External Ringer for VOIP Phone

[junior.beatty]

I have external ringers connected to VG224's for VOIP phones in our shops.  I have them configured and they work as they should for a while, but after a month or two it appears to blow up the port on the VG it is attached to.  I am thinking it might have to do with resistance of the bells, but since I am not an electrician I am not sure.  The ringer is a Premier PT-102 bell and per the description is 1000/2650 Ohm.  Has anybody experienced problem with external ringers blowing up VG ports.  Or is there any alternatives to the analog ringers that is designed to work with the Cisco VOIP phones.  Thanks for any info anybody can supply.

[Chris Deren]

I highly recommad IP based ringers, etc from Algo Solutions.

http://www.algosolutions.com

Chris

[junior.beatty]

I did get one of the Algo 8180 SIP Audio Alerters and it works great as an external ringer.  Also since it has the capability of paging, we are trying to get it configured to use with our IPCelerate paging solution.  Does anybody have any thoughts or ideas how to accomplish this.  I can get it to page using a direct extension to the Algo device, but can not get it to receive pages from IPCelerate.  Any help would be appreciated.

[Brian Meade]

If you have it added as a SIP device in CUCM, you just need to add it as an Overhead Number on the i.Cast zone in IPSession.

There's a few other options as well such as using multicast.  Take a look at this doc- http://www.cyberdata.net/support/server/documentation/930550A_IP_SESSION_CYBERDATA_IP_ENDPOINTS.pdf

[Brian Meade]

You can try doing some impedance matching- http://www.cisco.com/c/en/us/support/docs/voice/ip-telephony-voice-over-ip-voip/64282-impedance-choice.html

Edit:  Also, the VG224 only support 600 ohms of total loop resistance - http://www.cisco.com/c/en/us/products/collateral/unified-communications/vg224-voice-gateway/product_data_sheet09186a00801d87f6.pdf