Altigen ACM 6.7 Administrator's Manual page 176

Configuring Virtual Board HMCP
The IP extension Home Media Server ID should be assigned to "00" by default. You do
not need to change this number since both Softswitch and HMCP Media server are in the
ID "00".
Scenario 2: Single Standalone HMCP Media Server
For 200 to 1,000 users without an extensive amount of recording resources, fewer than
200 concurrent recording sessions, you may deploy a stand-alone HMCP Media server as
shown below.
The Home Media Server ID should be changed to "01" for all IP extensions, assuming
HMCP Media server is using ID 01.
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MAXCS ACM 6.7 Administration Manual