Hi, I would like to verify my understanding for Cross-Server Sign-in functionality: Let's say we have two clusters as follows: Cluster_A Pilot: 1234 UserA Cluster_B Pilot: 5678 UserB My understanding is that the purpose of cross-server sign-in is that  : when UserA dials the pilot number  for Cluster_B (5678), he would be be able to listen to his messages. Likewise, when UserB dials the pilot number for Cluster_A (5678), he would be able to listen to his messages. Is that correct? If so, in what case would a User have a need to dial the pilot number of a cluster that he does not belong to?  i.e. why would UserA ever call 5678 If not, can you please explain what benefit cross-server sign-in provides and how it's used. Thanks James ... View more

I am trying to undertand the function of CMG field when we create a Route List i.e what impact does the RL CMG have on the call path. My example: VM Route Pattern: 408-123-4567 CUC_RL with CMG_Default CUC_RG which contains following two SIP Trunks Trunk_A (with DP_A which contains CMG_DC01) Trunk_B (with DP_B which contians CMG_DC02) My understanding is that with this configuration, under normal situation, call path will be via the primary UCM in CMG_DC01. In case Trunk_A is down, the path will be via Trunk_B which will use the primary UCM in CMG_DC02. Am I correct?  And if so, what role did the CMG in RL play? Thanks James ... View more

Hi, Does it make a difference whether you have TrunkA and TrunkB both in the same RG COMPARED to each Trunk in it's own RG. I am trying to find this out cuz I will have two SIP Trunks going from CUCM cluster to a Unity Connection Cluster.  Would it make a difference whether it's configured one way or another?   Thanks Jaames ... View more

Hi, I am a bit confused about what cross-server logon offers when multiple unity connection locations (each with it's own phone system) are configured into an intralink site.  Let's say we have two clusters: UCxN_ClusterA in Chicago (VM Pilot:123) UCxN_ClusterB in Florida  (VM Pilot:456) My understanding is that with cross-server logon, when UCxN_ClusterA user is in Florida, he can dial 123 from his ip phone and he will be connected to his UCxN_ClusterA taken to his voicemail.  Correct?  But wouldn't that happen anyways whether cross-server logon is configured or not? Thanks James ... View more

Hi, When clustering Unity Connection over the WAN, what are the best practices as far as vlans are concerned?  Can each server (in it's own data center) be in a separate vlan?  Or should it be the same vlan in both data centers? Also, what is recommended as far as Unity Connection vlan placement is concerned when  deploying Unified Messaging?  Should Unity Connection be placed in the same vlan as CUCM or in the Exchange Vlan? Thanks James ... View more

Hi, I am have a new CUCM cluster with 30K users.  I also have 2 new Unity Connection clusters with 20K and 10K users to support the 30K CUCM users. Are there any best practices/considerations on how the CUCM users should be divided between two connection clusters. Thanks James ... View more

Hi, Is there a document/link that I can reference which shows how ports on Unity Connection should be assigned as a general rule.  For example, if I have a total of 200 vm ports available on the connection cluster, how many should be dedicated to  answering calls, mwi, and  message notification.  And which ports can be shared between these roles?  For instance, can answer ports also be used for mwi, and messaging notification? Thanks James ... View more

Hi, Where do I find out in Unity Connection 8.x whether I have the restriced or unrestriced version installed?  I checked under various places in OS Adminstration, but did not see anything?  Thanks James ... View more