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Questions tagged [cisco-7900-ip-phones]

For questions about Cisco 7900 Series IP Telephones.

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33 views

Cisco 7960G recieving wrong CTL file

It appears that our Cisco phones are receiving the wrong CTL file from the CUCM (which we do not control). The phones do go through the proper boot cycle. Everything in the configuration is correct, ...
2
votes
2answers
916 views

Changing ethernet wiring for Cisco pre-standard PoE

I have a set of 7912G IP Phones, which only accept Cisco pre-standard PoE. To save myself buying a Cisco switch, is it acceptable practice to change the wiring of my ethernet cables slightly and use a ...
1
vote
1answer
76 views

Cisco IP phone issue

This is a weird one I have 2 7960 ip phones using cme with a 2811 router, they worked flawlessly, then one decided to stop picking up so i opened it to re attach the handset spring. Then I connected ...
0
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1answer
1k views

“Protocol Application Invalid” in CISCO IP PHONE 7940!

I have a boot issue in Cisco IP Phone "Protocol Application Invalid." So I want to update my firmware. I made my PC as TFTP and DHCP Server and connected my PC and IP phone in same vlan, but it is ...
3
votes
1answer
473 views

Call is disconnected after huntstopped to another phone

We've been having an issue at the office with our Cisco CME. Here's the situation. Phone A (outside line) dials into the main line and after ~three rings the call is huntstopped to four other phones. ...
2
votes
2answers
339 views

How do I diagnose a VoIP issue on a Cisco 2811?

Background Our shop consists of approximately 10~12 Cisco IP phones which then connect to their respective workstations. Each phone is connected to the only switch in the shop which is a Cisco 2950 ...
1
vote
1answer
50 views

Smart switching calls in a company phone calls

We use VoIP phones in our company. Some people calls and each one connected to first free operator, and each people calls us once a week, we need one more option to make better experience for our ...
1
vote
1answer
2k views

How to Ping from a Cisco IP Phone 7945G?

I am trying to figure out if there is a way to ping from a Cisco IP Phone? Specifically a 7945G running SCCP45.9-4-2SR1-1S ? I have successfully gained SSH access to the CLI of the phone, however I ...
2
votes
2answers
2k views

Switchport security best practises for Cisco IP Phones (Not subjective)

I am having some trouble figuring out what the most secure method is to secure a Cisco IP Phone. I can't find information on how to properly secure the Link between a switchport and a Cisco IP Phone, ...
3
votes
1answer
471 views

Problem with IP phones after ISP failover change

I've ran into a strange problem at one of my clients. They use ShoreTel Sky cloud IP telephony service and use Cisco 7960 IP phones hooked up to an ASA 5520. The configuration is done through IP SLA ...
2
votes
1answer
522 views

Calls Dropping, Phone Line Missing, Caller ID Not Functional on Cisco 2811 CME

The Cisco 2811 at work employs approximately 10~12 phones. None of the phones are displaying caller id though every line is configured for it. voice-port 0/0/0 connection plar opx 2000 caller-id ...
6
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2answers
2k views

Cisco IP Phone 7941 Never Asks for TFTP files?

I've been reading and googling for the past week trying to wrap my head around the Cisco IP Phone TFTP upgrade process. The effort has been to try and make a Cisco 7941G work with Asterisk. This ...
7
votes
1answer
7k views

Auto-QOS configuration for Cisco network

I have a network with Cisco switches, Cisco IP Phones and video traffic. I want to add QoS markers to my traffic but I don't want to do it manually. Ideally I want to use Cisco's auto QOS features ...
6
votes
3answers
13k views

Cisco IP Phone 7900 Series - Auth Fail on boot

I have several hundred Cisco 7900 series IP phones, (7911, 7942, and 7962 models) that have been sitting on the shelf as replacement stock for several years. Now as we deploy them, we are ...