Specifications

166 IBM Voice Over Frame Relay Perform Guide
The calling station must be able to terminate the call without injecting any noise
over the line. Disconnecting the handset may be the easiest way to terminate the
call, but a silent termination from a transmission test device may provide a more
accurate reading. Instead of using the telephone instrument, a terminating plug
can be used; this plug can be made with a 600W resistor in series with a 2.14mF
capacitor.
The test device sends a test signal to the PBX and measures the level of test
signal reflected back. If the resulting ERL reading is above 45, a proper
connection probably has not been made, because a high ERL measurement is far
better than expected. This test can be performed at the PBXs at both ends of the
link in the same fashion, again with the IBM 9783 unit disconnected.
5.3 Monitoring Voice over Frame Relay on IBM 2212 Accessibility
Figure 57. Network Used for Moinoring Captures
Throughout this section, we will look at the commands that are available to
monitor the 2212 on the left. There is full connectivity between the four
telephones provided and the subchannels used are shown in the table of Figure
57. From talk 6, you will be able to confirm what type of adapter has been
configured for each slot and the assigned interface numbers:
And from talk 5 you will be able to confirm the current status of the ports:
Config>LIST DEVICES
.... other interfaces removed to save space ...
Ifc 5 Voice FXS Slot: 1 Port: 1
Ifc 6 Voice FXS Slot: 1 Port: 2
Ifc 7 Voice FXO Slot: 3 Port: 1
Ifc 8 Voice FXO Slot: 3 Port: 2
Config>