ADTRAN 1200305L1 system manual Quad BRI Isdn S/T Interface Option Module P/N 1200764L1

ATLAS 550 System Manual Section 2, Engineering Guidelines

Quad BRI ISDN (S/T Interface) Option Module (P/N 1200764L1)

Each port of the Quad BRI ISDN (S/T Interface) Option Module uses a single RJ-45 jack to connect to a standard BRI S/T interface circuit. The Quad BRI ISDN (S/T Interface) Option Module is only available for use in NT mode (User Term) applications. Table 27 shows the network pinout connection. The required wiring connection follows:

Connector Type	(USOC) RJ-45
	Table 27. BRI Pinout (S/T Interface)
PIN	NAME	DESCRIPTION
1, 2, 7, 8	Unused	—
3, 6	Receive	Receive for User Term (NT Mode)
4, 5	Transmit	Transmit for User Term (NT Mode)

NxT1 HSSI Option Module (P/N 1200346L1)

The NxT1 HSSI Option Module uses a single 50-pin SCSI-II interface to combine up to 8 T1s of data (4 from the NxT1 HSSI Module T1 ports and 4 from other T1 ports installed in the system). Table 28 (below) and Table 30 on page 45 give the pinouts for the SCSI-II and RJ-48C (T1) connectors, respectively.

Table 28. HSSI (SCSI-50) Connection Pinout

PIN# (+ side)	PIN# (- side)	DESCRIPTION
1	26	SG - Signal Ground
2	27	RT - Receive Timing
3	28	CA - DCE Available
4	29	RD - Receive Data
5	30	LC - Loopback Circuit C
6	31	ST - Send Timing
7	32	SG - Signal Ground
8	33	TA - DTE Available
9	34	TT - Terminal Timing
10	35	LA - Loopback Circuit A
11	36	SD - Send Data
12	37	LB - Loopback Circuit B
13	38	SG - Signal Ground
14-18	39-43	Ancillary to DCE (Reserved)

61200305L1-1F © 2002 ADTRAN, Inc. 43