Verilink PRISM 4001 (34-00244) Product Manual - Manual (Page 5)

General 1-1 PRISM 4001
1. General
The TxPORT P RISM 4001 (Figure 1-1) is a modular, nest
mounted DDS CSU/DSU that provides the perfect solution
for high density locations. The same type of system solution
that TxPORT provides for T1 is now available for Digital
Data Service. Integrating the PRISM 4001, the PRISM 4101
and the 8100A Site Controller provides a TxPORT end-to-
end, LAN managed solution for your DDS needs.
The 4001 is an advanced CSU/DSU offering a managed inter-
face for customer equipment into standard DDS service. It
supports synchronous data rates from 2.4 to 56 kbps and asyn-
chronous data rates from 2.4 to 57.6 kbps. The unit also sup-
ports 64 kbps non-clear channel for limited-distance modem
(LDM) applications. The rate adaptation feature allows slower
rate customer equipment to transmit over 56 or 64 kbps lines.
The DTE supports both V.35 and RS-232 interfaces. External
clocking is supported for tail circuit applications.
The 4001 is simple to install and operate. Full access to con-
figuration, status, and diagnostic features is available via the
software driven terminal interface connection or via the 8100A
Site Controller which allows SNMP and T
ELNET connections
from any host. Configuration can also be done with card-edge
switches.
The 4001’s diagnostic features permit quick and easy trou-
ble isolation. It responds to all standard loop codes from the
telco and can initiate remote V.54 loopbacks. An internal
BERT may be used for stress testing. The 4001 monitors
line conditions and reports them via front panel LEDs, a
user connection to the terminal interface, a T
ELNET connec-
tion, or SNMP via the 8100A Site Controller.
The dial backup feature ensures that critical data applica-
tions are secure. The dedicated line service is monitored for
trouble conditions. When a line failure is detected, the unit
establishes a dial connection through an external device or
an optional internal modem. Once the backup link is up, the
unit routes the customer data through the switched service.
When dedicated line service is restored, the unit automati-
cally reverts back. The dial backup port allows the user to
utilize any type of switched service.
The chapters in this manual are arranged as follows:
1. General - Describes product specifications, FCC and
warranty information, in addition to TxPORT ordering
numbers and customer service telephone numbers.
2. Installation - Describes unit mounting, configuration,
port and interface connections, and unit powering.
3. Operation - Describes the front panel controls and indi-
cators, unit testing, and control port features.
LOS
LOC FAR
OOS
LOOP
TST
N
E
T
ERR
D
T
E
TD
RD
RTS
CTS
4001 DDS
CSU /DSU
S
U
P
V
8
1
Figure 1 -1 TxPORT PRISM 4001
DCD
DTR
DSR
T
S
T
D
B
U
10
1
DBU ACTIVE
STATUS
4. Terminal Operation - Describes the terminal interface
setup and the menu-based screens which appear during a
local or remote session.
Features
• Multirate DDS-I service at 2.4 to 64 kbps synchronous DTE
rates and 2.4 to 57.6 kbps asynchronous DTE rates
• TxPORT framed mode allows end-to-end communication
• Rate adaptation of subrate DTE onto 64 kbps lines
• Dial backup and automatic restoral of DDS line through an
internal or external modem or an ISDN unit
• Complete diagnostic capabilities including multiple loops
and built-in BERT
T R A N S P O R T
®