How does Panagon IDM Desktop communicates with FileNet Image server.

Answer : IDM desktop uses a NCH (port) to locate the object from doc services and uses a COR (port) 32769/tcp to transfer them.

How to use an Image Services Server on a Different Subnet?

If you will be accessing an Image Services server on a subnet that is different from the one your workstation is on, add an entry like the following to the hosts or lmhosts file:
xxx.xxx.xxx.xxx --nch-server
Where:
xxx.xxx.xxx.xxx is the IP address of the Image Services server
domainis the Image Services server domain name
organization is the organization name selected for the Image Services server during the initial installation.(Typically the organization is filenet.)

For example, your entry might look like this:
10.1.20.123 mysystem mysystem-filenet-nch-server
Note that domain names are limited to lowercase and alphanumeric characters.
For more information about Image Services access, contact your Image Services System
Administrator

How to 'ping' an Image Server from a workstation?

Solution: Suppose you are using an Image Server say 'ImageSvr' and want to 'Ping' it. It can not be done by using normal 'ping' command, instead use following syntax to achieve this :

ImageSvr-filenet-nch-server

Where ImageSvr = Name of Image Server Repository
filenet = Name of domain
nch = Network clearing house