Question about Cisco 7945G IP Phone

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People can not hear the caller on Cisco 7945G

I have a Cisco 7945G telephone that has issues with the other party not being able to hear anything from this phone. In other words, if I call someone from this phone, I hear them fine, but they can't hear me. It is silent for them. I also noticed that I don't hear my own voice coming through the handset when I talk. I assumed I had a bad handset so I swapped it with a handset from another identical phone, thinking it might be the internal mic on the handset. But that did not resolve the issue. I tried using a Plantronics headset with this phone and had the same problem. However, if I use the speakerphone function, then callers hear me fine. I tried a factory reset of the telephone but that did not resolve the issue either. Do I just have a defective phone?

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There are a couple different things, that may cause "one way audio". For example, it could be problem with the network, when network traffic between you and other party (or gateway) goes fine to you (so, you can hear), however it gets lost from you (that's why they cannot hear you). However, since it works with a speakerphone, it's not your case.

Another possible cause - bad handset or "curly cord". You may try to borrow a handset and cord from other phone, and see, if it fixes a problem.

Then it could be "human error". For example, if you activated a headset button, even though inbound audio will be heard on both, headset and handset, microphone circuit is completely switched to a headset port, and remote party will not hear you (or, if you have a headset connected, will hear only whatever picked by the microphone on the headset).

And worst case scenario - your phone is bad (for example, someone connected something bad into the handset or headset port, and burned circuit).

Mike / CCNP, CCVP, CCDP, CCSP
Headset Adapter Co.
www.headsetadapter.com

PS. In some cases headsets may not work due to insufficient power, and will require an additional power supply. However if phone is powered up and booted, it should work with a handset.

Posted on Oct 03, 2014

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Could be a bad hook switch on the phone if you plug a different phone in does it work as it should?

Posted on Jun 02, 2014

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Posted on Jan 02, 2017

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SOURCE: 7945g can't use power supply of 7940

You'll need to buy a another power supply unless you have power over Ethernet. The power supply for 7940G/7960G is CP-PWR-CUBE and for 7941G/7945G you'll need a CP-PWR-CUBE-3. Yes, I know, I just got one of those and it's a pain to configure it, but I got it working... ;-)

P.S. If you haven't notice, you will be dealing with a whole different thing, the configuration/settings will ALL (except for the dialplan file) different from the 7940G... Good Luck ;-)

Posted on Aug 03, 2009

  • 26 Answers

SOURCE: Cisco 7945G keeps rebooting after factory reset

If you used the traditional keypress sequence where you hold down the * key, reboot the phone, and then press the keys in sequence, you may be stuck in a boot loop. You might need to connect your phone to a network if your phone is trying to reach a TFTP server to fetch a firmware or config file update. If you need a power supply, you might try CiscoPowerCube.com they sell a cross compatible version of the CP-PWR-CUBE3 which includes the cord.

Posted on Dec 05, 2012

  • 26 Answers

SOURCE: How to upgrade to SIP Firmware on Cisco 7945G

This process should work for you http://www.cisco.com/en/US/products/hw/phones/ps379/products_tech_note09186a0080094584.shtml

Cisco Telephone Power Brick

Posted on Dec 06, 2012

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1 Answer

How to upgrade to SIP Firmware on Cisco 7945G


This process should work for you http://www.cisco.com/en/US/products/hw/phones/ps379/products_tech_note09186a0080094584.shtml

Cisco Telephone Power Brick

Sep 08, 2012 | Cisco 7945G IP Phone

1 Answer

My Cisco IP Phone 7945G keeps rebooting after I did a factory reset. Is there a way to fix this?


According to Cisco, when initiating a factory reset procedure certain information from the IP phone is erased while other information is reset to the factory default value, as shown in the list below:


Information Erased:
  • CTL File (Certificate Trust List)
  • LSC File (Locally Significant Certificate)
  • IP Phone Call History (Calls Received, Placed, Missed etc)
  • Phone application
Information Reset to Default:
  • User configuration settings (ring tone, screen brightness, sound levels etc)
  • Network configuration settings

t is highly advisable to follow the firmware upgrade procedure in a non-working environment to ensure other phones are not affected (in case of an accidental reboot), and to avoid the freshly factory reset ip phones obtaining the working environment's settings.


Please use the link below and follow the instruction http://www.firewall.cx/downloads/cisco-tools-a-applications/cisco-ip-phone-a-ata-firmware-downloads.html


Aug 28, 2012 | Cisco 7945G IP Phone

1 Answer

Cisco 7945G keeps rebooting after factory reset


If you used the traditional keypress sequence where you hold down the * key, reboot the phone, and then press the keys in sequence, you may be stuck in a boot loop. You might need to connect your phone to a network if your phone is trying to reach a TFTP server to fetch a firmware or config file update. If you need a power supply, you might try CiscoPowerCube.com they sell a cross compatible version of the CP-PWR-CUBE3 which includes the cord.

Aug 28, 2012 | Cisco 7945G IP Phone

1 Answer

How do you display caller name and not just telephone number


Caller ID (caller identification, CID), also called calling line identification (CLID) or calling number identification (CNID), is a telephone service, available in analog and digital phone systems and most Voice over Internet Protocol (VoIP) applications, that transmits a caller's number to the called party's telephone equipment during the ringing signal, or when the call is being set up but before the call is answered. Where available, caller ID can also provide a name associated with the calling telephone number. The information made available to the called party may be displayed on a telephone's display or on a separately attached device.

Apr 24, 2011 | Innovage Touch-panel Phone 1502084

1 Answer

Can call blocking be doen with a computer?


Depends on the software installed on the computer that "answers" the incoming telephone-call.
You could program it to a "silent" ring for certain telephone-numbers -- the caller hears the "ringing" sound, but you don't hear anything.

Dec 31, 2010 | Computers & Internet

2 Answers

Hello, my cisco ip phone does not start


Confirm if the Phone has power supply. and If it's connected to a POE switch confirm that it connects to the Switch port on the phone.

Oct 14, 2009 | Cisco Computers & Internet

2 Answers

7945g can't use power supply of 7940


You'll need to buy a another power supply unless you have power over Ethernet. The power supply for 7940G/7960G is CP-PWR-CUBE and for 7941G/7945G you'll need a CP-PWR-CUBE-3. Yes, I know, I just got one of those and it's a pain to configure it, but I got it working... ;-)

P.S. If you haven't notice, you will be dealing with a whole different thing, the configuration/settings will ALL (except for the dialplan file) different from the 7940G... Good Luck ;-)

Aug 02, 2009 | Cisco 7945G IP Phone

1 Answer

PIXMA MP780 will not receive fax with Verizon DSL connection. Before unit was ok with comcast cable, Note: I'm able to send fax. RBRANT


Solution: Contact local phone company to check the telephone wall jack for low ring voltage.

Ring-in Voltage Facsimile equipment?(fax machines), like other telephone anwering devices, require ring voltage at a telephone jack to answer automatically.? The ring voltage is one of the services provided by the local phone company.
  • Low ring-in voltage can cause short bursts of ring tones at the phone jack.
  • Callers may hear one or two ring back tones and then ringing will stop and nothing else will be heard.
  • Inside the home, the called party will hear a brief ring and then nothing else will be heard. If the telephone handset is lifted, the caller may be on the other end.
To check if the fax will not answer due to low ring-in voltage, do the following:
  1. Disconnect the fax at the telephone wall jack.

  2. If an answering machine is available, connect it directly to the telephone jack. If an answering machine is not available, connect a telephone to the telephone jack.

  3. Dial the fax line and see if the answering machine answers the call, listen for uncommon ring tones inside the home or check for similar symptoms as described above. If any of the above symptoms occur, please contact your local telephone company.

May 05, 2009 | Canon PIXMA MP780 All-In-One InkJet...

1 Answer

Outside caller hears themselves in an echo


Echo is usually caused by the transmit (speak) level on the unit being set too high.

1. First, try lowering the volume of the telephone. If you still hear an echo, adjust the volume of the headset itself.

2. The master transmit controls of the headset are the ABCD switch settings on the bottom of the base. A is the lowest and D is the highest setting.

3. You can fine tune this setting with the plus (+) and minus (-) buttons on the back of the charging base.

4. If this doesn't fix the echo, try moving the configuration dial on the left side of the charging base. The recommended setting for most phones is 1.

Jan 23, 2009 | Plantronics CS55 Wireless Headset

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