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Centralised multisite topology

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Hi,

 

I have to configure a centralised multisite topology and I am a bit confused about some stuff.

 

The head office has a call manager 7 BE with unity connection.

 

The remote site has call manager express running right now, however I would like to use the cme in srst mode instead for that site. The call manager express installation will no longer be require and I would like all the phones from there to connect to the main site.

 

This is the confusing part:

 

1. Will the voice gateway at the head office need to be configured with h323? or mgcp will work. If h323 please explain, i saw it mantioned on a cisco press book but no explanation why.

2. The voice gateway at the head office needs to be configured for t1 pri with caller id support, will this be a better to configure h323 instead.

 

I am very weak when it comes to the voice protocols...your guidance will be greatly appreciated.

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Hi,

 

I have to configure a centralised multisite topology and I am a bit confused about some stuff.

 

The head office has a call manager 7 BE with unity connection.

 

The remote site has call manager express running right now, however I would like to use the cme in srst mode instead for that site. The call manager express installation will no longer be require and I would like all the phones from there to connect to the main site.

 

This is the confusing part:

 

1. Will the voice gateway at the head office need to be configured with h323? or mgcp will work. If h323 please explain, i saw it mantioned on a cisco press book but no explanation why.

2. The voice gateway at the head office needs to be configured for t1 pri with caller id support, will this be a better to configure h323 instead.

 

I am very weak when it comes to the voice protocols...your guidance will be greatly appreciated.

 

1. MGCP will just fine.

2. There should be no problems with caller-id on T1 interface when it uses CAS signaling. With ISDN signaling you'll have to use PRI Backhauling, not sure the caller-id will work this way.

Edited by Andrew S.

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Hi,

 

1. Since you are not going to use the CME.. MGCP will satisfy your requirement..

 

2. You dont need to configure T1 PRI.. To connect to the HQ.. configure a T1 CAS and add this gateway on the HQ CUCM as a MGCP gateway..

 

 

(HQ CUCM--->HQGW)--------T1 CAS (WAN)--------->(Remote GW----?Ip Phones)

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Hi,

 

1. Since you are not going to use the CME.. MGCP will satisfy your requirement..

 

2. You dont need to configure T1 PRI.. To connect to the HQ.. configure a T1 CAS and add this gateway on the HQ CUCM as a MGCP gateway..

 

 

(HQ CUCM--->HQGW)--------T1 CAS (WAN)--------->(Remote GW----?Ip Phones)

 

 

Thanks..

 

I have another question is cme in srst mode a difficult configuration to do if I am using h323? Caller id is enabled for the t1 pri and fxo ports so i have to use h323.

 

I saw the configs and more or less understood what i have to do but is there alot of problems during the process?

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