I am currently studying for a CCNA, but I had a great interest in VoIP technologies, and I would love to be able to practise this if possible, just for self learning and enjoyment. I currently have a 1780 Cisco router that states 'these slots are only for voice interface cards', albiet they are empty. This sparked my initial curiosity. After reading a lot of websites and even buying a Cisco self-learning book, I still am not sure where to start.
Basically, what is the minimum hardware requirements to get two Cisco VoIP phones to work over a LAN? Thats all...
I have a voice capable router (but no expansion card), I believe, but apart from that I am not sure where to start or what to do. Any advice for hardware, tutorials or even just 'get this, and then get this and try this' type of stuff would be greatly appreciated!
I am in the same position as you. I have been experimenting with Cisco VoIP for the past year or so and I have to say that Cisco offers a very vast array of VoIP solutions. I am not too familiar with the 1780 router, but in order to get a Call Manager Express (CME) system up and running you need to make sure that your IOS version supports it (if you do a show ver from the command prompt or a show flash: you will see the name of the IOS package, if it says IPVOICE it should contain Call Manager Express, some IOS's that are ADVENTERPRISE also contain CME). I am currently running two 1760-v routers with CME IOS's. The "V" after the model no. is a voice router w/ supports DSP modules which is used for transcoding between codecs. If you plan on putting in a voice card or VIC in your router you probably would want to make sure that it supports DSP modules, that is if you plan on having conversations between attached FXS phones (analog phones) and IP phones. I may be wrong on this, but I am pretty sure that routers that have a "V" after the model number it will natively support DSP modules. Routers like the 2600 series can support DSP modules with an NM-2V card.
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