Verilink PRISM 4001 (34-00244) Product Manual - Manual (Page 12)

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