Technical Manual
U-SYS MRS6100 Media Resource Server
Chapter 5 MGCP and SIP
Huawei Technologies Proprietary
5-10
Table 5-5 MGCP response codes
Response
code
Meaning
100
The transaction is currently being processed. An actual completion
message will follow on later.
200 The requested transaction is already processed normally.
250 The connection is already deleted.
400 The transaction can not be processed due to a transient error.
401 The phone is already off hook.
402 The phone is already on hook.
403
The transaction can not be processed because the endpoint does
not have sufficient resources at this time.
404 Insufficient bandwidth at this time.
500
The transaction can not be processed because the endpoint is
unknown.
501
The transaction can not be processed, because the endpoint is not
ready.
502
The transaction can not be processed because the endpoint does
not have sufficient resources.
510
The transaction can not be processed because a protocol error is
detected.
511
The transaction can not be processed because the command
contains an unrecognized extension name.
512
The transaction can not be processed because the gateway is not
equipped to detect one of the requested events.
513
The transaction can not be processed because the gateway is not
equipped to generate one of the requested signals.
514
The transaction can not be processed because the gateway
cannot send the specified announcement.
515
The transaction is related with an incorrect connection identifier
(may be already deleted).
516 The transaction is related with an unknown call identifier.
517 Unsupported or invalid mode.
518 Unsupported or unknown package.
519 Endpoint does not have a digit map.
520
The transaction can not be processed because the endpoint is
being restarted.
521 Endpoint is already redirected to another call agent.
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