM6510 firmware contains third-party software licensed under the GNU General Public License (GPL) . Grandstream uses software under the specific terms of the GPL. Please see the GNU General Public License (GPL) for the exact terms and conditions of the license.  \nGrandstream GNU GPL related source code can be downloaded from Grandstream web site from:  \n[http://www.grandstream.com/support/faq/gnu-general-public-license/gnu-gpl-information-download](http://www.grandstream.com/support/faq/gnu-general-public-license/gnu-gpl-information-download)  \nTable of Content  \nDOCUMENT PURPOSE...........................................................................27  \nCHANGE LOG .........................................................................................28  \nFirmware Version [1.0.20.38](1.0.20.38)................................................................................................................. 28  \nFirmware Version [1.0.20.34](1.0.20.34)................................................................................................................. 28  \nFirmware Version [1.0.20.31](1.0.20.31)................................................................................................................. 28  \nFirmware Version [1.0.20.28](1.0.20.28)................................................................................................................. 29  \nFirmware Version [1.0.20.23](1.0.20.23)................................................................................................................. 29  \nFirmware Version [1.0.20.22](1.0.20.22)................................................................................................................. 29  \nFirmware Version [1.0.20.20](1.0.20.20)................................................................................................................. 29  \nFirmware Version [1.0.20.17](1.0.20.17)................................................................................................................. 29  \nFirmware Version [1.0.19.29](1.0.19.29)................................................................................................................. 34  \nFirmware Version [1.0.19.27](1.0.19.27)................................................................................................................. 34  \nFirmware Version [1.0.19.21](1.0.19.21)................................................................................................................. 35  \nFirmware Version [1.0.18.13](1.0.18.13)................................................................................................................. 35  \nFirmware Version [1.0.18.12](1.0.18.12)....................................................................................","cbCairkhm4zq08sf","https://ap.wps.com/l/cbCairkhm4zq08sf","pdf",14112244,488,"English","# Document Purpose\n# Change Log\n## Firmware Version 1.0.20.38\n## Firmware Version 1.0.20.34\n## Firmware Version 1.0.20.31\n## Firmware Version 1.0.20.28\n## Firmware Version 1.0.20.23\n## Firmware Version 1.0.20.22\n## Firmware Version 1.0.20.20\n## Firmware Version 1.0.20.17\n## Firmware Version 1.0.19.29\n## Firmware Version 1.0.19.27\n## Firmware Version 1.0.19.21\n## Firmware Version 1.0.18.13\n## Firmware Version 1.0.18.12\n## Firmware Version 1.0.18.9\n## Firmware Version 1.0.17.16\n## Firmware Version 1.0.16.20\n## Firmware Version 1.0.16.18\n## Firmware Version 1.0.15.16\n## Firmware Version 1.0.14.24\n## Firmware Version 1.0.14.23\n## Firmware Version 1.0.14.21\n## Firmware Version 1.0.13.14\n## Firmware Version 1.0.12.19\n## Firmware Version 1.0.11.27\n## Firmware Version 1.0.10.44\n## Firmware Version 1.0.10.39","[{\"question\":\"What is the document’s purpose section about?\",\"answer\":\"The manual includes a “DOCUMENT PURPOSE” section that starts the guidance for using the UCM6510 IP PBX.\"},{\"question\":\"Why does the manual warn against modifications or using a different power adaptor?\",\"answer\":\"It cautions that changes not expressly approved, or operation outside the User Manual’s details, could void the manufacturer warranty. It also warns not to use a different power adaptor because it may damage the product and void warranty.\"},{\"question\":\"What GNU GPL information is provided for UCM6510 firmware?\",\"answer\":\"The manual states that UCM6510 firmware contains third-party software licensed under the GNU General Public License (GPL) and points to the GPL terms. It also provides a download location for related GPL source code.\"}]","UCM6510 IP PBX User Manual | PDF",1790366215,171]