Cisco CCNA Voice Certification Exam Tutorial – Default Max Ephone and Ephone-dn and Configurations

How lots of telephones and listing quantities can be configured on Cisco Unified Communications Supervisor Convey by default?

Respond to: Zero!

Indeed, by default, no ephones or directory figures can register. Before undertaking anything else, the following configuration is required:


Router#configure terminal
Router(config-telephony)#max-ephones 4
Router(config-telephony)#max-dn 8

This permit up to 4 telephones to sign-up / be configured and 8 directory numbers.

If you never do this, the router will not enable ephones or ephone-dns to be developed. Listed here is an illustration of what would happen:

R1(config)#ephone 1
ephone tag 1 exceeds max-ephones
R1(config)#ephone-dn 1
dn 1 exceeds max-dn

The maximum selection of ephones and ephone-dns that can be configured is system dependent. Below is an example of my router that can assistance 30 telephones with up to 150 ephone-dns:

R1(config-telephony)#max-ephones ?

Most phones to aid

R1(config-telephony)#max-dn ?

Highest directory quantities supported

Cisco have a excellent doc showing you how a lot of ephones/dns are supported on precise platforms. Have a glimpse right here

As an illustration, working with CME model 4.3:
The 2801 supports 25 telephones and 120 ephone-dns
The 2811 supports 35 phones and 144 ephone-dns
The 2821 supports 50 phones and 192 ephone-dns
The 3845 supports 250 phones and 720 ephone-dns

(There are other folks, make sure you refer to the backlink previously mentioned for a complete listing)

Cisco also advise that you only empower the quantity of ephones and ephone-dns for the amount you have to have, not the utmost the system can aid. The explanation is that when a ephone / ephone-dn is created, it utilizes up memory on the router. Never just create them due to the fact you can! Produce only what is demanded.

To your results!

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