Chapter 5 Setup Menu FCD-IPM Installation and Operation Manual
5-40 Interface Parameters Menu
Main Link Local Analog Loopback – In this mode the data transmitted from
FCD-IPM to the T1 line is sent back to the receive path instead of the received
data from the T1 line. The loopback is shown in Figure 5-48.
Link1 T1 Interface
FCD-IPM
Loopback
T1
Service
Figure 5-48. Local Analog Loopback
Sublink Local Analog Loopback (for FCD-IPM with a sublink) – In this mode
the data transmitted from FCD-IPM to the sub T1 line is sent back to the
receive path instead of the received data from the sub T1 line. The loopback is
shown in Figure 5-49.
Link1
FCD-IPM (T1 with Sub Link)
Router/Bridge
T1 Service
or PABX
Sub Link T1
Interface
T1
Service
Loopback
Figure 5-49. Local Analog Loopback for T1 and Sub T1 Links
Voice Diagnostic Tools
There are three voice diagnostic tools that are available for FCD-IPM. They can be
set independently for each voice port:
Tone injection to the voice port – a 1 kHz signal is injected into the receive
voice port path, replacing any receive signal from T1
Tone injection to the T1 – a 1 kHz signal is injected into the receive voice
port path, replacing any receive signal from T1, and injected into the T1
transmit path, replacing any transmit signal to T1
Remote port loopback – the voice port signal which is received from T1 is
transmitted back to T1.