Hi there
The number of phones depends on the model of router which you have. You can get all the required details from the below link
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucme/requirements/guide/cme115spc.pdf
Details about the CME licensing-
When you purchase a Cisco Unified CME permanent license, the permanent license is installed on the device when the product is shipped to you. A permanent license never expires and you will gain access to that particular feature set for the lifetime of the device across all IOS release. If you purchase a permanent license for Cisco Unified CME , you do not have to go through the Evaluation Right to Use and Right To Use (RTU) licensing processes for using the features. If you want to purchase a CME-SRST license for your existing device, you have to go through the RTU licensing process for using the features. There is no change in the existing process for purchasing the license.
The Cisco Unified CME permanent license is available in the form of an XML cme-locked3 file. You should get the XML file and load it in the flash memory of the device. To install the permanent license from the command prompt, use the license install flash0:cme-locked3 command. The cme-locked3 is the xml file of the license.
Smartnet 8x5xnbd is your support. 8x5xNBD indicates that a technical support engineer is available 24x7 and advance hardware replacement is available 8 hours per day (delivering the replacement hardware during normal business hours only), 5 days a week, with next business day delivery.
https://www.cisco.com/web/partners/services/promos/accelerate/downloads/Cisco_SMARTnet_SG.pdf
Regarding Voice VLAN, its always good practice and Cisco recommendation to configure switches with both data and voice as it makes it easier if you decide moving forward and do want to daisy chain a PC off the phones.
Usually, IP phones sit next to a computer on the same desk. They require the same UTP cables as computers and also use Ethernet. If we want to connect them to a switch, we have two options.
You could connect the computer and IP phone using two different cables:
This will work but it has some disadvantages:
- You need to install a new cable from the switchport to the IP phone.
- You will lose a switchport for the IP phone.
To solve this, most IP phones (including Cisco) have a three port switch inside of the IP phone:
- One port connects to the switch.
- One port connects to the computer.
- One (internal) port connects to the phone.
This allows us to connect the IP phone and computer like this:
You probably want to separate the data from the computer and IP phone. This is something we can do with voice VLANs.
The computer will be in a data VLAN, the IP phone will be in the voice VLAN. It will look like this:
Behind the scenes, we have a trunk between our switch and IP phone. The port on the IP phone that connects to the computer is an access port. The IP phone will forward all traffic from the computer to the switch untagged, traffic from the IP phone itself will be tagged. The only two VLANs that are allowed though, are the access and voice VLAN.
https://networklessons.com/cisco/ccna-routing-switching-icnd1-100-105/voice-vlan
Hope this helps
Cheers
Rath!
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