Additionally the focus of this article is primarily on the Lync Phone Edition firmware which runs on the Aries family of devices (Polycom CX500/600/3000, Aastra 6721ip/6725ip, and HP/SNOM 4110ip/420ip) but also references the original Tanjay version (Polycom CX7000, LG-Nortel 8540) on a few occasions.
The following list of topics are discussed in this article.
Obtain a new copy of the phone firmware and place it in the TFTPPath directory.
You should only copy files into this directory when the TFTP server software is shut down, otherwise the files may be corrupted.
But both NTLM and Certificate authentication methods are enabled and used by default for both the Windows Lync client and the Lync Phone Edition client.
Although NTLM authentication needs no introduction, this new-for-Lync certificate based method is still a mystery to many.
The configuration file for a particular phone is created when the phone is added to the Cisco Call Manager database.
If the phone has not been added to the Cisco Call Manager database, the TFTP server generates a CFG File Not Found response.
(For Cisco Discovery Protocol (CDP), the Vo IP capabilities bit is missing during initial boot)There is a guide to installing and updating to this firmware here:
The 7912/05 phones use a different configuration file format and syntax; for more information about configuring these phones please refer to Cisco 7905/7912 IP Phones.
With the right Cable, 79xx series phones can use standard POE injectors. )Cisco IP Phones use a TFTP server for its configuration files and firmware.
Asterisk has 2 implementations for this channel (required for the 7910/20): However, the 7905/79/60 can be reconfigured to use SIP (recommended for use with Asterisk): The 7905 doesn't have Speakerphone (only a speaker for call monitoring or on-hook dialing), its SIP image has by far the best user interface of all cisco SIP phones, plus it's nicely compact, and the display even has a higher resolution than that of the 7960.
The 7912 is the same as the 7905, but with a built-in ethernet switch.