RAD Data comm E1/T1 operation manual Local Analog Loopback for T1 and Sub T1 Links

Chapter 5 Setup Menu FCD-IPMInstallation and Operation Manual

•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.

FCD-IPM

Link1 T1 Interface

T1

Service

Loopback

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.

FCD-IPM (T1 with Sub Link)
Router/Bridge	Link1
	T1
	Service
	Sub Link T1
	Interface
	T1 Service
	or PABX
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.

5-40 Interface Parameters Menu