4051 DDS CSU/DSU
Configuration Guide
45 - 00113
2. 0
Specifications
Network Interface
Service Type: DDS I and DDS II clear channel
conforming to TR62310
Operating Modes : Full duplex, poin t - to-point, multi-p oint
Line Rates: 56 kbps (DDS I) and 72 kbps (DDS II)
Loop Range: Up to a 45-dB loss
Line Connection : RJ - 4 8S jack, 8-pi n mod.
Timing Sou r c es : Network, DTE, and Internal
Equipment Interface
Sync Data Rates: 56 kbps (DDS I) a nd 64 kbps (DDS II)
Anti-stream Timer: Off, 10, 30, or 60 seconds
DTE Clocking: Internal or External
DTE Connections: 34- pin V.35 (ITU) or 25- pin RS - 232D
Clocking: Internal or external
Diagnostics
Loopbacks: CSU, V.54 (receive and send)
BERT: 511 pattern
Management Interfaces
Supv Connecti on: 8 - pi n modular (RS -23 2)
Data R at es: 1.2, 2.4, 9.6, and 19.2 kbps
Power
48 VDC: chassis supplied; 6 5 mA, 3. 12 W, 10.6 BTU max.
24 VDC: chassis supplied; 140 mA, 3.36 W, 11.5 BTU max.
Connection: 5-pin DIN
Mechanical
Housing: Verilink 1051 chassis
Mounting: Rack mount
Dimensions (nom.): 9. 3 8 (2 3.8 cm ) lo ng
6.63 inches (16 .8 cm) high
1.38 inches (3.49 cm) wide
Weight: 1 pound (0.4 42 kg)
Environmental
Operating Temp: 32° to 122°F (0° to 50°C)
Storage Temp: −4° to 185°F (−20° to 85°C)
Hum i d ity : 95% max. (non-condensing)
Compatibility
TR62310
TR41450
Internet Standards: RFC 1157 (SNMP)
RFC 1155 (SMI)
RFC 1213 (MIB - II)
RFC 1055 (SLIP)
MIB-II: Device identification and interface performance
data. All applicable objects and rep orting are
maintained by the 8100A Site Controller.
Industry Listings
FCC Compliance: Part 15 Class A, Subpart B, and Part 68
U.S. Safety: UL 1950, 3rd edition
Canadian Safety: CSA C22.2 No. 950-95
Industry Canada: CS-03, Issue 8
Front Panel Description
STATUS When the green in di cat or is O n , t he
unit is powered and may be
operating normally.
When the red indicator is On, there
is a fault that exceeds alarm
thresholds or another type of unit
failure.
TD This gre e n indicator is On during a
mark condition on the high-speed
transmit-data line.
RD This green indicator is On during a
mark condition on the high-speed
receive-data line.
RTS This green indicator is On when the
request to send signal is active.
DTR This green indicator is On when the
data terminal ready signal is active.
F AR/LOC In the FAR position, the 4051 sends
five seconds of the V.54 loop
pattern then switches to the 511
pattern.
DTE
In the middle position, the 4051
sends five seco n ds of V.54
loopdown code then returns to its
normal operating mode.
In the LOC position, the 4051
performs a network latching
loopback.
DTE
Activity
Indicators
These two, small recessed
indicators are just above the
supervisory connector and show
supervisory and n e twork manager
port activity.
SUPV The supervisory port provides
direct terminal access to control
and monitor the 4051.
NET LOS This red indicator is On during a
loss of sign al from the DDS
network.
NET OOF This amber indicator is On when
the unit detects and out of frame
condition or receives OOF codes.
TST
LOOP
TST
BER T
This amber indicator is On when
the network interface is in an y lo op .
This indicator is On when a 511-b it
BERT is in progress.
TST ERR This indicator is On when BERT
pattern errors are detected.
Far End
Network
RTS
DTR
TD
RD
4051
CSU/DSU
STATUS
LOS
N
E
OOF
D
T
E
LOOP
BERT
S
U
P
V
ERR
T
T
S
T
LOCFAR
7654321 8
LSB MSBbinary values
Down Up
1 2 4 8 16 32 64 128
00000000
Top-Edge View of the PRISM 4051
Switch 1 Switch 2 Switch 3 Switch 4
1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
Down Up
Configuration
Factory default settings are
underlined
Switch 1
Boot from S1-1
DIP switches
Saved Configuration Up
DDS Mode S1- 2
DDS II (64 kbps)
DDS I (56 kbps) Up
Timing Source S1-3 S1-4
Network
Internal Down Up
DTE Up Down
RTS/
CTS
Delay
Normal
Long 56 kbps 0.8±0.04 ms Up
.
Down
Down
Down Down
DTE
Delay S1-5
Rate
56 kbps 0.4± 0.02 ms Down
64 kbps 0.3±0.015 ms
64 kbps 0.6± 0.03 ms
RTS, CTS, and
DCD Handshake
Force True
Normal Up
LL and RL S1 -7
Disable
Enable Up
DTE Alarm S1-8
Disable
Enable Up
S1 -6
Down
Down
Down
Switch 2
Antistream Timer S2-1
Off Down
30 seconds Up
V.54 Loop Detection S2-2
Enable
Disable Up
Circuit Assurance S2-3
Enable Up
Disable
Down
Down
Loop Mode S2 -4
Bidirectional
Unidirectional Up
SUPV Port Rate S2-5 S2-6
19.2 kbps
1.2 kbps Down Up
2.4 kbps Up Down
9.6 kbps Up Up
NMS Port Rate S2-7 S2-8
19.2 kbps
1.2 kbps Do wn Up
2.4 kbps Up Down
9.6 kbps Up Up
Down
Down Down
Down Down
Switch 3*
Force Download Mode S3-8
Normal Oper ation
Begin Flash Download Up
* Swit c he s S3-1 throug h S3-7
are not used.
Down
Switch 4
Switch S4 sets the unit address.
When using the 4051 with an
8100A Site Controller, each element in a group must have a
unique unit address. As many as
50 units (with addresses from 1 to
50) can exist in a group. If the unit
is not connected to a site controller, the NMS unit address should
be left at the fa ctory d efau lt setting
of 1
where Position 1 is Up and al l
other positions are Down.
Switch S4 has eight positions used
to create an 8-bit binary code for
an address in the range of 1 to 50.
Switch position S4-1 is the least
significant bit (LSB ) and S4-8 is
the most significant bit (MSB). If a
switch is down, its value is 0. If
up, its value is that of the upper location. The values are additive. For
example, to set a unit address to 5,
position S4-3 (binary value is 4)
and position S4-1 (binary value is
1) would be set Up for a unit address of 5 (4+1). All other positions would be set Down.
Connections
1051-2 Rear Panel Pinouts
Pin T1 NET DDS NET*
1 Data In Data Out Network In 48-V Return
2 Data In Data Out Network In Signal Ground
3 Not Used Not Used Network Out −48 VDC
4 Data Out Not Used Network Out Fram e Ground
5 Data Out Not Used Stat ion Clock Alarm Contact
6 Not Used Not Used Station Clock Common
7 Not Used Data In N/A N/A
8 Not Used Data In N/A N/A
* T1 NET connector converts to DDS NET using a supplied DDS
adapter cable (part number 9-1001-075-1).
TB1
Network/Clock
TB2
Alarm/Power
( B )
NMS
IN
12
11 10 9 8 7 6 5 4 3 2 1
( B )
NMS
OUT
TB1 TB2
T1 DTE
HIGH SPEED DTE
T1 NET
TB1 TB2
Rear Panel of the Verilink 1051-2 Chassis
145 Baytech Drive
San Jose, California 95134
127 Jetplex Circle
Madison, Alabama 35758
Technical Assistance Center
(800) 837-4546
( A )
NMS
IN
( A )
NMS
OUT
ENET
123456789101112
123456789101112
www.verilink.com
FAX-On-Demand
(800) 957-546 5
(800) 285-2755
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