Patton electronic 1095 user manual Remote Digital, Loop

Local Loop		After the 511/511E pattern times out, the ER led					Remote Digital	The Remote Loop uses the EOC channel (an
with 511/511E		will begin flashing. It will remain this way until					Loop	out-of-band signaling channel) to establish the
(continued)		the pattern generator switch is turned off. Note						remote link. Upon the RDL switch being thrown
		that the data at the local DTE and the remote						or DTE initiation, a RDL_ON Request signal is
		DTE are not valid. Because the data is unframed						sent to the remote unit. The Remote unit then
		there is no way for the framer to send this data						responds with an RDL Acknowledge command
		out to the DTE. This is an important distinction						and the link is established. Data originates at the
		because other Patton units will send out the 511						local DTE and is looped at the Remote
		pattern.						PROCESSOR back to the Local DTE. Note that
		When the unit is placed into a Mode 2 Local						the data is also passed through to the Remote
								DTE and is not squelched. When a Remote unit
		Loop, the 511/511E pattern generator on the						enters RDL, it changes its' Restart timeout to
		local unit is unavailable for transmission. As can						one minute (the reason will be explain in the
		be seen from Figure 11, the 511/511E pattern						RDL with 511/511E section). If the line is discon-
		generator has no data path connections avail-						nected, the local unit will Restart (NS led activat-
		able. The 511/511E pattern generator is still						ed) after 4 - 6 seconds, but the Remote unit will
		available on the remote unit. For more informa-						wait for one minute before it Restarts. Note that
		tion on the proper operation of this pattern gen-						the transmit data at the Remote DTE is ignored.
		erator please refer to the "Remote Digital Loop						When the switch is thrown or the DTE removes
		with 511/511E" section.						the RDL request, the local unit will transmit an
								RDL_OFF Request to the Remote unit. The
								local unit will keep its' TM led active until this
								request has been completely sent out. If the
Framer	Pattern	Loop	Line	Loop	Pattern	Framer		switch is thrown again before the completion of
	Gen/Det	Control		Control	Gen/Det			the termination phase the switch will be ignored
								until it is placed back into the normal position.
	Processor			Processor

Figure 10. Block Diagram Local Loop Mode 1 with 511/511E

Framer	Pattern	Loop		Loop	Pattern	Framer
			Line
	Gen/Det	Control		Control	Gen/Det

Framer	Pattern	Loop	Line	Loop	Pattern	Framer	Processor	Processor
	Gen/Det	Control		Control	Gen/Det

Figure 12. Block Diagram Remote Loop

Processor

Processor

Figure 11. Block Diagram Local Loop Mode 2 with 511/511E

27 28