Nxt1 Hssi Option Module (P/N 1200346L1), 50-Pin Scsi-Ii; Nxt1 Hssi/V.35 Option Module (P/N 1200346L2); Table 26. Hssi (Scsi-Ii, 50-Pin) Connection Pinout; Table 27. Hssi/V.35 Connection Pinout - ADTRAN Atlas 550 System Manual

Section 2 Engineering Guidelines

NxT1 HSSI Option Module (P/N 1200346L1), 50-Pin SCSI-II

The NxT1 HSSI Option Module uses a single 50-pin SCSI-II interface to combine up to eight T1s of data
(four from the NxT1 HSSI Module T1 ports and four from other T1 ports installed in the system). Table 26
gives the pinouts for the SCSI-II connector, and Table 28 on page 45 gives the pinouts for the RJ-48C (T1)
connector.
Pin # Pin #
(+ side) (- side)
1 26
2 27
3 28
4 29
5 30
6 31
7 32
8 33
9 34

NxT1 HSSI/V.35 Option Module (P/N 1200346L2)

V.35 is possible with the NxT1 HSSI Option Module with an appropriate adapter cable (ADTRAN
P/N 3125I081@A); however, some HSSI menu options will be unavailable in this mode (for details, see
the User Interface Guide section). Table 27 and Table 28 on page 45 give the pinouts for the V.35 and
RJ-48C (T1) connectors, respectively.
Pin#
(+ side)
10
44

Table 26. HSSI (SCSI-II, 50-Pin) Connection Pinout

Description
SG - Signal Ground
RT - Receive Timing
CA - DCE Available
RD - Receive Data
LC - Loopback Circuit C
ST - Send Timing
SG - Signal Ground
TA - DTE Available
TT - Terminal Timing

Table 27. HSSI/V.35 Connection Pinout

Pin#
Direction
(- side)
1 26 —
2 27 O
3 28 O
4 29 O
5 30 O
6 31 O
7 32 —
8 33 I
9 34 I
35 I
© 2004 ADTRAN, Inc.
Pin # Pin #
(+ side) (- side)
10 35
11 36
12 37
13 38
14-18 39-43
19 44
20-23 45-48
24 49
25 50
Description
HSSI SG - Signal Ground
HSSI RT - Receive Timing
HSSI CA - DCE Available
HSSI RD - Receive Data
HSSI LC - Loopback Circuit C
HSSI ST - Send Timing
HSSI SG - Signal Ground
HSSI TA - DTE Available
HSSI TT - Terminal Timing
HSSI LA - Loopback Circuit A
ATLAS 550 System Manual
Description
LA - Loopback Circuit A
SD - Send Data
LB - Loopback Circuit B
SG - Signal Ground
Ancillary to DCE (Reserved)
SG - Signal Ground
Ancillary to DTE (Reserved)
TM - Test Mode
SG - Signal Ground
61200305L2-1B