Patton electronic Network Card 2707C 2707D User Manual

USER  
MANUAL  
MODEL 2707C, D  
G.703 NTU with  
V.35, X.21  
Interfaces  
Part# 07M2707-UM  
Doc# 08619U2-001,  
Rev. B  
SALES OFFICE  
(301) 975-1000  
TECHNICAL SUPPORT  
(301) 975-1007  
Revised 10/27/06  
An ISO-9001  
Certified Company  
 
1.0 WARRANTY INFORMATION  
Patton Electronics warrants all Model 2707 components to be free from  
defects, and will—at our option—repair or replace the product should it  
fail within one year from the first date of shipment.  
This warranty is limited to defects in workmanship or materials, and does  
not cover customer damage, abuse, or unauthorized modification. If this  
product fails or does not perform as warranted, your sole recourse shall  
be repair or replacement as described above. Under no condition shall  
Patton Electronics be liable for any damages incurred by the use of this  
product. These damages include, but are not limited to, the following:  
lost profits, lost savings and incidental or consequential damages arising  
from the use of or inability to use this product. Patton Electronics spe-  
cifically disclaims all other warranties, expressed or implied, and the  
installation or use of this product shall be deemed an acceptance of  
these terms by the user.  
1.1 FCC INFORMATION  
This equipment has been tested and found to comply with the limits for a  
Class A digital device, pursuant to Part 15 of the FCC Rules.These limits  
are designed to provide reasonable protection against harmful interfer-  
ence when the equipment is operated in a commercial environment.This  
equipment generates, uses, and can radiate radio frequency energy and,  
if not installed and used in accordance with the instruction manual, may  
cause harmful interference to radio communications. Operation of this  
equipment in a residential area is likely to cause harmful interference in  
which case the user will be required to correct the interference at his own  
expense. If this equipment does cause harmful interference to radio or  
television reception, which can be determined by turning the equipment  
off and on, the user is encouraged to try to correct the interference by  
one or more of the following measures:  
• Reorient or relocate the receiving antenna  
• Increase the separation between the equipment and receiver  
• Connect the equipment into an outlet on a circuit different from that to  
which the receiver is connected  
1.2 CE NOTICE  
The CE symbol on your Patton Electronics equipment indicates that it is  
in compliance with the Electromagnetic Compatibility (EMC) directive  
and the Low Voltage Directive (LVD) of the Union European (EU). A Cer-  
tificate of Compliance is available by contacting Technical Support.  
2
 
     
1.3 SERVICE  
All warranty and nonwarranty repairs must be returned freight prepaid  
and insured to Patton Electronics. All returns must have a Return Mate-  
rials Authorization number on the outside of the shipping container. This  
number may be obtained from Patton Electronics Technical Services at:  
Tel: (301) 975-1007  
Note Packages received without an RMA number will not be  
accepted.  
Patton Electronics' technical staff is also available to answer any ques-  
tions that might arise concerning the installation or use of your Patton  
Model 2707. Technical Service hours: 8AM to 5PM EST, Monday  
through Friday.  
3
 
 
2.0 GENERAL INFORMATION  
Thank you for your purchase of this Patton Electronics product. This  
product has been thoroughly inspected and tested and is warranted for  
One Year parts and labor. If any questions or problems arise during  
installation or use of this product, please do not hesitate to contact Pat-  
ton Electronics Technical Support at (301) 975-1007.  
2.1 FEATURES  
Terminates G.703 E1 service (2.048 Mbps)  
• Available in low-cost standalone or rack-mountable versions  
• X.21 and V.35  
• Switch-selectable AMI or HDB3 line encoding options  
• Switch-selectable DTE/DCE modes for X.21 version  
• 75 Ohm dual coax and 120 Ohm twisted-pair G.703 connections  
• Local loopback diagnostics  
• Internal, External, and G.703 network timing  
• CE approval  
• 100-240VAC & 48VDC power options  
• Conforms to ONP requirements CTR 12 for connection to international  
Telecom networks  
2.2 DESCRIPTION  
The Model 2707 receives clear channel E1/G.703 (2.048 Mbps) data  
from the telco's digital data network. The Model 2707 terminates the  
G.703 telco interface and converts the data for transmission to a user-  
oriented serial (X.21 and V.35). The 2707 can connect to a Router,  
FRAD, PABX or Multiplexer over its serial interface at 2.048 Mbps.  
4
 
     
3.0 CONFIGURATION  
The Model 2707 features configuration capability via hardware DIP  
switches. This section describes all possible DIP switch configurations  
of the Model 2707.  
3.1 DIP SWITCH CONFIGURATION  
The Model 2707 has one internal DIP switch that allow configuration for  
a wide range of applications. The switch is accessed from the underside  
of the 2707. Figure 1 shows the location of the DIP switch on the bottom  
of the printed circuit board.  
Figure 1. Underside of Model 2707, Showing Location of DIP Switches  
The Model 2707 DIP switch can be configured as either “ON” or “OFF”.  
Figure 2 shows the orientation of the DIP switch with respect to ON/OFF  
positions.  
5
 
     
Figure 2. Close up of configuration switches  
Switch SW1-1 through SW1-8  
Table 1: Switch Set 1 Summary  
Position  
Function  
Factory Default  
Selected Option  
SW1-1  
SW1-2  
SW1-3  
SW1-4  
SW1-5  
SW1-6  
Line Code  
LLB  
OFF  
HDB3  
OFF  
OFF  
Reserved  
Reserved  
Reserved  
OFF  
Clock Mode  
Clock Mode  
TM from DTE  
Received  
Recovered  
SW1-7  
SW1-8  
OFF  
OFF  
Received  
Recovered  
Enabled  
Switch SW1-1 Line Coding: HDB3 (default)  
Use Switch SW1-1 to control the Network Line Coding options. Set  
these options to be the same as the Line Coding given to you by your  
Service Provider. If you are using two Model 2707s together as short  
range modems, set both units to HDB3.  
SW1-1  
Line Encoding  
Off  
On  
HDB3  
AMI  
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Options: HDB3, AMI  
HDB3: In this line coding, the transmitter substitutes a deliberate bipolar  
violation when excessive zeros in the data stream are detected. The  
receiver recognizes these special violations and decodes them as zeros.  
This method enables the network to meet minimum pulse density  
requirements. Unless AMI is required in your application, HDB3 should  
be used whenever possible.  
AMI: Alternate Mark Inversion defines a pulse as a “mark, a binary  
one, as opposed to a zero. In an E1 network connection, signals are  
transmitted as a sequence of ones and zeros. Ones are sent as pulses,  
and zeros are sent as spaces, i.e., no pulse. Every other pulse is  
inverted from the previous pulse in polarity, so that the signal can be  
effectively transmitted. This means, however, that a long sequence of  
zeros in the data stream will cause problems, since the NTU receiving  
the signal relies on the signal to recover the 2.048 Mbps clock.  
If you must use AMI, you should ensure that the data terminal equipment  
connected to the unit provides a minimally acceptable pulse density. For  
this reason, there are advantages to using HDB3 instead. AMI coding  
does not inherently account for ones density. To meet this requirement,  
the user should ensure that the data inherently meets pulse density  
requirements.  
SW1-2 Local Loop: Inactive (default)  
Use SW1-2 to activate/deactivate local loopback test.  
Table 2: SW1-2 Local Loop Setting  
SW1-2  
Setting  
Off  
On  
Local Loopback Inactive  
Local Loopback Active  
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SW1-6 and SW1-7 Clock Modes  
Use Switches SW1-6 and SW1-7 to configure the 2707 for internal,  
external, or receive recover clock mode.  
Table 3: SW1-6 and SW1-7 Clock Modes  
SW1-6  
SW1-7  
Clock Mode  
ON  
ON  
ON  
OFF  
ON  
Network (Received Recovered)  
Internal  
OFF  
OFF  
External  
OFF  
Network (Received Recovered)  
Network Clock  
Transmitter timing is derived using  
the received line signal (received  
recovered) from the network.  
Internal Clock  
External Clock  
Transmitter timing is derived from  
an internal clock source.  
Transmitter timing is derived from  
DTE terminal timing.  
SW1-8: Enable/Disable Loop Tests from DTE  
Use Switch SW1-8 to allow Model 2707 to enter loopback tests when the  
DTE raises the appropriate loop request pin.  
SW1-8  
Setting  
Off  
On  
Response to DTE Loopback Request Enabled  
Response to DTE Loopback Request Disabled  
8
 
   
4.0 INSTALLATION  
Once the Model 2707 is properly configured, it is ready to connect to the  
G.703 interface, to the serial port, and to the power source. This section  
describes how to make these connections.  
4.1 CONNECTING TO THE G.703 NETWORK  
The Power, G.703 and serial Line connections are located on the rear  
panel of the Model 2707. The following sections describe operation of  
these connections.  
Connecting the 2707/D (X.21 version) Dual Coaxial Cable (75 Ohm)  
to the G.703 Network  
The Model 2707/D (X.21 version) is equipped with dual female BNCs  
(TX and RX) for connection to a 75 Ohm dual coax G.703 network inter-  
face. If your G.703 network terminates via dual coaxial cable, use the  
diagram below to make the proper connections. (SeeFigure 3).  
Figure 3. Rear Panel, Showing Location of Connectors  
Note The outer conductor of the coax cables are isolated from system  
earth ground.  
When using the 75 Ohm interface, jumper straps JP2, JP6, JP7, and JP5  
must be installed over the jumpers. The jumpers are located next to the  
BNC connectors. Refer to the following section to open the case. Open  
the case and install jumper straps for JP2, JP6, JP7, and JP5.  
Opening the Case  
Open the case by inserting a screwdriver into the slots and twist the  
screwdriver head slightly. The top half of the case will separate from the  
lower half of the case. Take caution not to damage any of the PC board  
mounted components.  
9
 
         
Connecting the Twisted Pair (120 Ohm) to the G.703 Network  
The Model 2707 is equipped with a single RJ-48C jack for connections to  
a 120 Ohm twisted pair G.703 network interface. If your G.703 network  
terminates via RJ-48C, use Figure 4 below to connect the 120 Ohm  
G.703 network channel.  
Figure 4. G.703 120 Ohm Connection  
4.2 CONNECTING THE SERIAL PORT  
The Model 2707/C and D supports V.35, X.21 serial port connections.  
This section describes how to connect the serial ports to your terminal  
equipment.  
Connecting to a “DTE” Device  
The serial port on the 2707/C (V.35 version) is hard-wired as a DCE.  
Therefore these modules “want” to plug into a DTE such as a terminal,  
PC or host. When making the connection to your DTE device, use a  
straight through cable of the shortest possible length—we recommend  
6 feet or less. When purchasing or constructing an interface cable,  
please refer to the pin diagrams in Appendix C as a guide.  
Connecting to a “DCE” Device  
If the Model 2707 serial interface is hard-wired as a DCE (all except the  
X.21 version), you must use a null modem cable when connecting to a  
modem, multiplexer or other DCE device. This cable should be of the  
shortest possible length—we recommend 6 feet or less.  
Configuring the X.21 Interface (2707/D)  
The serial port on the X.21 interface is default wired as a DCE, but may  
be switched to a DTE. This is done by reversing the orientation of the  
DCE/DTE strap, as described below:  
To reverse DCE/DTE orientation, remove the top case. Refer to “Open-  
ing the Case” on page 9.  
10  
 
           
The DCE/DTE strap is located near the DB15 connector on the top side  
of the board. The arrows on the top of the strap indicate the configura-  
tion of the X.21 port (for example, if the DCE arrows are pointing toward  
the DB-15 connector, the X.21 port is wired as a DCE). Reverse the  
DCE/DTE orientation by pulling the strap out of its socket, rotating it  
180º, then plugging the strap back into the socket. You will see that the  
DCE/DTE arrows now point in the opposite directions, showing the new  
configuration of the X.21 port.  
Note If the 2707/D is configured as a DTE, the clocking mode must  
be set for external clock.  
4.3 POWER CONNECTION  
Universal AC Power (100-240VAC)  
The Model 2707 uses a 5VDC, 2A universal input 100-240VAC, power  
supply (center pin is +5V). The universal input power supply has a male  
IEC-320 power entry connector. This power supply connects to the  
Model 2707 by means of a barrel jack on the rear panel. Many interna-  
tional power cords are available for the universal power supply.  
The Model 2707 powers up as soon as it is plugged into an AC outlet--  
there is no power switch.  
11  
 
   
DC Power  
The 36-60 VDC DC to DC adapter is supplied with the DC version of the  
Model 2707. The black and red leads plug into a DC source (nominal  
48VDC) and the barrel power connector plugs into the barrel power sup-  
ply jack on the 2707. (See Figure 5).  
To Power  
To -48VDC  
Supply Jack  
Source  
-Vin  
Black lead (-V)  
Red lead (+V)  
+Vin  
Barrel power connector  
Figure 5. Connecting DC Power to the 2707 DC Power Supply  
There are no user-serviceable parts in the power  
supply section of the Model 2707. Contact Patton  
ElectronicsTechnical support at +1 (301) 975-  
E-mail at [email protected], for more infor-  
WARNING  
mation.  
12  
 
 
5.0 OPERATION  
When the Model 2707 has been properly configured and installed, it  
should operate transparently. This sections describes power-up, LED  
status monitors, and the built-in loopback test modes.  
5.1 POWER-UP  
Before applying power to the Model 2707, please read section 4.3,  
“Power Connection” on page 11 and ensure that the unit is properly  
connected to the appropriate power source.  
5.2 LED STATUS MONITORS  
The Model 2707 features six front panel LEDs that monitor connections  
on the G.703 and signaling, error and test modes. Figure 6 shows the  
front panel location of each LED. Descriptions of each LED follow Figure  
6.  
Figure 6. 2707 Front Panel  
E1 Link  
(Active Green) Solid green (On) indicates that  
the end to end E1 Link is up, signifying that the  
link is active. The E1 Link LED is Off when the  
link is down.  
TD & RD  
TM  
Glows yellow to indicate an idle condition of  
Binary “1” data on the respective terminal inter-  
face signals. Green indicates Binary “0” data.  
(Active Yellow) Solid Yellow indicates an  
Active Test Mode. The unit may be placed  
in test mode by the local user.  
13  
 
       
5.3 LOCAL LOOP DIAGNOSTICS  
The Model 2707 offers V.54 loop diagnostics. Use these diagnostics to  
test the NTU and any communication links. This test can be activated  
via DIP switches or via signals on the Model 2707 serial port interface.  
Operating Local Loopback (LL)  
The Local Loopback (LL) test checks the operation of the local Model  
2707, and is performed separately on each unit. Any data sent to the  
local Model 2707 in this test mode will be echoed (returned) to the user  
device (i.e., characters typed on the keyboard of a terminal will appear  
on the terminal screen)  
.
Figure 7. Local Loopback for a Network Termination Application  
To perform a LL test, follow these steps:  
1. Activate LL. This may be done in one of two ways:  
– Place the DIP switch SW1-2 to the “ON” position.  
– Activate the “LLsignal on the DTE (2707/C only). If you are not  
sure which lead is the “LLsignal, please refer to Appendix C.  
2. Verify that the data terminal equipment is operating properly and can  
be used for a test.  
14  
 
   
APPENDIX A  
MODEL 2707, G.703 SPECIFICATIONS  
Network Data Rate:  
2.048 Mbps  
Network Connector:  
Nominal Impedance:  
Line Coding:  
RJ-48C/Dual Coax BNC (2707/D)  
75/120 Ohm  
Selectable AMI or HDB3  
G.703 (Unframed)  
Line Framing:  
Clocking:  
Internal or Network (Receive Recover)  
Distance:  
Maximum 1.8 km (6,000 ft.) on 24 AWG  
Cable  
Configuration:  
Power Supply:  
One 8-Position DIP Switches  
+5VDC External power supply/100-240VAC,  
50-60Hz, 0.4A; or 48VDC Power Supply  
Humidity:  
Up to 90% non-condensing  
0 to 50˚ C  
Temperature:  
Dimensions:  
9.0 x 5.3 x 2.0 cm (3.5”L x 2.1”W x 0.78”H)  
15  
 
 
APPENDIX B  
MODEL 2707, INTERFACE PIN ASSIGNMENT  
V.35 Interface  
(M/34F Female Connector)  
(DCE Configuration)  
Pin #  
Signal  
SGND (Signal Ground)  
B
C
D
E
RTS (Request to Send)  
CTS (Clear to Send)  
DSR (Data Set Ready)  
CD (Carrier Detect)  
F
H
L
DTR (Data Terminal Ready)  
LLB (Local Line Loop)  
TM (Test Mode)  
M
N
P
RDL (Remote Digital Loop)  
TD (Transmit Data)  
R
S
RD (Receive Data)  
TD/ (Transmit Data-B)  
RD/ (Receive Data-B)  
XTC (External Transmit Clock)  
RC (Receive Timing)  
XTC/ (External Transmit Clock)  
RC/ (Receive Timing)  
TC (Transmit Clock-A)  
TC/ (Transmit Clock-B)  
T
U
V
W
X
Y
AA  
16  
 
 
APPENDIX B - Continued  
V.35 TO V.35 (STRAIGHT-  
THROUGH CABLE) PIN  
OUT  
V.35 TO V.35 (CROSS OVER  
CABLE) PIN OUT  
PIN  
Function  
PIN  
Function  
PIN  
A
B
Frame Ground  
Signal Ground  
RTS  
A
B
Frame Ground  
Signal Ground  
DCD  
A
B
C
D
E
C
D
E
F
NC  
NC  
D
H
C
E
DSR  
DTR  
F
DCD  
F
RTS  
H
K
DTR  
H
K
DSR  
NC  
NC  
K
L
NC  
L
NC  
L
P
TD (A)  
RD (A)  
TD (B)  
RD (B)  
SCTE (A)  
RT (A)  
SCTE (B)  
RT (B)  
NC  
P
RD (A)  
TD (A)  
RD (B)  
TD (B)  
RT (A)  
SCTE (A)  
RT (B)  
SCTE (B)  
NC  
R
P
R
S
R
S
T
T
T
S
U
V
U
V
V
U
X
W
X
W
X
W
Y
Y
Y
AA  
NC  
AA  
NC  
AA  
17  
 
APPENDIX C  
MODEL 2707, INTERFACE PIN ASSIGNMENT  
X.21 Interface  
(DB-15 Female Connector)  
(DTE/DCE Configuration)  
Pin #  
Signal  
1
2
Frame Ground  
T (Transmit Data-A)  
C (Control-A)  
3
4
R (Receive Data-A)  
I (Indication-A)  
5
6
S (Signal Element Timing-A)  
BT (Byte Timing-A)  
SGND (Signal Ground)  
T/ (Transmit Data-B)  
C/ (Control-B)  
7
8
9
10  
11  
12  
13  
14  
R/ (Receive Data-B)  
I/ (Indication-B)  
S/ (Signal Element Timing-B)  
BT/ (Byte Timing-B)  
18  
 
 
APPENDIX D  
MODEL 2707, FACTORY REPLACEMENT PARTS  
AND ACCESSORIES  
Model #  
Description  
2707/C  
2707/D  
G.703 NTU with a V.35 interface  
G.703 NTU with an X.21 interface  
G.703 NTU w/ 10Base-T EN interface  
American Power Cord  
2707/I  
0805US  
0805EUR  
0805UK  
0805AUS  
0805DEN  
0805FR  
0805IN  
European Power Cord CEE 7  
United Kingdom Power Cord  
Australia/New Zealand Power Cord  
Denmark Power Cord  
France/Belgium Power Cord  
India Power Cord  
0805IS  
Israel Power Cord  
0805JAP  
0805SW  
08055DCUI  
07M2707  
Japan Power Cord  
Switzerland Power Cord  
Universal Input Power Supply  
User Manual  
Copyright © 2006  
Patton Electronics Company  
All Rights Reserved.  
19  
 
 

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