Nortel Networks 553-3001-211 manual RS-232 interface pin assignments Part 2, Sct, Scr, Dtr, Etc

		NT6D80 MSDL card			Page 389 of 894
Table 145
RS-232 interface pin assignments (Part 2 of 2)
			EIA	CCITT
Pin	Signal name		circuit	circuit		DTE	DCE
3	Receive Data (RX)		BB	104			X
4	Request to Send (RTS)		CA	105		X
5	Clear to Send (CTS)		CB	106			X
6	Data Set Ready (DSR)		CC	107			X
7	Signal Ground (SG)		AB	102		—	—
8	Carrier Detect (CD)		CF	109			X
15	Serial Clock Transmit		DB	114			X
	(SCT)
17	Serial Clock Receive		DD	115			X
	(SCR)
18	Local Loopback (LL)		LL	141		X
20	Data Terminal Ready		CD	108.2		X
	(DTR)
21	Remote Loopback (RL)		RL	140		X
23	Data Rate Selector (DRS)		CH/CI	111/112		X
24	External Transmit Clock		DA	113		X
	(ETC)
25	Test Mode (TM)		TM	142			X

Table 146 on page 390 lists RS-422 interface specifications for EIA circuits. It shows the connector pin number, the associated signal name, and the

Circuit Card Description and Installation