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4 – Appendices NET SatisFAXtion 8.7 Manual 181
4.1.11
29185–29311: Q.850 Cause Codes
These are error codes returned by the ISDN PRI circuit. For more information
on Q.850 cause codes, please see ITU-T publication Q.850, all “Q.850 de-
scriptions” provided below come from that document. All cause codes originate
from the TDM network and are passed through the gateway to IPFax.
4.1.11.1
Normal Class
29185 Cause 1, Unallocated (unassigned) number: The TDM network could
not connect the call because the number is not in service. Error type:
NON_RETRYABLE .
Q.850 description: This cause indicates that the called party cannot be reached
because, although the called party number is in a valid format, it is not currently
allocated (assigned).
29186 Cause 2, No route to specified transit network:
Q.850 description:
This cause indicates that the equipment sending this cause has received a re-
quest to route the call through a particular transit network which it does not
recognize. The equipment sending this cause does not recognize the transit
network either because the transit network does not exist or because that par-
ticular transit network, while it does exist, does not serve the equipment which
is sending this cause. Error type:
NON_RETRYABLE
.
29187 Cause 3, No route to destination: The TDM network did not know
how to route the call. Error type: NON_RETRYABLE .
Q.850 description: This cause indicates that the called party cannot be reached
because the network through which the call has been routed does not serve the
destination desired.
AudioCodes MediaPacks, Mediants, and TrunkPacks: These devices will return
a “no route to destination” if all available lines/channels are already in use. This
can also occur if no routing rule matches the requested call.
29188 Cause 4, Send special information tone:
Q.850 description: This
cause indicates that the called party cannot be reached for reasons that are of a
long term nature and that the special information tone should be returned to
the calling party. Error type:
NON_RETRYABLE
.
29189 Cause 5, Misdialled trunk prefix: Q.850 description: This cause indi-
cates the erroneous inclusion of a trunk prefix in the called party number. Error
type:
NON_RETRYABLE .
29190 Cause 6, Channel unacceptable: Q .850 description: This cause indi-
cates that the channel most recently identified is not acceptable to the sending
entity for use in this call. Error type:
NON_RETRYABLE .
29191 Cause 7, Call awarded and being delivered in an established chan -
nel: Q.850 description: This cause indicates that the user has been awarded
the incoming call, and that the incoming call is being connected to a channel al-