NEC NDA-24300 manual Timings for Trunks

				FAULT REPAIR PROCEDURES
			Table 5-4 Timings for Trunks
	ITEMS FOR STATUS		CONDITIONS FOR SUPERVISION	TIMING SPECIFICATIONS
	SUPERVISION
1	Detection of Call	•	Ring Down System	Ringing signal of more than 4 cycles
	Termination		Detection by ringing signal (20Hz) from	is detected within 800 ms.
			the opposite office.
		•	Loop System	Detection within 16 ms after call
				termination.
			Detection by loop from the opposite office.
		•	E&M System
			Detection by incoming signal (ground or –
			48V) on E (RG2) lead.
2	Acknowledge Signal	•	Wink Signal	160 ms (standard)
	Sending	•	Delay Start	Timing can be assigned using ARTD
				command.
3	Detection of Release at the	•	E&M System	288 ms (standard)
	time of Incoming	•	Loop System
	Connection			160 ms (standard)
				Timing can be assigned using ARTD
				command.
4	Timing for Restricting Call	After release of the user’s trunk or the trunk at		3070 ms (standard)
	Origination after Release	the opposite office has been detected, a new		Timing can be assigned using ARTD
		call origination is restricted.		command.
5	Seizure of Opposite Office	•	Loop System
			Closure of DC loop.
		•	E&M System
			Supply of outgoing call signal (ground or –
			48V) onto M (DL) lead.
6	Detection of Acknowledge	•	Wink Signal	Timing is assigned using ARTD
	Signal	•	Delay Start	command.
7	Trunk Hold Time	Even if answer signal has not reached from the		• If DP Signal is 10 sec. (standard)
		opposite office, the call is regarded as		after dial pulses are sent out
		answered.		Timing can be assigned using
				ARTD command.
				• If PB Signal is 30 sec. (standard)
				after seizure of the trunk
				Timing can be assigned using
				ASYD SYS 1 Index 156 (only
				when 2nd Dial Tone System).
8	Detection of Release at the	•	Loop System	608 ms (standard)
	time of Outgoing		Detection of polarity reversal across tip and	Timing can be assigned using ARTD
	Connection		ring.	command.
		•	E&M System
			Detection of Release Signal (ground or –
			48V) on E lead.

NDA-24300CHAPTER 5

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Issue 1