Limitations And Restrictions; Dtmf During On-Hook Dialing; Voice Vlan And Ipv6 Limitation - Cisco 6900 Series Release Notes

Cisco Unified IP Phone 6900 Series Release Notes for Firmware Release 9.4(1)
Firmware upgrades over the WLAN interface may take longer than upgrades using a wired connection.
Note
Upgrade times over the WLAN interface may take more than an hour, depending on the quality and
bandwidth of the wireless connection.
Procedure
Step 1 Go to the following URL:
http://www.cisco.com/cisco/software/navigator.html?mdfid=282677102&i=rm
Step 2 Choose your phone model.
Step 3
Choose one of the following firmware types:
• Skinny Client Control Protocol (SCCP) Software
• Session Initiation Protocol (SIP) Software
Step 4 In the Latest Releases folder, choose 9.4(1).
Step 5 Download the relevant zip files.
Step 6 Unzip the files.
Step 7 Manually copy the unzipped files to the directory on the TFTP server. See Cisco Unified Communications
Operating System Administration Guide for information about how to manually copy the firmware files to
the server.

Limitations and restrictions

DTMF during on-hook dialing

On-hook dialing can result in users hearing the DTMF from the key press in the handset. The tones are heard
if the handset is picked up while the last digit is pressed. If users pick up the handset after pressing the last
digit, they will normally not hear any DTMF.

Voice VLAN and IPv6 limitation

If the PC attached to the PC port of the phone is using IPv6, we recommend that the PC Voice LAN access
be disabled. This ensures that the PC can connect to the Voice VLAN.
◦ cmterm-6945-sip.9-4-1-1.zip
Cisco Unified IP Phone 6900 Series Release Notes for Firmware Release 9.4(1)
Limitations and restrictions
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