Telos TWOx12 - Page 168

TELOS TWOX12 USER’S MANUAL
TECHNICAL DATA & TROUBLESHOOTING
CHAPTER 8 156
Cause No. 19 - No answer (No answer from user, user alerted)
This cause is used when the called user has provided an alerting indication, but not a connect
indication within a prescribed period of time (before timer T301 has expired).
Cause No. 20 – Subscriber absent
This cause is used when a mobile station has logged off, radio contact is not obtained with a
mobile station or a personal telecommunications user is temporarily not addressable at any
user-network interface.
Cause No. 21 - Call rejected
This cause indicates that the equipment sending this cause does not wish to accept this call,
although it could have accepted the call because the equipment sending this cause is neither
busy nor incompatible.
This cause may also be generated by the network, indicating that the call was cleared due to a
supplementary service constraint.
Cause No. 22 - Number changed
This cause is returned to a calling party when the called party number indicated by the calling
party is no longer assigned, The new called party number may optionally be included in the
diagnostic field. If a network does not support this cause, cause no: 1, unallocated
(unassigned) number shall be used.
Cause No. 26 – Non-selected user clearing
This cause indicates the user has not been awarded the incoming call.
Cause No. 27 – Destination out of order
This cause indicates that the destination indicated by the user cannot be reached because the
interface to the destination is not functioning correctly. The term "not functioning correctly"
indicates that a signal message was unable to be delivered to the remote party; e.g. a physical
layer or data link layer failure at the remote party, or user equipment off-line.
Cause No. 28 - Incorrect number (invalid number format, address incomplete)/Special
intercept announcement
This cause indicates that the called party cannot be reached because the called party number
is not in a valid format or is not complete.
or
This cause indicates the user should be returned a Special Intercept Announcement.
Cause No. 29 – Facility rejected/Special Intercept announcement: undefined code