Verilink PRISM 3101 (34-00212) Product Manual - Manual (Page 18)

Configuration 3-2 PRISM 3101/3102
ones density requirements of the T1 network line must be
ensured in this mode. Refer to the section entitled
Line Parameters on page 3-10 for more information.
Selecting Nx56K (Up) allows port bit rates that are multi-
ples of 56 kbps. The unit maintains ones density for the
selected DS0 channel in this mode.
Data Port 2: Switch S1-8 sets the multiplier for Data Port
2 on the 3102 only. The unit can operate at any data rate that
is a multiple of 56 or 64 kbps. Selecting Nx64K (Dn) pro-
vides port bit rates that are multiples of 64 kbps. The ones
density requirements of the T1 network line must be
ensured in this mode. Refer to the section entitled
Line Parameters on page 3-10 for more information.
Selecting Nx56K (Up) allows port bit rates that are multi-
ples of 56 kbps. The unit maintains ones density for the
selected DS0 channel in this mode.
Switch S2
Switch S2 (Figure 3-3) configures parameters for Network
Framing, Network Coding, Network LBO, Timing Source,
Test Button loop Code, and Test Button Mode.
Network Framing: Switch S2-1 matches the unit to the
network line framing as either ESF (Dn) or D4 (Up).
Network Coding: Switch S2-2 sets the network line cod-
ing to either B8ZS (Dn) or AMI (Up).
Network LBO: Switch S2-3 and S2-4 set the line build
out signal level of the transmit data (TXD) from the unit to
the network. The telephone company can provide the
proper setting.
If unsure of the exact setting, leave it at the
default value. Table 3-C lists the available levels.
Timing Source: Switch S2 -5 and S2-6 determine the unit
clocking source. The most common timing source for CSU/
DSU applications is the network. The 3101/3102 may also
be optioned to time from an internal standard or from the
high speed data interface as shown in Table 3-D.
Test Button Loop Code: Switch S2-7 selects either an
inband line loopback code (Dn) or an inband V.54 loop code
(Up) for use with the front panel test button. On the 3102
model, this switch applies to Data Port 1 only.
Test Button Mode: Switch S2 -8 selects the test button
operation mode as either BERT (Dn) or Clear (Up).
Switch S3
Switch S3 (Figure 3-4) sets the Port 1 and Port 2 bit rates as
shown in Table 3-E. Positions S3-6 through S3 -10 are not
applicable on the 3101.
Table 3-C Network LBO
S2-3 S2-4 Network LBO
Dn Dn 0 dB
Up Dn -7.5 dB
Dn Up -15.0 dB
Up Up -22.5 dB
7 6 5 4 3 2 1
Dn
Up
8
Netwo
rk
Netwo
rk
Netwo
rk
T
est Butto
n
T
est Butto
n
Fra
m
in
g
Co
d
in
g
Mo
de
Lo
op
C
o
de
Ti
m
in
g
So
urc
e
LBO Netwo
rk
LBO
Switch
S2
Ti
m
in
g
So
urc
e
Figure 3-3 Switch S2
Table 3-D Timing Source
S2-5 S2-6 Timing Source
Dn Dn Network
Up Dn Internal
Dn Up Port 1 EXC
Up Up T1 DTE
Table 3-E Port 1/Port 2 Bit Rates
# of
DS0s
S1-7 Up S1-7 Dn S3-1 S3-2 S3-3 S3-4 S3-5
S1-8 Up S1-8 Dn S3-6 S3-7 S3-8 S3-9 S3-10
Disable Disable Dn Dn Dn Dn Dn
1 56 kbps 64 kbps Up Dn Dn Dn Dn
2 112 128 Dn Up Dn Dn Dn
3 168 192 Up Up Dn Dn Dn
4 224 256 Dn Dn Up Dn Dn
5 280 320 Up Dn Up Dn Dn
6 336 384 Dn Up Up Dn Dn
7 392 448 Up Up Up Dn Dn
8 448 512 Dn Dn Dn Up Dn
9 504 576 Up Dn Dn Up Dn
10 560 640 Dn Up Dn Up Dn
11 616 704 Up Up Dn Up Dn
12 672 768 Dn Dn Up Up Dn
13 728 832 Up Dn Up Up Dn
14 784 896 Dn Up Up Up Dn
15 840 960 Up Up Up Up Dn
16 896 1024 Dn Dn Dn Dn Up
17 952 1088 Up Dn Dn Dn Up
18 1008 1152 Dn Up Dn Dn Up
19 1064 1216 Up Up Dn Dn Up
20 1120 1280 Dn Dn Up Dn Up
21 1176 1344 Up Dn Up Dn Up
22 1232 1408 Dn Up Up Dn Up
23 1288 1472 Up Up Up Dn Up
24 1344 1536 Dn Dn Dn Up Up
8 7 6 5 4 3 1
D
n
U
p
10
Switch
S3
2 9
Port 1 Bit Rate Port 2 Bit Rate
Figure 3-4 Switch S3