Timing source, Figure 2-2 top-edge view of the prism4001, Table 2-a timing source – Verilink PRISM 4001 (34-00244) Product Manual User Manual
Page 12: Dds network rate, Table 2-b dds network rate, Dte line rate, Table 2-c dte line rate = 56 kbps, txport mode, Table 2-d dte line rate = 64 kbps, txport mode, Table 2-e dte rate=56 or 64 kbps, txport mode, a

2-2 Installation
PRISM 4001
T
IMING
S
OURCE
Positions S1-1 and S1-2 determine the source of unit clock-
ing. The most common timing source for most DDS appli-
cations is to derive timing from the network. The unit may
also be clocked from an internal standard or from the DTE
as shown in Table 2 -A.
DDS N
ETWORK
R
ATE
Positions S1-2 through S1-5 are used to set the network
interface line rate as shown in Table 2-B.
DTE L
INE
R
ATE
Positions S1-6 through S1-8 are used to set the DTE inter-
face line rate as shown in Table 2-C. If in TxPORT mode
and Sync mode and Line Rate is 56 kbps, then:
If in TxPORT mode, Sync format, and the Line Rate is 64
kbps, set the DTE Line Rate as shown in Table 2-D.
If in TxPORT mode, with a Line Rate of 56 or 64 kbps, and
in ASYNC format, set the DTE rate as shown in Table 2-E.
In TxPORT mode, if the DDS Network Rate is
less than 56 kbps. The DTE Rate must match the
Net Rate. The Sync format is not allowed in
TxPORT mode below 56 kbps.
Table 2-A Timing Source
Timing
Source
S1-1
S1-2
Network
Down
Down
DTE
Down
Up
Internal
Up
Down
Table 2-B DDS Network Rate
Network
Rate
S1-3
S1-4
S1-5
56 kbps
Down
Down
Down
64 kbps
Down
Down
Up
2.4 kbps
Down
Up
Down
4.8 kbps
Down
Up
Up
9.6 kbps
Up
Down
Down
19.2 kbps
Up
Down
Up
38.4 kbps
Up
Up
Down
Table 2-C DTE Line Rate = 56 kbps, TxPORT
Mode, and Sync Mode
DTE Rate
S1-6
S1-7
S1-8
54 kbps
Down
Down
Down
2.4 kbps
Down
Down
Up
4.8 kbps
Down
Up
Down
9.6 kbps
Down
Up
Up
19.2 kbps
Up
Down
Down
38.4 kbps
Up
Down
Up
Figure 2 -2 T
OP
-E
DGE
V
IEW
OF
THE
P
RISM
4001
Switch S1
1
8
7
6
5
4
3
2
Switch S2
1
8
7
6
5
4
3
2
Switch S3
1
8
7
6
5
4
3
2
Switch S4
1
8
7
6
5
4
3
2
RS232 -----V.35
RS232 -----V.35
Table 2-D DTE Line Rate = 64 kbps, TxPORT
Mode, and Sync Mode
DTE
Rate
S1-6
S1-7
S1-8
62 kbps
Down
Down
Down
56 kbps
Down
Down
Up
2.4 kbps
Down
Up
Down
4.8 kbps
Down
Up
Up
9.6 kbps
Up
Down
Down
19.2 kbps
Up
Down
Up
38.4 kbps
Up
Up
Down
Table 2 -E DTE Rate=56 or 64 kbps, TxPORT Mode,
and Async Mode
DTE Rate
S1-6
S1-7
S1-8
57.6 kbps
Down
Down
Down
2.4 kbps
Down
Down
Up
4.8 kbps
Down
Up
Down
9.6 kbps
Down
Up
Up
19.2 kbps
Up
Down
Down
38.4 kbps
Up
Down
Up