Polycom VVX 1500 C - Manual (Page 19)

Configuring Cisco Unified Communications Manager
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33. In the Display (Internal Caller ID) text box, enter an appropriate caller
ID.
34. In the ASCII Display (Internal Caller ID) text box, enter an appropriate
caller ID.
35. In the Maximum Number of Calls text box, enter an appropriate value
for your system.
Currently the maximum supported value is 6.
36. In the Busy Trigger text box, enter an appropriate value for your system.
Currently the maximum supported value is 6.
37. Click the Save button.
In the status bar near the top of the page, “Update Successful” appears.
You have completed the configuration of Cisco Unified Communications
Manager.