
Switch 1
S1-1: Determines the power-up
mode.
Down: Switches Up: RAM
S1-6: Sets the channel
assignment mode.
Down: Contiguous Up: Alternate
S1-7: Sets the Port 1 rate
multiplier.
Down: N×64K Up: N×56K
S1-8: Sets the Port 2 rate
multiplier.
Down: N×64K Up: N×56K
Switch 4
S4-1: Set the DTE framing
type.
Down: ESF Up: D4
S4-2: Set the DTE line coding.
Down: B8ZS Up: AMI
Switch 2
S2-1: Set the network line
framing.
Down: ESF Up: D4
S2-2: Sets the network line
coding.
Down: B8ZS Up: AMI
S2-7: TEST button loop code
Down: LLB code Up: V.54 code
S2-8: TEST button operational
mode.
Down: BERT Up: Clear Loop
S1-2 S1-3 SUPV Port Rate
Up Up 1.2 kbps
Down Up 2.4 kbps
Down Down 9.6 kbps
Up Down 19.2 kbps
S1-4 S1-5 SLIP Port Rate
Up Up 1.2 kbps
Down Up 2.4 kbps
Down Down 9.6 kbps
Up Down 19.2 kbps
S4-3 S4-4 S4-5 DTE LBO
Down Down Down 0–110 ft
Up Down Down 111–220 ft
Down Up Down 221–330 ft
Up Up Down 331–440 ft
Down Down Up 441–550 ft
Up Down Up 551–660 ft
Down Up Up >660 ft
S2-3 S2-4 SUPV Port Rate
Down Down 1.2 kbps
Up Down 2.4 kbps
Down Up 9.6 kbps
Up Up 19.2 kbps
S2-5 S2-6 Timing Source
Down Down Network
Up Down Internal
Down Up Port 1 EXC
Up Up T1 DTE
O
N
1 2 3 4 5 6 7 8 9 10
O
N
1 2 3 4 5 6 7 8
O
N
1 2 3 4 5 6 7 8
O
N
1 2 3 4 5 6 7 8
S1
S4
S2 S3
18
18
18
110
T1
DTE
LAN SLIP SUPV NET DBU
115VAC
50/60Hz
120ma
DATA PORT 2 DATA PORT 1
T1
DTE
LAN SLIP SUPV NET DBU
115VAC
50/60Hz
120ma
DATA PORT 2 DATA PORT 1
T1
DTE
LAN SLIP SUPV NET DBU
DATA PORT 2 DATA PORT 1
48VDC
+
127 Jetplex Circle
Madison, Alabama 35758
(800) 837-4546
www.verilink.com
FAX-On-Demand
(800) 957-5465
Technical Assistance Center
(800) 285-2755
PRISM 3112 Rear Panel (AC/V.35 option)
PRISM 3112 Rear Panel (DC/EIA-530/LCD option)
PRISM 3112 Rear Panel (AC/V.35/LCD option)
Switch 3
# of
DS0s S3-1
(S3-6)
S3-2
(S3-7)
Port 1
(Port 2)
S3-3
(S3-8)
S3-4
(S3-9)
S3-5
(S3-10)
kbps if
S1-7
(S1-8) is
Up
kbps if
S1-7
(S1-8) is
Down
— Down Down Down Down Down Disabled Disabled
1 Up Down Down Down Down 56 64
2 Down Up Down Down Down 112 128
3 Up Up Down Down Down 168 192
4 Down Down Up Down Down 224 256
5 Up Down Up Down Down 280 320
6 Down Up Up Down Down 336 384
7UpUpUpDownDown392448
8 Down Down Down Up Down 448 512
9 Up Down Down Up Down 504 576
10 Down Up Down Up Down 560 640
11 Up Up Down Up Down 616 704
12 Down Down Up Up Down 672 768
13 Up Down Up Up Down 728 832
14 Down Up Up Up Down 784 896
15 Up Up Up Up Down 840 960
16 Down Down Down Down Up 896 1024
17 Up Down Down Down Up 952 1088
18 Down Up Down Down Up 1008 1152
19 Up Up Down Down Up 1064 1216
20 Down Down Up Down Up 1120 1280
21 Up Down Up Down Up 1176 1344
22 Down Up Up Down Up 1232 1408
23 Up Up Up Down Up 1288 1472
24 Down Down Down Up Up 1344 1536
Any DS0 not allocated to a data port is automatically allocated to the T1
DTE port.
Rear Panel Pinouts
Data Port Pinouts
Pin
LAN
Enet
LAN
Tkn Rng
SUPV/SLIP
Termin al
SUPV/SLIP
Modem T1 DTE* Network DBU
1 Data Out DCD Out DTR Out Data Out Data In Rx Clk In
2 Data Out CTS Out RTS Out Data Out Data In DTR Clk Out
3 Data In Data Out Frm Gnd Frm Gnd RTS Clk Out
4 Data In Data Out Data Out Data In Data Out Frm Gnd
5 Data In Data In Data In Data In Data Out Data Out
6 Data In Data Out Sig Gnd Sig Gnd Data In
7 RTS In CTS In Ch. Gnd Ch. Gnd Sig Gnd
8 DTR In DCD In Ch. Gnd Ch. Gnd CTS In
9DCD In
10 Tx Clk In
* An RJ-48X modular jack with loopack (100 Ω ± 5%) is available for the T1
DTE port. Unlike an RJ-48C, the RJ-48X has a shorting bar that engages
when no cable is plugged into the connector, looping the transmitted data
back into the unit.
Signal
V. 3 5
34-pin
EIA-530
25-pin
Signal
V. 3 5
34-pin
EIA-530
25-pin
Frm Gnd A 1 DSR E 6, 22
Sig Gnd B 7 DTR H 20, 23
Tx Data P, S 2, 14 DCD F 8, 10
Rx Data R, T 3, 16 Tx Clk Y, AA 12, 15
RTS C 4, 19 Rx Clk V, X 9, 17
CTS D 5, 13 Term Tmg U, W 11, 24
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