Polycom ReadiVoice Provisioning Manual page 50

ReadiVoice Provisioning Guide
40
If your system uses fixed translation numbers, each time you add or edit a
subscriber account, the ReadiVoice system validates the Subscriber External
ID field based on the following rules:
The external ID must be unique. That is, no two subscribers can have the
1
same external ID.
If the system's Translation Number Type setting is Fixed Translation
2
Number, the external ID must contain exactly the number of digits
specified in the Trans DNIS Length setting for the bridges.
If the system's Translation Number Type setting is Fixed Translation
3
Number with 3-digit code, the external ID must contain exactly three
fewer digits than the number specified in the the Trans DNIS Length
setting for the bridges.
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