By default, the device features pre-recorded voice message phrases and music to be played on hold. Message playback corresponds to a specific event; the table below contains the list of messages and their correspondence to events. 

Table G1 — MOH messages and events

Name

Meaning

Event

TRUNK_BUSY

'Direction is overloaded'

No free channels for outgoing direction

Outgoing channels are blocked or inoperable

When Q.850 cause = 34 is received

NUMBER_FAIL

'Invalid number is dialled'

When non-existent prefix is dialled

When Q.850 cause = 3, 28 is received

ACCS_DENIED_TEMP

'Number is temporarily unavailable'

When unregisteres subscriber is dialled

When Q.850 cause = 27 is received

ACCESS_RESTRICT

'This type of communication is missing from the service list for your phone unit'

Incoming communication restriction for a subscriber

Call restriction by access categories

When Q.850 cause = 21 is received

USER_UNALLOCATED

'Subscriber unit is not conncted to PBX'

For calls to 'modifier' type prefix

When Q.850 cause = 1 is received

USER_CHANGE

'Subscriber has switched the number'

When Q.850 cause = 22 is received

MOH

Musica oh hold

When subscriber has been put on hold

Voice message playback management is located in the trunk group configuration and PBX profile settings for subscribers. 

MOH message playback is unconditional and does not depend on the settings.