June 16, 2024

Network System

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

2 min read

How many telephones and listing figures can be configured on Cisco Unified Communications Manager Categorical by default?

Remedy: Zero!

Yes, by default, no ephones or directory numbers can sign-up. Just before performing anything at all else, the subsequent configuration is necessary:


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

This allow for up to 4 telephones to sign up / be configured and 8 directory quantities.

If you do not do this, the router will not allow ephones or ephone-dns to be designed. Here is an instance 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 optimum range of ephones and ephone-dns that can be configured is system dependent. Listed here is an instance of my router that can help 30 phones with up to 150 ephone-dns:

R1(config-telephony)#max-ephones ?

Utmost telephones to assistance

R1(config-telephony)#max-dn ?

Most listing numbers supported

Cisco have a great document demonstrating you how several ephones/dns are supported on certain platforms. Have a look in this article

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

(There are others, be sure to refer to the connection higher than for a entire record)

Cisco also endorse that you only permit the quantity of ephones and ephone-dns for the quantity you call for, not the greatest the system can help. The purpose is that when a ephone / ephone-dn is produced, it works by using up memory on the router. Really don’t just build them mainly because you can! Produce only what is essential.

To your achievement!

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