Voice Systems and Accessories - Small Business

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Hello.What is the maximum number of simultaneous calls supported over a SIP trunk on a UC 520?I know that for a Cisco 2801 is 55 and for a Cisco 2901 is 100, but I could not find any information for the UC 520/540/560 platforms.Thanks in advance for ...

Here's the scenario - customer operates two different companies out of the same location. The calls come in on two different PSTN hunt groups, but they all will come straight into the AA. The AA menu will ask the user to select the company they are t...