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

How several phones and directory figures can be configured on Cisco Unified Communications Manager Specific by default?

Response: Zero!

Yes, by default, no ephones or directory figures can register. Prior to executing just about anything else, the following configuration is demanded:


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

This allow up to 4 telephones to register / be configured and 8 listing quantities.

If you will not do this, the router will not permit ephones or ephone-dns to be produced. In this article is an example of what would take place:

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

The greatest number of ephones and ephone-dns that can be configured is system dependent. Here is an case in point of my router that can assist 30 phones with up to 150 ephone-dns:

R1(config-telephony)#max-ephones ?

Highest telephones to aid

R1(config-telephony)#max-dn ?

Highest listing figures supported

Cisco have a excellent document displaying you how a lot of ephones/dns are supported on precise platforms. Have a glance right here

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

(There are some others, please refer to the backlink higher than for a complete checklist)

Cisco also suggest that you only permit the number of ephones and ephone-dns for the quantity you need, not the optimum the platform can help. The explanation is that when a ephone / ephone-dn is made, it utilizes up memory on the router. Will not just develop them due to the fact you can! Create only what is essential.

To your accomplishment!