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Page 5-2 NDA-24233 Issue 2
Factors of Disconnections
Number Message Factors for Disconnection Countermeasure (Example) Location
# 50 Requested facility
not subscribed
Procedure for a requested facility is
not taken.
Contact a retailer or a service
center.
LN
# 57 Bearer capability
not authorized
Unauthorized transmission
capability was requested.
Contact a retailer or a service
center.
LN
# 58 Bearer capability
not presently
available
Transmission capability currently
not available for use.
Contact a retailer or a service
center.
LN
# 63 Service or option
not available
Report that other services cannot be
used.
Contact a retailer or a service
center.
LN
# 65 Bearer capability
not implemented
Requested transmission capability
is not supported.
Contact a retailer or a service
center.
# 66 This service is
currently not
available
Requested channel class is not
supported.
Contact a retailer or a service
center.
RU/RN/
LN
# 69 Requested facility
not implemented
Requested additional service is not
supported.
Contact a retailer or a service
center.
# 70 A connection could
not be made
Limited digital transmission
capability among requested
transmission capabilities is
supported.
Contact a retailer or a service
center.
LU/LN
# 79 Service or option
not implemented
Report that a service cannot be
provided.
After checking a remote
number, retry.
# 81 Invalid call
reference value
Different dial number from the
currently used number is used.
After checking a remote
number, retry.
LN
# 82 Please dial again Invalid channel number is used. After checking a remote
number, retry.
LN
# 83 A connection could
not be made
A different number from the interrupt
call discriminating number is used.
After checking a remote
number, retry.
LN
# 84 A connection could
not be made
The interrupt call discriminating
number currently in use is used.
After checking a remote
number, retry.
LN
# 85 A connection could
not be made
Call discriminating number is not
used.
After checking a remote
number, retry.
RU
# 86 A connection could
not be made
Interrupt call has already been
disconnected.
After checking a remote
number, retry.
TN/ LN
# 88 Incompatible
destination
Attribute of a terminal unit does not
match.
After checking a remote
number, retry.
LN
# 91 No available line for
use
Format of a transit network is not
normal.
After checking a remote
number, retry.
# 95 A connection could
not be made
Report of other invalid messages.
# 96 Mandatory
information element
is missing
Required information element is in
short.
Contact a retailer or a service
center.
LU/ LN
# 97 A connection could
not be made
Undefined or not-provided message
is received.
Contact a retailer or a service
center.
LU/ LN
# 98 A connection could
not be made
Message mismatch. Contact a retailer or a service
center.
LU/ LN
# 99 A connection could
not be made
Information element is undefined. Contact a retailer or a service
center.
LU/ LN
# 100 Invalid information
element contents
The contents of information element
is invalid.
Contact a retailer or a service
center.
LU/LN
# 101 Message not
compatible with call
state
Received message and a call status
mismatch.
After checking a remote
number, retry.
LU/LN
# 102 Recovery on timer
expiry
Restoration due to an expiration of
timer.
After checking a remote
number, retry.
LU/LN