admin- Posted on
Cisco CCNA Voice Certification Exam Tutorial – Default Max Ephone and Ephone-dn and Configurations
What number of telephones and listing numbers will be configured on Cisco Unified Communications Supervisor Categorical by default?
Reply: Zero!
Sure, by default, no ephones or listing numbers can register. Earlier than doing the rest, the next configuration is required:
Router>allow
Router#configure terminal
Router(config)#telephony-service
Router(config-telephony)#max-ephones 4
Router(config-telephony)#max-dn 8
This permit as much as 4 telephones to register / be configured and eight listing numbers.
For those who do not do that, the router is not going to permit ephones or ephone-dns to be created. Right here is an instance of what would occur:
R1(config)#ephone 1
ephone tag 1 exceeds max-ephones 0
R1(config)#ephone-dn 1
dn 1 exceeds max-dn 0
The utmost variety of ephones and ephone-dns that may be configured is platform dependent. Right here is an instance of my router that may assist 30 telephones with as much as 150 ephone-dns:
R1(config-telephony)#max-ephones ?
Most telephones to assist
R1(config-telephony)#max-dn ?
Most listing numbers supported
Cisco have an excellent doc exhibiting you what number of ephones/dns are supported on particular platforms. Take a look here
For example, utilizing CME model 4.3:
The 2801 helps 25 telephones and 120 ephone-dns
The 2811 helps 35 telephones and 144 ephone-dns
The 2821 helps 50 telephones and 192 ephone-dns
The 3845 helps 250 telephones and 720 ephone-dns
(There are others, please check with the hyperlink above for a full listing)
Cisco additionally advocate that you simply solely allow the variety of ephones and ephone-dns for the quantity you require, not the utmost the platform can assist. The reason being that when a ephone / ephone-dn is created, it makes use of up reminiscence on the router. Do not simply create them as a result of you may! Create solely what’s required.
To your success!