User`s manual

U.S. Robotics I-modem Command Reference
Querying • Page 12-15
Service or
option not avail-
able, unspeci-
Þed
A Òservice or option not availableÓ event occurred that doesnÕt Þt any of the other
service or option-not-available descriptions.
Service or
option not
implemented,
unspeciÞed
A Òservice or option not implementedÓ event occurred that doesnÕt Þt any of the
other service or option not implemented descriptions.
Switching equip-
ment congestion
or B-channel
negotiation
Heavy trafÞc at the switch.
Temporary fail-
ure
The called device or network is not functioning, but should function shortly.
Unassigned
(unallocated)
number
The number you are trying to call has not been assigned to a device.
Unable to
Retrain
After several attempts, disturb-ances on the phone line prevented the devices
from retraining, and they could no longer transmit or receive data.
User alerting,
no answer
The call has been cleared because no valid CONNect message was received.
Disconnect
Reason Explanation