The Ajax Corporation is designing an IP telephony network using Cisco MCS 7845 Series servers, each one capable of supporting 7500 devices. The design must meet these requirements: be cost-effective…

The correct answer is B. three Cisco Unified Communications Manager servers. The MCS 7845 supports up to 7500 devices per server. To support 7500 phones with minimal redundancy using CUCM clustering, you need: 1 Publisher (handles database writes and administration, not primary call processing load) and 2 Subscribers (one primary subscriber handles the…

Cisco Unified Communications Manager (CUCM)

Question

The Ajax Corporation is designing an IP telephony network using Cisco MCS 7845 Series servers, each one capable of supporting 7500 devices. The design must meet these requirements:

be cost-effective support up to 7500 phones provide a minimal level of redundancy Which configuration will meet Ajax Corporation needs?

Options

Atwo Cisco Unified Communications Manager servers:
Bthree Cisco Unified Communications Manager servers:
Cfour Cisco Unified Communications Manager servers:
Dfive Cisco Unified Communications Manager servers

How the community answered

(63 responses)

A
17% (11)
B
71% (45)
C
3% (2)
D
8% (5)

Explanation

The MCS 7845 supports up to 7500 devices per server. To support 7500 phones with minimal redundancy using CUCM clustering, you need: 1 Publisher (handles database writes and administration, not primary call processing load) and 2 Subscribers (one primary subscriber handles the 7500 phones; a second subscriber provides redundancy so phones can re-register if the first subscriber fails). This gives a total of 3 servers (answer B). A two-server setup (publisher + one subscriber) provides no real subscriber redundancy. Four or five servers would be over-engineered and not cost-effective for only 7500 phones.

Topics

#cluster design#redundancy#server sizing#MCS 7845

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