Why does Barge fail and result in a fast busy tone on my Cisco 7975G?
Barge fails and results in a fast busy tone because you cannot barge an encrypted call if the phone you are using is not configured for encryption.
What to do if the softkey that I want to use does not appear on my Cisco 7975G IP Phone?
If the softkey you want to use does not appear, you may need to press 'more' to reveal additional softkeys. Alternatively, you might need to change the line state, for example, by going off-hook or having a connected call. It is also possible that your phone is not configured to support the feature associated with that softkey.
Why does my Cisco IP Phone have no dial tone or cannot complete a call?
If your Cisco IP Phone displays no dial tone or cannot complete a call, it might be due to several reasons. You may not be connected to the Extension Mobility service, so log into it. The system might require a Client Matter Code (CMC) or Forced Authorization Code (FAC) after dialing a number; if so, enter the required code. Alternatively, time-of-day restrictions might be preventing you from using certain features; in this case, change the time-of-day restrictions.
What to do if the phone screen appears blank on my Cisco 7975G IP Phone?
To wake the touchscreen, try pressing it, lifting the handset, or pressing any button.
Why does my Cisco 7975G reset unexpectedly?
If your Cisco Unified IP Phone resets unexpectedly, and the network connection and Cisco Unified Communications Manager connection appear stable, further investigation is required to determine the cause. If the phone has trouble connecting to the Ethernet network or Cisco Unified Communications Manager, verify the Ethernet connection. Check if the port or switch the phone is connected to is down or rebooting. Intermittent network outages can affect voice traffic. If you experience voice network issues, investigate whether an existing problem is being exposed.
What to check if Cisco 7975G IP Phone call cannot be established?
If your Cisco IP Phone call cannot be established, verify the following: 1. The Ethernet cable is properly attached. 2. The Cisco CallManager service is running on the Cisco Unified Communications Manager server. 3. Both phones are registered to the same Cisco Unified Communications Manager. 4. Audio server debug and capture logs are enabled for both phones. Enable Java debug if needed.
Why does my Cisco IP Phone report TFTP authorization failure?
If your Cisco IP Phone reports TFTP authorization failure, it could be because the TFTP address for the phone does not exist in the CTL file. Also, if you created a new CTL file with a new TFTP record, the existing CTL file on the phone may not contain a record for the new TFTP server.
What does '802.1X Not Enabled' mean on my Cisco 7975G?
If you receive an '802.1X Not Enabled' error on your Cisco IP Phone, it typically indicates that 802.1X authentication is not enabled on the phone. To enable it, see the “802.1X Authentication and Status” section on page 4-36.
Why can't I hear a dial tone on my Cisco IP Phone?
If you cannot hear a dial tone or complete a call on your Cisco IP Phone, it might be because you need to log into the Extension Mobility service. Alternatively, you may need to enter a client matter code (CMC) or forced authorization code (FAC) after dialing a number, if you are using an SCCP phone. It is also possible that time-of-day restrictions prevent you from using some features during certain hours.
What to do if softkey does not appear on Cisco 7975G IP Phone?
If a softkey that you want to use does not appear on your Cisco IP Phone, press the 'more' button to reveal additional softkeys. You might also need to change the line state, for example, by going off-hook or having a connected call. Additionally, your phone might not be configured to support the feature associated with that softkey.
Details programmable buttons for access to lines, services, and call features, and the footstand for angle adjustment.
Explains the functions of display, messages, directories, help, settings, services, volume, speaker, mute, and headset buttons.
Covers navigation pads, keypad, softkey buttons, handset light strip, and the phone screen for user interaction.
Explains the primary phone line, programmable buttons, softkey labels, status line, call activity area, phone tab, and feature tabs on the phone screen.
General| Handset type | Wired handset |
|---|---|
| Product type | IP Phone |
| Product color | Grey, Silver |
| Speakerphone | Yes |
| Voice codecs | G.711Mu, G.711a, G.722, G.729A, iLBC |
| Number of melodies | 24 |
| Aspect ratio | 4:3 |
| Display diagonal | 5.6 \ |
| Display resolution | 320 x 240 pixels |
| Lines quantity | 8 lines |
| Phonebook capacity | - entries |
| Number of VoIP accounts | - |
| Front camera | No |
| Security algorithms | 128-bit AES |
| Networking standards | IEEE 802.1Q, IEEE 802.1p, IEEE 802.1x, IEEE 802.3af |
| Ethernet LAN data rates | 10, 100, 1000 Mbit/s |
| Ethernet LAN interface type | Gigabit Ethernet |
| Supported network protocols | DHCP, TFTP |
| Volume control | Digital |
| Headphone outputs | 1 |
| Ethernet LAN (RJ-45) ports | 2 |
| Number of handles included | 1 pc(s) |
| AC adapter output voltage | 48 V |
| Storage temperature (T-T) | -10 - 60 °C |
| Operating temperature (T-T) | 0 - 40 °C |
| Operating relative humidity (H-H) | 10 - 95 % |
| Certification | FCC |
Weight and Dimensions| Depth | 152.4 mm |
|---|---|
| Width | 266.7 mm |
| Height | 203.2 mm |
| Weight | 1600 g |
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