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CHAPTER 3: FRONT PANEL FEATURE ACCESS
The Home Display
The 7500 displays call status and configuration information whenever it is not involved in setting
up or ending a call, and its display is not being used to select other actions. The (Home) display shows
the fundamental configuration of the 7500 which depends on what hardware and software options are
selected. The 7500's hardware options are described in detail in the REFERENCE chapter.
The (Home) display also provides the overall status of the unit, indicated by one of the following 12
terms (see Table A):
1.
[ TEST ] means that a local loopback test, remote loopback test, or remote loopback self-test is in
progress.
2.
[ DOWN ] means that no link exists between the 7500 and the network. This may mean that the
cords are disconnected, or that there is a loss of communication between the 7500 and the
network. If this message appears, you should contact your system administrator.
3.
[ NAIL ] means that data is permanently being transferred to or from a B-channel without use of
signaling either to or from the network. The network must be administered properly for the
data path to be established.
4.
[ PVC ] means that a packet switched permanent virtual circuit (PVC) has been established.
5.
[ ORIG ] means that a data call has been dialed but not yet connected. If this status persists, contact
your system administrator.
6.
[ DISC ] means a dialed call is being disconnected. If this status persists, contact your system
administrator.
7.
[ RING ] means that there is an incoming call but the 7500 is not answering.
8.
[ DATA ] means that a dialed-up call is in progress.
9.
[ PERM ] means the network has established a permanent circuit switched call.
10. [ OOS ] (Out of Service ) means that the network has temporarily placed the 7500 in a
maintenance mode.
11. [ RSTD ] (Restricted Service) means that there is no data call in progress and your 7500 has been
programmed with an incorrect SPID. You will receive this indication of incorrect SPID only if
you have subscribed to restricted service.
12. [ IDLE ] means that there is no data call in progress.
In some cases, it may be possible for more than one of these conditions to occur at the same time.
For example, you could perform a remote loopback test while you have a data call in progress. In the
cases where more than one state at a time could occur, the 7500 will display the most important or
unusual information. The order of priority of the messages is TEST, DOWN, NAIL, PVC, ORIG, DISC,
RING, DATA, PERM, OOS, RSTD, and IDLE. In the example given above, the word TEST would
appear on the display.
Table A: (Home) Display Terms shows the messages that could appear on your (Home) display.
Where the word "status" appears in the table, one of the 12 status terms defined above will appear on
the display.
12
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