User guide
99
Service Trunk Module (STM) shelf (NT1X58)
The STM accepts analog trunks, digital service circuits, or both, and
processes the signals to a common Pulse Code Modulation (PCM) format.
The NT1X58 version of the STM shelf is divided into two STM mod-
ules, each module being a separate STM. Slots 01-11 contain
STM-0 (max. 7 test or service cards). and slots 12-22 contain STM-1
(max. 6 test or service cards). The NT7X30 version of the STM also con-
tains two STM modules. Slots 01-08 contain STM-0 (max. 5 test or service
circuits) and slot 09-22 contain STM-1 (max. 6 test or service circuits).
Note:
For a chart showing service circuit slot assignments for the NT1X58
STM, see NTP 297-8991-805 (search on NT1X58 for CD-ROM).
Service Trunk Module (STM) shelf (NT7X30)
Note: For further description of the following STM packs, see the “Circuit
Pack Description” within this QRG or see NTP 297-8991-805.
0X50
—
Filler Faceplate
0X70 — STM Processor
2X09 — 5V 40Amp Power Converter
2X70
—
+- 5/12V Power Converter
2X45 — STM Interface
2X53
—
STM Control
4X65
— Combination STM Control
Optional Service Circuit Card Examples
1X00AB — 102 Milliwatt Test Trunk or Receiver-Off-Hook Tone
1X31AA
—
3-port Conference Circuit
1X75BA — DRAM Controller card
1X76AA — DRAM Programmable Read-Only Memory card
1X77AA — DRAM Random Access Memory cards
1X79AA
— DRAM Electronically erasable read-only memory cards
1X81AA — Conference Trunk Module (CTM) (Compact Conference)
The NT1X81AA CTM is a stand-alone peripheral module
(PM), that offers the same functionality as a fully equipped
conference shelf. See NTP 297-1001-530,
Conference Cir-
cuit Guide for more details.
1X90AA — TTT Test Signal Generator
2X47AD — Transmission Test Unit (TTU) control and signal generator
2X48AB — Digital 4-channel DGT or MF Receiver
2X56AB — TTU Digital Filter
2X75AA — Looparound Test Line
3X02AA — TOPS Control Processor
3X03AA — TOPS Digital Signal Processor
3X67AA — North American Six-port Conference Circuit
3X67BB — International Six-port Conference Circuit
3X68(XX) — Tone Generator (PRMT/PST/CONF)
5X29AA — Digital Tone Detector and Sender
2
X
70
or
0
X
50
01
P
O
W
E
R
02 03
4
X
65
C
O
N
T
04
S
05
E
C
B
06
S
R
A
E
07
E
V
R
L
08
E
I
D
O
09
C
S
W
10
E
11
4
X
65
C
O
N
T
12 13
S
S
C
B
14
E
E
A
E
15
E
R
R
L
16
V.
D
O
17
S
W
18
0
X
50
19
2
X
70
20
P
O
W
E
R
21 22 23 24 25
STM-0 STM-1
2
X
45
or
0
X
50
01
0
X
70
or
0
X
50
02
2
X
53
C
O
N
T
03
S
C
B
04
S
E
A
E
05
E
R
R
L
06
E
V.
D
O
07
S
W
08
2
X
45
or
0
X
50
09
0
X
70
or
0
X
50
10
2
X
53
C
O
N
T
11
S
C
B
12
S
E
A
E
13
E
R
R
L
14
E
V.
D
O
15
S
W
16
2
X
09
17
P
O
W
E
R
18
0
X
50
19
2
X
70
20
P
O
W
E
R
21 22 23 24 25
STM-0 STM-1