Questions

[singh-ashok]

What is the limit on the max no of phones we can connect to a CUCM 4x, CUCM 6x, CUCM 7x cluster ?

Is there any standout difference between CUCM 6x & CUCM 7x ? ( is Local Route Group the answer ? )

Can we integrate Unity 5 with more than one CUCM clusters ?

Any help would be greatly appreciated.

Ashok.

[Jaime Valencia · Accepted solution]

Unified CM Platform Capacity Planning

•Each cluster can support a maximum of  30,000 unsecured SCCP or SIP phones.

•Each cluster can support a maximum of  27,000 secured SCCP or SIP phones.

http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/srnd/7x/callpros.html#wp1043871

I believe they haven't changed but you can review the SRND for each version to confirm.

All the changes between versions are in the RN

New and Changed Information for Cisco Unified Communications Manager  Release 7.0(1)

http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/rel_notes/7_0_1/cucm-rel_notes-701.html#wp580948

Yes, as long as you have enough ports you can integrate so other clusters. Can't recall the exact number of clusters was the limit.

HTH

java

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[singh-ashok]

Rob & Java,

Thanks to both of you.Appreciate your help. Have a nice day.

Regards,

Ashok...

[Rob Huffman · Accepted solution]

Hi Ashok,

Just to add a note to the great info from my friend Java (+5 Java-man)

Combination Limitations for Multiple Phone System Integrations

Cisco Unity 5.0 supports multiple simultaneous phone system integrations in any combination with the following limitations:

•The number of simultaneous phone system integrations is limited only by the number of licensed voice messaging ports on the Cisco Unity server.

•Only one integration with a circuit-switched phone system through voice cards is supported on the Cisco Unity server.

For example, Cisco Unity can be integrated with the following phone systems at one time (a total of 25 phone system integrations):

•Six circuit-switched phone systems through PIMG/TIMG units

•Six Cisco Unified Communications Manager phone systems through Skinny Call Control Protocol (SCCP)

•Six QSIG-enabled phone systems with Cisco ISR voice gateway

•One circuit-switched phone system through voice cards

•Six Cisco Unified Communications Manager phone systems through SIP trunk

from this good doc;

Multiple Phone System Integration Guide for Cisco Unity 5.0

http://www.cisco.com/en/US/docs/voice_ip_comm/unity/5x/integration/multiple_integration/guide/cuintmultiple.html

Cheers!

Rob

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