What is the difference between EPhone-DN and EPhone in Cisco IP Phones?

EPhone-DN

--> An Ephone-DN or Ethernet Phone Directory Number represents a phone line.

--> A number will be assigned to EPhone-DN. Users then will be able to use this number to call another.

--> EPhone-DN can be Single Line or Dual Line.

--> By using a Single-Line EPhone-DN, the user can place or receive a single simultaneous call.

--> If a call is in progress on this line and a new call arrives, the line rings busy.

--> By using a Dual-Line, the user can place or receive two simultaneous calls.

--> If a call is in progress on the line and a second arrives, the line does not ring busy. It sounds normal and the user can take the call.

--> In general, we configure user lines in Dual-Line.



EPhone

--> we call the Ephones as Ethernet Phone. In Cisco IOS, IP Phone is represented as EPhone.

--> For every IP Phone in the network, we will have an Ephone in the CME Router configuration.

--> Every IP Phone is uniquely identified by using MAC Address in CME Router.

--> We need to Bind MAC Address to Each EPhone when we are configuring IP Phones in CME Router.

--> The MAC address of an IP Phone can be found in 3 locations,

i) On the label at the back of the IP Phone

ii) On the packing box of the IP Phone

iii) In the configuration menu

--> The bottom buttons are associated with functions such as hanging up, transferring, creating a conference, etc.

--> The right buttons are associated with lines.If the extension has multiple lines, we assign multiple buttons to multiple lines.

Configuration: 

CME (config) # ephone-dn 1 dual-line
CME (config-ephone-dn) #number 1001

CME (config) # ephone-dn 2 dual-line
CME (config-ephone-dn) #number 1002


CME (config) #ephone 1
CME (config-ephone) # mac-address 0011.5123.7121
CME (config-ephone) #button 1:1

CME (config) #ephone 2
CME (config-ephone) # mac-address 0050.5000.0009
CME (config-ephone) #button 2:2

Note: The first "1" corresponds to button 1 of the IP Phone. The second "1" corresponds to the line DN 1 that we created.




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