USER
MANUAL
MODEL 2701RC Series
NetLink-E1
TM
E1/Fractional E1
CSU/DSU Rack Card
An ISO-9001
Certified
Company
07M2701RC
Doc# 08613U2-001
Rev. E
Revised 6/16/06
SALES OFFICE
(301) 975-1000
TECHNICAL SUPPORT
(301) 975-1007
CONTENTS
1.0 Warranty Information ................................................................. 5
1.1 Warranty Statement...................................................................... 5
1.2 Radio and TV Interference............................................................ 5
1.3 CE Notice...................................................................................... 6
1.4 Service.......................................................................................... 6
2.0 General Information.................................................................... 7
2.1 Features........................................................................................ 7
2.2 General Product Description......................................................... 7
3.0 Configuration .............................................................................. 9
3.1 DIP switch configuration............................................................... 9
3.2 Switches S1-1 through S1-8....................................................... 10
Switch S1-1 Line Coding............................................................ 10
HDB3 ................................................................................... 10
AMI. ..................................................................................... 11
S1-2 and S1-3 Clock Modes....................................................... 11
Network Clock ..................................................................... 11
Internal Clock ...................................................................... 11
External Clock ..................................................................... 11
Switch S1-4 through S1-8: DTE data rate.................................. 11
3.3 Switches S2-1 through S2-8....................................................... 13
Switch S2-1: CAS Multiframe..................................................... 13
Switch S2-2: CRC-4 Multiframe.................................................. 13
Switch S2-3: Remote Digital Loopback Type............................. 14
Switch S2-4: RDL Response...................................................... 14
Switch S2-5: Test mode request from DTE................................ 14
Switch S2-6: Front Panel Switches ............................................ 15
Switch S2-7: VT-100 or NMS Selection...................................... 15
Switch S2-8: Impedance............................................................. 15
3.4 Switches S3-1 through S3-8....................................................... 15
Switch S3: DIP switch or NMS (network management
system)/VT-100 control .............................................................. 15
Hardware reset. ................................................................... 16
NMS/VT-100 Control. ..........................................................16
Setting the card address. .................................................... 17
3.5 DCE/DTE selector (X.21 version only) ....................................... 18
3.6 Configuring the rear interface card............................................. 18
Model 1001RCM12548C Strap Settings .................................... 20
DTE Shield (DB-25 Pin 1) & FRGND (JB3) ......................... 21
SGND & FRGND (JB4) ....................................................... 21
Model 1001RCM13448C Strap Settings .................................... 22
DTE Shield (M/34 Pin A) & FRGND (JB3). .........................23
SGND & FRGND (JB4). ...................................................... 23
Model 1001RCM11548C Strap Settings .................................... 23
DTE Shield (DB-15 Pin 1) & FRGND (JB3) ......................... 24
SGND & FRGND (JB4) ....................................................... 25
2
Model 1001RCM11575 Strap Settings....................................... 25
3.7 VT-100 software Configuration................................................... 26
Accessing the Menu System...................................................... 26
Introduction to Main Menu.......................................................... 29
System Configuration................................................................. 30
System Diagnostics.................................................................... 35
NI status ..................................................................................... 38
Receiver Carrier Loss [RCL]. ..............................................38
Current DIP Switch Settings ................................................ 39
Unit Options................................................................................ 39
4.0 Installation................................................................................. 42
The Rack Power Supply............................................................. 42
Powering up your 1001R14 rack................................................ 42
4.1 Installing the Model 2701RC into the chassis............................. 43
4.2 Connecting to a DTE device....................................................... 43
4.3 Connecting to a DCE device....................................................... 43
4.4 Connecting the E1 interface ....................................................... 44
4.5 Connecting dual-coax BNC (75 ohm)......................................... 44
5.0 Operation................................................................................... 45
5.1 LED descriptions......................................................................... 45
5.2 Loop (V.54 & Telco) Diagnostics................................................ 46
Operating Local Loopback (LL).................................................. 47
Operating Remote Digital Loopback (RL)................................... 48
CSU Loop................................................................................... 49
5.3 Bit error rate (V.52) diagnostics.................................................. 49
A Specifications ........................................................................... 51
A.1 Network Data Rate ...................................................................... 51
A.2 Network Connector ..................................................................... 51
A.3 Nominal Impedance ................................................................... 51
A.4 DTE Interface .............................................................................. 51
A.5 Line Coding ................................................................................ 51
A.6 Line Framing ............................................................................... 51
A.7 CAS Multiframing ........................................................................ 51
A.8 CRC-4 Multiframing .................................................................... 51
A.9 Clocking ...................................................................................... 51
A.10 DTE Data Rates .......................................................................... 51
A.11 Time Slot Rate ............................................................................. 52
A.12 DS0 Start Position ....................................................................... 52
A.13 DS0 Mapping Position ................................................................ 52
A.14 Diagnostics ................................................................................. 52
A.15 Indicators .................................................................................... 52
A.16 Configuration .............................................................................. 52
A.17 Power Supply .............................................................................. 52
A.18 Humidity ...................................................................................... 52
A.19 Temperature ............................................................................... 52
A.20 Dimensions ................................................................................. 52
3
B Cable Recommendations......................................................... 53
C Factory replacement parts and accessories.......................... 54
D E1 Interface Pin Assignment ................................................... 55
E V.35 interface pin assignment ................................................. 56
F EIA-530 interface pin assignment ........................................... 57
G X.21 interface pin assignment................................................. 58
4
1.0 WARRANTY INFORMATION
Thank you for your purchase of 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 Patton Electronics Technical Services at
1.1 WARRANTY STATEMENT
Patton Electronics
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. This product contains no serviceable parts; therefore the user shall not attempt to
modify the unit in any way. 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
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.
ranties, expressed or implied, and the installation or use of this product
shall be deemed an acceptance of these terms by the user. In the event
the user detects intermittent or continuous product malfunction due to
nearby high power transmitting radio frequency equipment, the user is
strongly advised to use only data cables with an external outer shield
bonded to a metal or metalized connector.
warrants all Model 2701RC Series components to
Patton Electronics
Patton Electronics
(301) 975-1007
Patton Electronics
specifically disclaims all other war-
product. This
.
be liable
1.2 RADIO AND TV INTERFERENCE
The Model 2701RC generates and uses radio frequency energy, and if
not installed and used properly-that is, in strict accordance with the manufacturer’s instructions-may cause interference to radio and television
reception. The Model 2701RC has been tested and found to comply with
the limits for a Class A computing device in accordance with specifications in Subpart B of Part 15 of FCC rules, which are designed to provide
reasonable protection from such interference in a commercial installation. However, there is no guarantee that interference will not occur in a
particular installation. If the Model 2701RC does cause interference to
radio or television reception, which can be determined by disconnecting
the unit , the user is encouraged to try to correct the interference by one
or more of the following measures: moving the computing equipment
away from the receiver, re-orienting the receiving antenna and/or plugging the receiving equipment into a different AC outlet (such that the
computing equipment and receiver are on different branches).
5
1.3 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 European Union (EU). A Certificate of Compliance is available by contacting Technical Support.
1.4 SERVICE
All warranty and nonwarranty repairs must be returned freight prepaid
and insured to Patton Electronics. All returns must have a Return Materials Authorization number on the outside of the shipping container. This
number may be obtained from Patton Electronics Technical Services at:
• Tel:
+1 (301) 975-1007
• Email:
• URL:
Note
support@patton.com
http://www.patton.com
Packages received without an RMA number will not be
accepted.
6
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 arise during installation or use of the
unit, contact Patton Electronics Technical Services at (301) 975-1007.
2.1 FEATURES
• Terminates E1/FE1 circuits over a 4-wire RJ-48C interface
• Connects to standard CPE serial and 10Base-T interfaces
• Common framed nx64 rates up to1984 kbps (G.704)
• Unstructured rate of 2.048 Mbps (G.703)
• G.703 or G.704 framing (with or without CRC-4, CAS multiframe)
• Selectable AMI or HDB3 line coding
• Configuration via internal DIP switches, software control port, or
SNMP management of local unit through the 1001MC
• Nine easy-to-read LED indicators monitor data & diagnostics
• Internal, external, network clocking
• Also operates as a high-speed point-to-point modem
• Fits into Patton’s 2U rack-mount chassis
• Made in USA
• Conforms to ONP requirements CTR12 and CTR13 for connection to
international telecom networks
2.2 GENERAL PRODUCT DESCRIPTION
The Model 2701RC Series are single port E1/FE1 CSU/DSUs that provide
high-speed W AN connectivity in a r ac k card pac kage . Connecting to the
serial W AN port of a switch, router or multiplex er , the NetLink-E1™ pro vides
E1 or FE1 access connection at data rates of 2.048 Mbps and nx64. The
Netlink-E1™ is an excellent choice when terminating leased line services,
Frame Rela y bac kbones , internet access as well as LAN-to-LAN services.
The Netlink-E1™ provides digital access to local WAN services between
two facilities ov er a dedicated 4-Wire circuit. WAN bandwidth, framing and
coding options are programmed via internally accessible DIP switches, via
a VT-100 type terminal using a Model 1001CC control card, or SNMP man-
7
agable through the 1001MC. With a 1001CC card, a terminal can manage
addressable 2701RC cards using menu driven controls. The Netlink-E1™
uses AMI and HDB3 line coding. Netlink-E1™ also supports a full range of
system and diagnostic features that make system setup easy.
The NetLink-E1™ provides E1 terminations over a modular RJ-48C jack
or dual 75 Ohm BNC connectors when using the Model 1001RCM11575
(X.21 interface with dual BNC connectors). Pow er options include a single
AC or DC or redundant AC/DC.
8
3.0 CONFIGURATION
The 2701RC features configuration capability via hardware DIP switches,
a software control port, or SNMP through the 1001MC. This section
describes all possible hardware and software switch configur ations of the
network connection.
Note
The 2701RC factory default is set to DIP switch control. Software control can be enabled either through the control port or
SNMP management station. Performing a hardware reset sets
the unit for dip switch control.
3.1 DIP SWITCH CONFIGURATION
The Model 2701RC has three 8-bit DIP switches that allow configuration f or
a wide range of applications. The switches are accessed by removing the
card from the chassis. Figure 1 shows the location of the DIP switches on
the top of the printed circuit board.
Figure 1.
Model 2701RC Series top view showing location of DIP switches
DIP Switches S1, S2, and S3 can be configured as either “On” or “Off”.
Figure 2 shows the orientation of the DIP switches with respect to ON/OFF
positions. Default position and descriptions for Switches S1, S2, and S3
are provided on the following pages .
Figure 2.
Close-up of DIP switches showing ON/OFF positions
9
Note
Hardware reset allows users to put the 201RC under switch
control. You may force the unit to use the DIP switches as the
default configuration source by turning off the unit, setting all the
S3 DIP switches to the ON position, then powering on the unit.
This will cause the unit to enter a special mode. Then turn off the
unit and change the switch settings to the off position. When y ou
turn the unit on again, the unit will be set up with the selected
switch settings.
3.2 SWITCHES S1-1 THROUGH S1-8
A detailed description of each switch (S1-1 through S1-8) setting follows
Table 1.
Table 1:
Switch set 1 summary table
Position Function
Factory
Default
Selected
Option
S1-1 Line code OFF HDB3
S1-2 Clocking Mode ON Internal
S1-3 Clocking Mode OFF Internal
S1-4 Data Rate OFF
S1-5 Data Rate OFF 2.048 Mbps
S1-6 Data Rate OFF Clear Channel
S1-7 Data Rate OFF
S1-8 Data Rate OFF
Switch S1-1 Line Coding
Use switch S1-1 to control the network line coding options. Set these
options to be the same as the line coding given to you by y our service provider. If you are using two Model 2701RCs together as short range
modems, set both units to HDB3.
S1-1 Line Encoding
OFF HDB3
ON 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.
10
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 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.
S1-2 and S1-3 Clock Modes
Set switch S1-2 and S1-3 to determine the 2701RC’s transmitter timing.
S1-2 S1-3 Clock mode
On On Network (Recieved Recovered)
On Off Internal
Off On External
Off Off Network (Recieved Recovered)
Network Clock.
nal (received recovered) from the network.
Internal Clock.
source.
External Clock.
Transmitter timing is derived using the received line sig-
Transmitter timing is derived from an internal clock
Transmitter timing is derived from DTE terminal timing.
Switch S1-4 through S1-8: DTE data rate
Use switches S1-4 through S1-8 to set the DTE data rate (see Table 2 on
page 12.
11
Table 2:
DTE data rate settings
SW-4 SW-5 SW-6 SW-7 SW-8 Speed
On On On On On 64 kbps
Off On On On On 128 kbps
On Off On On On 192 kbps
Off Off On On On 256 kbps
On On Off On On 320 kbps
Off On Off On On 384 kbps
On Off Off On On 448 kbps
Off Off Off On On 512 kbps
On On On Off On 576 kbps
Off On On Off On 640 kbps
On Off On Off On 704 kbps
Off Off On Off On 768 kbps
On On Off Off On 832 kbps
Off On Off Off On 896 kbps
On Off Off Off On 960 kbps
Off Off Off Off On 1024 kbps
On On On On Off 1088 kbps
Off On On On Off 1152 kbps
On Off On On Off 1216 kbps
Off Off On On Off 1280 kbps
On On Off On Off 1344 kbps
Off On Off On Off 1408 kbps
On Off Off On Off 1472 kbps
Off Off Off On Off 1536 kbps
On On On Off Off 1600 kbps
Off On On Off Off 1664 kbps
On Off On Off Off 1728 kbps
Off Off On Off Off 1792 kbps
On On Off Off Off 1856 kbps
Off On Off Off Off 1920 kbps
On Off Off Off Off 1984 kbps
Off Off Off Off Off Clear Channel 2048 kbps
Note
When the data rate is set to 2.048 Mbps, the unit is forced into
G.703 mode, and it transmits user data on all 32 time-lots. There
is no framing information; therefore, the CRC4 MF (SW2-2)
switch is ignored. In all other rate settings, the unit employs
G.704 framing; TS0 is reserved for signaling.
12
Table 3:
Switch set 2 summary table
Position Function Factory Default Selected Option
S2-1 CAS MF Off Disabled
S2-2 CRC-4 multiframe Off Disabled
S2-3 RDL T ype Off V.54
S2-4 RDL Response On Disabled
S2-5 TM from DTE On Disabled
S2-6 Front Panel Switch Off Enabled
S2-7 NMS/VT-100 Switch Off NMS
S2-8 Line build out Off 120 ohms
3.3 SWITCHES S2-1 THROUGH S2-8
Switch S2-1: CAS Multiframe
CAS multiframe uses Timeslot 16 (TS16) to send multiframe (MF) alignment data. In CAS MF, a MF is defined as 16 frames, where a fr ame consists of 32 64-kbps timeslots, numbered 0 to 31. TS16 of the first frame in
the MF contains the CAS MF alignment word in the upper four bits. The
alignment word is always 0000 (binary). The 2701RC does not perform
any signaling in TS16 other than to insert the MF alignment word, in
order to maintain MF alignment. When CAS MF disabled, the unit transmits user data in TS16; therefore, up to 31 channels are available for
user data. When it is enabled, TS16 is not available to the user. In this
case, the user can use up to 30 channels for data. CAS MF can be used
with CRC-4 MF or by itself. When enabled, both units must employ CAS
MF; if one unit is set f or CAS MF, and the other is not, the one using CAS
MF will detect a loss of sync.
Switch S2-2: CRC-4 Multiframe
In framed mode, S2-2 is used for CRC-4 MF. When CRC-4 is enabled,
the unit monitors the incoming data stream for CRC-4 errors. It transmits
CRC-4 error counts to the transmitting unit.. When using timeslot zero
(TS0), excessive errors may cause loss of frame or loss of sync. If CRC4 MF is used, both units must be set for set for CRC-4 MF. Otherwise , the
one using CRC-4 MF will detect loss of sync.
S2-2 Option
Off CRC-4 Disabled
On CRC-4 Enabled
13
Switch S2-3: Remote Digital Loopback Type
The user can set this switch to select the type of remote loop that will be
initiated by the Model 2701. If set to V.54, the Model 2701 will initiate a
V.54 loop when Remote Loop is selected by the front panel switches. If
set to CSU, the Model 2701 will initiate a CSU loop when Remote Loop
is selected by the front panel switches.
S2-3 RDL Type
Off Initiate a V.54 RDL loop when selected
On Initiate a CSU loopback when selected
Switch S2-4: RDL Response
V.54 and CSU Loopbacks are special in-band loopback facility that sends
a pseudo-random pattern over the data stream. This is useful f or campus
applications when you need to put a remote unit in loopback. The unit
responds to the V.54 loopback command, and the whole process takes
only a few seconds to complete. When V.54 Loopback is disabled, the
unit will not be able to send or respond to V.54 or CSU loopback commands. The duration of the loopback is limited by the loopback timeout
setting.
S2-4 Option
Off RDL Response Enabled
On RDL Response Disabled
Switch S2-5: Test mode request from DTE
Use Switch S2-5 to allow Model 2701RC to enter loopback tests when
the DTE raises the appropriate loop request pin.
S2-5 Setting
Off Response to DTE Loopback Request Enabled
On Response to DTE Loopback Request Disabled
14
Switch S2-6: Front Panel Switches
As the front panel switches may be inadvertently toggled, or in the event
that the end-user may not need to use the switches , the installer ma y disable the front panel switches. Set switch S2-6 to determine whether the
front-panel toggle switches are enabled or disabled.
S2-6 Option
Off Front Panel Switches Enabled
On Front Panel Switches Disabled
Switch S2-7: VT-100 or NMS Selection
Switch S2-7 selects the configuration mode that the G.703 Access Rack
Card uses. When VT-100 is selected, configuration and status can be
setup through a VT-100 terminal using a 1001CC. When NMS (network
management station) is selected, configuration and status can be setup
and maintained through SNMP using a 1001MC. Please refer to the
1001MC user manual when using this mode.
Note
DIP switch configuration can be used regardless of the setting of
this switch. The DIP switches are enabled through the VT-100
screens, NMS, or by performing a hardware reset.
S2-7 Management Selection
Off NMS control
On VT-100 control
Switch S2-8: Impedance
Switch S2-8 is used to select the line build out for the Model 2701RC.
When using the 1001RCM11575 (dual BNC) rear card, set S2-8 to OFF.
When using a 120 ohm cable with RJ-45 connectors, set S2-8 to ON.
S2-8 Setting
75 ohm On
120 ohm Off
3.4 SWITCHES S3-1 THROUGH S3-8
Switch S3: DIP switc h or NMS (netw ork management system)/VT-100 control
The Model 2701RC can be configured and managed via DIP switches or
NMS/VT-100 through a Patton Model 1001MC card or 1001CC card,
respectively (refer to the 1001MC or 1001CC user manuals when using
15
this mode). Switch S3 selects control and management mode for the
Model 2701RC.
Table 4:
DIP switch S3 settings
S3-1 to S3-8 Management selection
All Off DIP switch control (factory default)
All On Hardware reset
Hardware reset.
The Model 2701RC is set at the factory for DIP switch
control. If the user has changed control to NMS/VT-100, and then needs
to revert to DIP switch control, use the following procedure:
1. Pull the Model 2701RC out of the rack. Make a note of the DIP S1,
S2, and S3 settings.
2. Set S3 switches to the ON position.
3. Install the card into the rack and power up the unit.
4. Pull the card out again and change the switches to the desired set-
tings. The unit is now under DIP switch control.
5. Install the card back into the rack.
NMS/VT-100 Control.
When switches S3-1 to S3-8 are set to a setting
other than the ones shown in Table 4, the Model 2701RC enters NMS/
VT-100 control. While under NMS/VT-100 control, each of the Model
2701RC cards housed in a rack must have an address. Table 5 and
Figure 3 show examples of address settings. The table follows the hexadecimal system, where switch S3-1 is the least significant bit (LSB), and
S3-8 is the most significant bit (MSB). A switch in the On position represents binary zero, and Off represents binary one (see Figure 3).
Table 5:
Examples of the address settings
Hex Address
(Decimal Address)
S3-8 S3-7 S3-6 S3-5 S3-4 S3-3 S3-2 S3-1
0x01 (1) ON ON ON ON ON ON ON OFF
0x02 (2) ON ON ON ON ON ON OFF ON
0x10(16) ON ON ON OFF ON ON ON ON
0xB5(181) OFF ON OFF OFF ON OFF ON OFF
16
Figure 3.
Sample DIP switch settings
Setting the card address.
Table 5 and Figure 3 show examples of how
to set a card address using switches S3-1 through S3-8. The addresses
are listed in their hexadecimal (hex) and corresponding decimal values.
17
Figure 4.
DCE/DTE selector strap location
3.5 DCE/DTE SELECTOR (X.21 VERSION ONLY)
The X.21 version of the 2701RC can be set up as a DCE (default) or
DTE device by using a DCE/DTE selector strap (see Figure 4). The information in Table 6 describes configuring the DCE/DTE strap.
Table 6:
DCE/DTE selector settings
Setting Description
DCE To set a rack card as a
selector with the
DCE
device, install the DCE/DTE
DCE
arrows pointing toward the front
panel.
DTE T o set a rack card as a
selector with the
DTE
device, install the DCE/DTE
DTE
arrows pointing toward the front
panel.
3.6 CONFIGURING THE REAR INTERFACE CARD
The Model 2701RC Series has five interface card options: the Model
1001RCM12548C (DB-25/RJ-48C), the Model 1001RCM13448C (M/34/
RJ-48C), the Model 1001RCM11548C (DB-15/RJ-48C), the Model
1001RCM11575 (DB-15/Dual BNC), and the Model IM2RC/IA (RJ-45/
18
10Base-T RJ-48C). Each of these options supports one DTE interface
connection and one 4-wire line connection. Figure 5 illustrates the interface options for the Model 2701RC Series.
Figure 5.
Note
The 2701RC Series function card is paired with a specially
designed rear card and must not be swapped with other Patton
rear cards.
Model 2701RC Series interface card options
Prior to installation, you will need to examine the rear card you have
selected and make sure it is properly configured for your application.
Each rear card is configured by setting straps located on the PC board.
To configure the rear cards, you must set the configuration straps.
Figure 6 shows the orientation of these straps. Each strap can either be
on pegs 1 and 2, or on pegs 2 and 3.
Figure 6.
Orientation of Interface Card Straps
The following sections describe the strap locations and possible settings
for each rear card.
19
Model 1001RCM12548C Strap Settings
Figure 7 shows strap locations for the Model 1001RCM12548C (DB-25)
rear cards. These straps determine various grounding characteristics for
the terminal interface and twisted pair lines. JB3 and JB4 are user configurable.
Figure 7.
1001RCM125XX strap locations.
Table 7 provides an overview of interface strap functions for the rear
interface cards. Following the table overview are detailed descriptions of
each strap’s function.
Table 7:
Interface Card Strap Summary
Strap Function Position 1&2 Position 2&3
JB3 DTE Shield (Pin1) & FRGND Connected* Open
JB4 FRGND & SGND Connected* Open
* Indicates default setting
20
DTE Shield (DB-25 Pin 1) & FRGND (JB3).
In the connected position,
this strap links DB-25 pin 1 & frame ground. In the open position, pin 1 is
disconnected from frame ground (see Table 8)
Table 8:
JB3 strap settings
Position Description
1 & 2 SGND (Pin 7) and FRGND Connected through a 100 ohm resistor
2 & 3 DTE Shield (Pin 1) and FRGND Not Connected
SGND & FRGND (JB4).
In the connected position, this strap links DB-25
pin 7 (Signal Ground) and frame ground through a 100 ohm resistor. In
the open position, pin 7 is connected directly to frame ground (see
Table 9)
Table 9:
JB4 strap settings
Position Description
1 & 2 SGND (Pin 7) and FRGND Connected through a 100 ohm resistor
2 & 3 SGND (Pin 7) and FRGND Directly Connected
21
Model 1001RCM13448C Strap Settings
Figure 8 shows the strap location for the Model 1001RCM13448C (M/34)
rear card. This strap determines whether Signal Ground and Frame
Ground will be connected.
Figure 8.
1001RCM13448C strap locations.
Table 10 provides an overview of interface strap functions for the rear
interface cards. Following the table overview are detailed descriptions of
each strap’s function.
Table 10:
Interface Card Strap Summary
Strap Function Position 1&2 Position 2&3
JB3 DTE Shield (Pin A) & FRGND Connected* Open
JB4 FRGND & SGND (Pin B) Connected* Open
* Indicates default setting
22
DTE Shield (M/34 Pin A) & FRGND (JB3). In the connected position, this strap links M/34 pin A & frame ground. In the open position, pin A is disconnected from frame ground (see Table 11).
Table 11:
JB3 strap settings
Position Description
1 & 2 DTE Shield (Pin A) and FRGND Connection
2 & 3 DTE Shield (Pin A) and FRGND Not Connected
SGND & FRGND (JB4). In the connected position, this strap links Signal Ground and frame ground through a 100 ohm resistor. In the open position, signal ground is disconnected from frame ground (see Table 12).
Table 12:
JB4 strap settings
Position Description
1 & 2 SGND and FRGND Connected
2 & 3 SGND and FRGND Not Connected
Model 1001RCM11548C Strap Settings
Figure 9 on page 24 shows strap locations for the Model
1001RCM11548C (DB-15) rear cards. These straps determine various
grounding characteristics for the terminal interface and twisted pair lines.
JB3 and JB4 are user configurable.
23
Figure 9.
1001RCM11548C strap locations.
Table 13 provides an overview of interface strap functions for the rear
interface cards. Following the table overview are detailed descriptions of
each strap’s function.
Table 13:
Interface Card Strap Summary
Strap Function Position 1&2 Position 2&3
JB3 DTE Shield (Pin1) & FRGND Connected* Open
JB4 FRGND & SGND (Pin 8) Connected* Open
* Indicates default setting
DTE Shield (DB-15 Pin 1) & FRGND (JB3). In the connected position,
this strap links DB-15 pin 1 & frame ground. In the open position, pin 1 is
disconnected from frame ground (see Table 14).
Table 14:
JB3 strap settings
Position Description
1 & 2 DTE Shield (Pin 1) and FRGND Connected
2 & 3 DTE Shield (Pin 1) and FRGND Not Connected
24
SGND & FRGND (JB4). In the connected position, this strap links DB-15
pin 8 (Signal Ground) and frame ground through a 100 ohm resistor. In
the open position, pin 8 is connected directly to frame ground
(see Table 15).
Table 15:
JB4 strap settings
Position Description
1 & 2 SGND (Pin 8) and FRGND Connected through a 100 ohm resistor
2 & 3 SGND (Pin 8) and FRGND Directly Connected
Model 1001RCM11575 Strap Settings
Figure 10 shows strap locations for the Model 1001RCM11575 (DB-15/
Dual BNC) rear cards. Figure 10 shows strap locations for the Model
1001RCM11575 (DB-15) rear cards. These straps determine various
grounding characteristics for the terminal interface and twisted pair lines.
JB3 and JB4 are user configurable.
Figure 10.
1001RCM11575 strap locations.
25
.
Table 16:
Interface Card Strap Summary
Strap Function Position 1&2 Position 2&3
JB3 DTE Shield (Pin1) & FRGND Connected* Open
JB4 FRGND & SGND (Pin 8) Connected* Open
* Indicates default setting
3.7 VT-100 SOFTWARE CONFIGURATION
This section describes the VT-100 configuration using a 1001CC. For
information on configuration using SNMP through the 1001MC, please
refer to the 1001MC user manual.
The NetLink-E1™rack card features a VT-100 menu-driven system that
may be used for local configuration and management. Cards are configured and managed by setting a separate address for each card using
hardware switches and then accessing each card using a rack mounted
NetLink Model 1001CC control card. The software management system
is described below. For more information on the Model 1001CC, please
refer to the Model 1001CC user manual.
Note
The Model 1001CC uses an internal bus to communicate with
the 2701RC. When using software configuration, the rear card
for the 2701RC should be configured with FRGND and SGND
connected. Please see section 3.2 for more information on configuring your rear card.
Accessing the Menu System
1. Set the Card Address as described in Section 3.2.1.
2. Set S2-7 to the ON position to select VT-100 control.
3. Power up the terminal and set its RS-232 port as follows:
9600 Baud
8 data bits, 1 stop bit, no parity
Local echo off
ANSI or VT-100 emulation
26
4. Here is an example of a terminal emulator setup session. In normal
font are the various parameter types. In bold type are the values that
should be used for best results. Your terminal program’s setup
screen may differ from this one:
5. Install the 2701RC and the 1001CC Control Card into the rack sys-
tem (see Section 4.0 Installation, page 32, to install the 2701RC;
see the 1001CC User Manual to Install the Model 1001CC Card and
to connect the RS-232 port).
6. After your 2701RC units are installed and you have set up your
Model 1001CC and VT-100 terminal as described above, you are
ready to access the 2701RC cards. This is done by selecting the
address for a card using the command “Ctrl-b” address <CR>. For
example, if your 2701RC has an address of “64”, type the following:
Ctrl b
(Hold down the Ctrl key and depress the ‘b’ character)
064
(Type in the address ‘64’)
<CR>
(Depress the ‘Enter/Carriage Return’ key)
27
The password prompt will be displayed as shown below.
Note
The password is case sensitive. Type the password and press
<Enter>. The factory default password for the unit is:
patton
Note
If the entry is incorrect, the password screen will clear and
prompt you again for the correct password. The password you
enter will not be shown. For security, asterisks will be displayed
for each letter you type. The maximum length of the password,
which can include any character the terminal can generate, is 16
characters.
7. The NetLink-E1™ will then display the Main Menu screen.
28
Introduction to Main Menu
After entering the password, you may access all of the system’s functions and parameters. The Main Menu looks like this:
1. To make a selection, key the highlighted letter that corresponds to a
menu selection.
2. To execute the selection, type [Enter/CR].
3. To toggle between options on a highlighted selection, Press [space].
4. Select Save Changes from Main Menu after making modifications to any Model 2701RC parameter. Otherwise, changes will be
lost when the Model 2701RC is turned off.
The Main Menu options are briefly described below:
System Configuration
of the Model 2701RC operation, e.g., framing, line coding, and
aggregate bandwidth.
System Diagnostics/Statistics
network performance, initiate V.54 loops, local loops, and send test
patterns. Network perf ormance parameters are updated once a second, giving you the ability to quickly determine if there is a problem.
Unit Options
location. You can change the default header names to give each unit
enable you to customize the Model 2701RC for your
options allow you to change various aspects
options allow you to monitor the
29
a unique name and password. Also, you can reset the unit to its
default settings without the manual. It also has a Service Information
screen in case you need technical assistance from Patton.
Save Changes
tion, you can save the changes permanently by executing the Save
Changes command. This will update the unit’s configuration and
save all the parameters to permanent memory.
Logoff
. F or security, log off the control menu by executing the Logoff
command. This will blank the screen until an [Enter] key is pressed.
. Once you have configured the unit to your satisfac-
System Configuration
The System Configuration menu looks like this:
The System Configuration options are described below:
Line Format
Options:
G.703:
equal to the line rate at the network interface (NI). CAS MF and
CRC-4 are disabled.
G.704:
imum data rate depends on whether CAS MF is enabled or not.
: G.703
(default)
G.703, G.704
G.703 is unframed, 2.048Mbps. In this case, the DTE rate is
G.704 reserves TS0 for signaling and frame alignment. Max-
30
Line Coding
: HDB3
(default)
Options:
HDB3:
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:
one, as opposed to a zero. In a 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.
Clocking
Options:
Network:
to a carrier’s network. In this mode, the unit recovers the clock from
the received signal and uses it to transmit data. In this way the unit
remains synchronized to a master clock. In campus applications,
one of the units must be set to Internal clock, and the other end is
set to Network clock. At all times, there must be only one clock
source. Otherwise, clock slips and framing errors and bit errors may
occur.
AMI, HDB3
In this line coding, the transmitter substitutes a deliberate
Alternate Mark Inversion defines a pulse as a "mark,” a binary
: Network
(default)
Network, Internal, External
This is the most commonly used setting when connecting
Internal:
unit is not connected to the public telephone network directly. In this
mode, the unit uses the on-board oscillator as the transmit clock
source.
External:
via the external clock pin on the DTE interface connector. Most
applications will use Network or Internal clock modes.
Line Build Out
This is commonly used in campus applications, where the
In this mode, the unit requires a clock signal from the DTE
: 120 ohm
(default)
31
Options:
120 ohm, 75 ohm
120 ohm
75 ohm
nectors)
CRC-4 Setting
Options:
CRC-4 Multiframe
information. It operates independently of CAS MF. When CRC-4 is
enabled, the unit monitors the incoming data stream for CRC-4
errors. It transmits CRC-4 error counts to the transmitting unit .
Excessive errors may cause loss of frame or loss of sync. If CRC-4
MF is used, both units must be set for CRC-4 MF; otherwise, the
one using CRC-4 MF will detect a loss of sync.
CAS MF Setting
Options:
CAS MF
frame (MF) alignment data. In CAS MF, a MF is defined as 16
frames, where a frame consists of 32 64kbps timeslots, numbered 0
to 31. TS16 of the first frame in the MF contains the CAS MF alignment word in the upper four bits. The alignment word is always 0000
(binary). The 2715 does not perform any signaling in TS16 other
than to insert the MF alignment word, in order to maintain MF alignment. When CAS MF disabled, the unit transmits user data in TS16;
therefore, up to 31 channels are available for user data. When it is
enabled, TS16 is not available to the user. In this case, the user can
use up to 30 channels for data. CAS MF can be used with CRC-4
MF or by itself. When enabled, both units must employ CAS MF; if
one unit is set for CAS MF, and the other is not, the one using
: Use with 120 ohm RJ-48C connector.
: Use with the 1001RCM11575 rear card. (Dual BNC con-
: Disabled
(default)
Enabled, Disabled
: CRC-4 Multiframe uses TS0 to carry CRC-4
: Disabled
(default)
Enabled, Disabled
: CAS multiframe uses Timeslot 16 (TS16) to send multi-
V.54 Loops
Options:
This is a special in-band loopback facility that sends a special
pseudo-random pattern over the data stream. This is the only loopback that the unit can initiate. This is useful for campus applications
when you need to put a remote unit in loopback. The unit responds
to the V.54 loopback command, and the whole process takes only a
few seconds to complete. When V.54 Loopback is disabled, the unit
will not be able to send or respond to V.54 loopback commands. The
: Enabled
(default)
Enabled, Disabled
32
duration of the loopback is limited by the loopback timeout setting.
While V.54 is being activated, user data is overwritten.
Default Config Source
Options:
EEPROM, Switch
: Switch
(default)
The Model 2701RC can be initialized via the configuration in the onboard permanent memory (EEPROM) or via the internal DIP
switches (Switch). Once the unit is po wered up , y ou ma y change the
settings through the control port or the DIP switches. When you
make changes through the control port, no changes will take place
or be saved to permanent memory until you Save Changes (Main
Menu option "d" + [Enter]). When you make changes through the
switches, all changes are made immediately.
Note
If you do not have a terminal, you may force the unit to use the
DIP switches as the default configuration source by turning off
the unit, setting all the DIP switches to the ON position, then
powering on the unit. This will cause the unit to enter a special
mode. Then turn off the unit and change the switch settings to
the desired settings. When you turn the unit on again, the unit
will be set up with the selected switch settings.
DS0 Channel Configuration Menu
2,048k/na]
(default)
.
[Bandwidth/# Channels =
The Channel Configuration Menu has a sub-menu that looks like
this:
2701RC
33
You may configure the Model 2701RC to operate with any combination of active and inactive DS0 channels in this screen. When you
execute the Save Changes command, the selected settings will be
saved to permanent memory, and the system will be updated to
operate with the new channel settings.
Note
In Unframed format, the Bandwidth Selected will display
“2.048k,” and the Total Channels will display “na.” When using
the DIP switches to set the bandwidth, the starting channel is
always channel 1 or 0.
34
Front Panel Switches
: enabled
(default)
Options:
enabled, disabled
As the front panel switches may be inadvertently toggled, or in the
event that the end-user may not need to use the switches, the
installer may disable the front panel switches. Set switch S2-6 to
determine whether the front-panel toggle switches are enabled or
disabled.
S2-6 Option
On Front Panel Switches Enabled
Off Front Panel Switches Disabled
System Diagnostics
The System Diagnostics/Statistics screen looks like this:
Note
This screen is updated once per second.
35
The System Diagnostics/Statistics options and functions are described
below.
Local Loop Idle
The Local Loop is a bi-lateral loopback in which the data from the
local DTE and the data from the remote unit are looped back to their
respective sources (See section 5.3, “Bit error rate (V.52) diagnostics” on page 49). Activate this loop to test the each of the DTE’s
connection to the Model 2701RC.
The Local Loop test has four states:
Idle
LL
Off
LocP
Remote Loop Idle
The Remote Digital Loopback (RDL) test checks the performance of
both the local and remote Model 2701RCs, as well as the communication link between them. Data from the local DTE is sent across the
entire communication circuit and looped back to the local DTE.
The Model 2701RC Initiating a RL can be in one of the following
states:
(default)
No user-controlled loopbacks are active.
The Model 2701RC is in local loopback mode.
The Model 2701RC is in remote loopback mode or send-
ing a pattern. Local loopback is disabled.
The Model 2701RC is in Local Loopback mode, and is
sending a test pattern.
(default)
Idle
TxPr
WtAk
RxAk
Tout
No user-controlled loopbacks are active.
The Model 2701RC is sending the preparatory phase
pattern lasting for approximately 2–5 seconds.
The Model 2701RC is waiting for an acknowledgement
from the remote unit. If the remote unit does not
respond, the WtAk message will remain on the screen.
The Model 2701RC has received an acknowledgement
from the remote unit.
The Model 2701RC is waiting before entering the
Remote Loopback test mode.
36
TM
The Model 2701RC has successfully negotiated the
Remote Loopback test and is in control of the remote
unit. You may send a test pattern at this point by pressing:
d <spacebar>
TxTr
Tx1s
TxP
IdlP
The Model 2701RC receiving a RL can be in one of the following
states:
RxPr
Sack
RL
RxTr
WE1s
The Model 2701RC is sending a Terminate Loopback
message to the remote unit. If the remote unit does not
respond, the local unit will return to the Idle state.
If the remote Model 2701RC responds to the local Model
2701RCs terminate loopback request, the local unit then
sends an all ones pattern before returning to the Idle
state
The Model 2701RC is sending a test pattern while in Test
Mode
The Model 2701RC is sending a test pattern in place of
data. The Model 2701RC is not in test mode.
The Model 2701RC is receiving a preparatory pattern.
The Model 2701RC, upon receiving a preparatory pat-
tern, sends an acknowledgement message.
The Model 2701RC is in remote loopback mode.
The Model 2701RC is receiving a terminate loopback
message.
The Model 2701RC is waiting for a sequence of all ones
and will time out if it does not receive it.
IdleP
Off
RDL Type
Options:
The user can set this switch to select the type of remote loop that
will be initiated by the Model 2701. If set to V.54, the Model 2701 will
initiate a V.54 loop when Remote Loop is selected by the front panel
The Model 2701RC is sending a QRSS, 511 or 2047 pattern.
The Model 2701RC is in local loopback.
: V.54
(default)
V .54
or
CSU
37
switches. If set to CSU , the Model 2701 will initiate a CSU loop when
Remote Loop is selected by the front panel switches.
S2-3 RDL Type
Off Initiate a V.54 RDL loop when selected
On Initiate a CSU loopback when selected
Test Pattern
Options:
To send a pattern, press the ‘c’ key and press <spacebar> to send
the test pattern. The “OK” message indicates the received test pattern is error-free. The “BE” message indicates errors in the received
pattern. You may also hear a beep (from your termainal) once a second as long as the unit detects a bit error in the pattern.
Idle
Indicates that Model 2701RC is not sending a pattern.
Sending
Error Insertion
Options: On,
You may inject intentional errors into the test pattern by turning Error
Insertion ON. The Error (ERR) LED will blink once per second.
: Idle
(default)
Idle
or
Sending
Indicates that Model 2701RC is sending a pattern.
Off
(default)
Off
Selected Pattern
Options:
Use this option to select the test pattern used to test the link.
QRSS, 511
, or
2047
NI status
The network interface (NI) status is shown in
the middle of the Diagnostics/Statistics
screen. The brackets are empty when the link
is operating normally. Only one error message is provided.
Receiver Carrier Loss [RCL]. Occurs when 255 consecutive zeros hav e been detected at the network interface. RCL clears when a pulse is detected.
38
Current DIP Switch Settings. The switch settings
are displayed here to facilitate troubleshooting your
unit without opening up the unit first.
Unit Options
The Unit Options screen looks like this (factory
default):
Header Line 1
and
Header Line 2
Headers 1 and 2 are provided for easy identification of your unit after
installation. You may want to give each unit a unique name via the
header lines to help distinguish one unit from another. You can enter
a header up to 40 letters long. Two lines provide 80 letters for your
use. That’s a lot of flexibility!
Password
The Password facility provides security by allowing only those who
know the correct password to configure the unit via the control port.
You can still configure the unit via the DIP switches. The password
can be up to 16 characters long, with no restriction on the combination of characters you can use, so be sure to remember the password. The password is case sensitive. If you lose your password,
you will lose the ability to access the unit via the control port.
39
Loop Timeout
The Loop Timeout setting can be set to one of the following:
00:05 = five minutes
00:10 = ten minutes
00:15 = fifteen minutes
00:30 = thirty minutes (default setting)
00:45 = forty-five minutes
01:00 = one hour
01:30 = 90 minutes
02:00 = two hours
03:00 = three hours
NEVER = forever—the unit will remain in loopback without user
intervention.
Tx Data Clock
Options:
Switch S2-7 selects the clock that is used to accept the Transmit
Data from the DTE interface. Standard DTE interfaces will transmit
data with respect to the External Clock. In some cases a DTE interface will transmit with respect to the Transmit clock sent out from the
2701RC. Please review the information provided with your DTE
equipment for more information on its' operation. In most cases
when there are errors on the line only in the direction of the transmit
data, S2-7 can be changed to solve the problem.
: Internal Tx Clock
Internal Tx Clock
(default)
or
External Tx Clock
S2-7 Tx Clock Select
Off Transmit data accept with respect to the
transmit clock from the 2701RC
On Transmit data accept with respect to the
external clock from the DTE
40
Set to Default Configuration
You may set the Model 2701RC to its factory default configuration,
except for the header lines and the password, by executing the Set
to Default Configuration command.
Service Information
If you need to contact us for help, you can view the Service Information screen. Here is what it looks like:
2701RC
41
4.0 INSTALLATION
This section describes the functions of the Model 1001R14 rack chassis,
tells how to install front and rear Model 2701RC Series cards into the
chassis, and how to connect to the twisted pair interface and the serial
interface.
The Model 1001R14 Rack Chassis
The Model 1001R14 Rack Chassis (see Figure 11) has 14 or 16 device
card slots, plus a single power supply or dual redundant power supplies.
Measuring only 3.5” high, the Model 1001R14 is designed to occupy only
2U in a 19” rack. Sturdy front handles allow the Model 1001R14 to be
extracted and transported conveniently.
Figure 11.
Model 1001R14 Rack Chassis with power supply
The Rack Power Supply
The power supply included in the Model 1001R14 rack uses the same
mid-plane architecture as the modem cards. The front card of the power
supply slides in from the front, and the rear card slides in from the rear.
They plug into one another in the middle of the rack. The front card is
then secured by thumb screws and the rear card by conventional metal
screws.
There are no user-serviceable parts in the power supply section of the Model 1001R14 rack. Volta ge setting changes and fuse replacement should only be
performed by qualified service personnel. Contact
Patton Electronics Technical support at +1 (301) 9751007, via our web site at www .patton.com, or by E-
WARNING
mail at support@patton.com, for more information.
Powering up your 1001R14 rack
The power supplies that come with your 1001R14 rack system are
equipped with a power entry connector on the rear power supply card.
The power supplies are hot-swappable, so you are not required to
remove the cards from the rack while applying power to the system.
42
Note
Please refer to the Model 1001R14 Series User Manual AC and
DC Rack Mount Power Supplies for fuse and power card
replacement information.
4.1 INSTALLING THE MODEL 2701RC INTO THE CHASSIS
The Model 2701RC is comprised of a front card and a rear card. The tw o
cards meet inside the rack chassis and plug into each other by way of
mating 50 pin card edge connectors. Use the following steps as a guideline for installing each Model 2701RC into the rack chassis:
1. Slide the rear card into the back of the chassis along the metal rails
provided.
2. Secure the rear card using the metal screws provided.
3. Slide the card into the front of the chassis. It should meet the rear
card when it’s almost all the way into the chassis.
4. Push the front card gently into the card-edge receptacle of the rear
card. It should “click” into place.
5. Secure the front card using the thumb screws.
Note
Since the Model 1001R14 chassis allows “hot swapping” of
cards,
it is not necessary to power down the rack
install or remove a Model 2701RC.
when you
4.2 CONNECTING TO A DTE DEVICE
The serial port on most rear interface cards are hard-wired as “DCE”
(Data Circuit Terminating Equipment). The interfaces are designed to
plug into a DTE such as a terminal, PC or host computer. 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, refer to the pin diagrams in
Appendix D on page 55, Appendix E on page 56, Appendix F on
page 57, and Appendix G on page 58 as guides.
4.3 CONNECTING TO A DCE DEVICE
The rear interface cards on most interface modules are hard wired as
“DCE”. Therefore, you must use a null modem cable when connecting to
a modem or other DCE device. When purchasing or constructing a null
modem interface cable, use the pin diag rams in Appendix E on page 56,
Appendix F on page 57, and Appendix G on page 58 as a guide.
Note
Pin-out requirements for null modem applications vary between
equipment manufacturers. If you have any questions about a
43
specific installation, please contact Patton Electronics Technical
Support.
4.4 CONNECTING THE E1 INTERFACE
The Network Line Interface is an eight position keyed modular jack configured as a RJ-48C (see Figure 12). This interface will need to be configured to match the line parameters (i.e. framing, line coding, etc.)
supplied by the central office.
Signal NameRJ-48C Jack
1
(RX) Receive (Ring)
1
2
3
4
5
6
7
8
2
(RX) Receive (Tip)
3
Shield
4
(TX) Transmit (Ring)
5
(TX) Transmit (Tip)
6
Shield
7
No connection
8
No connection
Figure 12.
Note
If the NetLink-E1™ is being used for private short range modem
applications, the twisted pair cable connected to its port will
need to be a cross-over cable. See Appendix D on page 55 for
interface pin assignments.
NetLink-E1™ twisted pair line interface
4.5 CONNECTING DUAL-COAX BNC (75 OHM)
In addition to the 120 ohm twisted pair connection, the Model 2701RC,
when used with the 1001RCM11575 rear card, is equipped with dual
female BNCs (TX and RX) for connection to a 75 ohm dual coax G.703
network interface.
44
5.0 OPERATION
Once the NetLink-E1™ is installed and configured properly it is ready to
place into operation. This section describes the function of the LED indicators, and the use of the loopback and pattern test modes.
5.1 LED DESCRIPTIONS
The NetLink-E1™ is equipped with nine LED indicators that monitor the
status of communication. Figure 13 shows the location of the LEDs on
the NetLink-E1™ Series front panel.
Model 2701RC
Power
TXD
RXD
ALM
TST
Remote Local
LOS
ERR
PAT PAT /E
Figure 13.
Model 2701RC front panel, showing LED indicators
45
TXD
RXD
LOS
ALM
ERR
TST
PWR
When the unit sends a one, the TXD LED is green. When it
sends a zero, the TXD LED is yellow. Moreover, the TXD LED
is active only in active DS0 channels. In inactive channels, the
TXD LED is off.
When the unit receives a one, the RXD LED is green. When it
receives a zero, the RXD LED is yellow. Moreover, the RXD
LED is active only in active DS0 channels. In inactive channels, the RXD LED is off.
The Loss of Sync LED lights when the unit loses synchronization with the incoming signal. This ma y happen when there is a
framing mismatch or a loss of signal. In unframed mode, the
LOS LED monitors the status of the transmit clock.
The alarm LED indicates the presence of a Blue or Yellow
Alarm, or Out of Frame condition. The ALM LED will blink on
every half-second. Alarms may occur due to:
• Loss of Synchronization
• Loss of Frame
• AIS (Blue Alarm)
• RAI (Yellow Alarm)
The error LED indicates various error conditions, including
framing bit errors, excessive zeros, controlled slips, severe
errors, or bit errors (when sending V.52 test patterns). When
sending a test pattern, the LED will remain lit if the unit does
not receive the identical pattern. When it receives the correct
pattern, the LED will turn off. If error insertion is on, the LED
will blink once a second if everything is operating properly.
The test indicator LED blinks with a specific pattern depending
on the type of test mode. When the unit is in local analog loop,
the LED will blink on briefly. When the unit is in remote loop,
the TST LED will blink off briefly. When the unit is sending a
test pattern or is putting the remote unit into V.54/CSU loopback, the TST LED will stay on. These are the test modes:
• V.54/CSU Loopback & V.52 Patterns
• Local Loopback
The power indicator LED will remain lit while the unit is pow-
ered. It turns off when the unit is not powered.
5.2 LOOP (V.54 & TELCO) DIAGNOSTICS
The NetLink-E1™ offers three V.54 loop diagnostics and is compatible
with two Telco loop diagnostics. Use these diagnostics to test the CSU/
DSU and any communication links. These tests can be activated via the
software control port (see “System Diagnostics” on page 35), via signals
on the serial port interface or the front panel switch.
46
Operating Local Loopback (LL)
The Local Loopback (LL) test checks the operation of the local NetLinkE1™, and is performed separately on each unit. Any data sent to the
local NetLink-E1™ in this test mode will be echoed (returned) back to the
user device (i.e., characters typed on the keyboard of a terminal will
appear on the terminal screen).
G.703/G.704 NTU
Model 2701 RC
Receive
Recover
Clocking
Data
Model 2701 RC
LLB Initiated
Serial
Device
Clock/
Data
Clock/
Data
G.703/G.704 NTU
Model 2701 RC
Internal
Clocking
Model 2701RC
Figure 14.
Cable Span
Local loopback
To perform a LL test, follow these steps:
1. Activate LL. This may be done in one of the following ways:
— If using the 1001CC card, enter
Local Loop
from the Sys-
tem Diagnostics/Statistics menu and toggle the <Spacebar>
until “LL” appears next to the
Local Loop
option.
— Activate LL from the HTTP browser screens when using the
model 1001MC card
— Activate the “LL” signal on the DTE. If you are not sure which
lead is the “LL” signal, refer to Appendix D on page 55.
Serial
Device
Clock/
Data
Data
— Toggle the front panel switch to the “Local” position.
2. Verify that the data terminal equipment is operating properly and
can be used for a test.
3. Perform a V.52 BER (bit error rate) test as described in section 5.3,
“Bit error rate (V.52) diagnostics” on page 49. If the BER test equipment indicates no faults, but the data terminal indicates a fault, follow the manufacturer’s checkout procedures for the data terminal.
Also, check the interface cable between the terminal and the
NetLink-E1.
47
Operating Remote Digital Loopback (RL)
The Remote Digital Loopback (RL) test checks the performance of both
the local and remote NetLink-E1™, as well as the communication link
between them. Any characters sent to the remote NetLink-E1™ in this
test mode will be returned back to the originating device (i.e, characters
typed on the keyboard of the local terminal will appear on the local terminal screen after having been passed to the remote NetLink-E1™ and
looped back).
Figure 15.
Remote loopback
There are two Remote Loops that can be initiated from the NetLink-E1
unit:
• V.54 Loop
• CSU Loop
The user can select the type of loop that can be initiated from the System
Diagnostics/Statistics screen or with Switch S2-1. Select “c” RDL Type
and press the <spacebar> to toggle between the CSU loop and the V.54
loop. When a loopback is initiated this is the type of loop that the unit
uses to loop up the remote unit.
Note
The NetLink-E1 will respond to both loops regardless of the
state of the RDL Type.
To perform an RDL test, follow these steps:
1. Activate RDL. This may be done in one of the following ways:
— Using the 1001CC, enter
Remote Loop
from the System
Diagnostics/Statistics menu and toggle the <Spacebar> until
“RL” appears next to the
Remote Loop
option.;
48
— Activate RL from the HTTP browser screens when using the
1001MC card
— Activate the “RL” signal on the DTE. If you are not sure which
lead is the “RL” signal, please refer to section Appendix D, “E1
Interface Pin Assignment” on page 55.
— Set the front panel switch to ‘Remote’.
2. Perf orm a bit error rate test (BERT) using the internal V.52 generator
(as described in section 5.3, “Bit error rate (V.52) diagnostics” on
page 49), or using a separate BER Tester. If the BER test indicates a
fault, and the Local Line Loopback test was successful for both
NetLinks, you may have a problem with the twisted pair line connection.
CSU Loop
The NetLink-E1™ also responds to central office initiated loop commands. The NetLink-E1 will implement the “loop up” command when it
recognizes the pattern “10000” in the data stream for a minimum of 5
seconds. The “loop down” command is implemented by the pattern “100”
in the data stream for a minimum of 5 seconds.
The NetLink-E1 will respond to Universal Loopback De-activate to clear
all central office loops.
5.3 BIT ERROR RATE (V.52) DIAGNOSTICS
The NetLink-E1 offers three V.52 Bit Error Rate (BER) test patterns.
These test patterns may be invoked along with the LAL and RDL tests to
evaluate the unit(s) and the communication links.
When a 511 or 2047 test is invoked, the NetLink-E1 gener ates a pseudorandom bit pattern of 511 bits, 2047 bits or 220 bits, respectively, using a
mathematical polynomial. The receiving NetLink- E1 then decodes the
received bits using the same polynomial. If the received bits match the
agreed upon pseudo-random pattern, then the NetLink-E1™(s) and the
communication link(s) are functioning properly.
511
2047
To perform a V.52 test, follow these steps:
1. Activate the local loopback or remote loopback diagnostic.
Initiates a built-in 511 bit pseudo-random pattern
generator and detector.
Initiates a built-in 2047 bit pseudo-random pattern
generator and detector.
49
2. Activate the test pattern. This may be done in one of following ways:
— Enter
menu and toggle the <Spacebar> until the desired test pattern
appears.
One of two result codes will appear to the right of the
Pattern
OK
BE
erately insert errors in the pattern, toggle
ON).
— Using the HTTP/SNMP screens, select the appropriate test pat-
tern.
— Toggle the front panel switch to either PAT or PAT/E (Test Pat-
tern with Error Injection).
Test Pattern
from the System Diagnostics/Statistics
Test
listing:
—Indicates that the received test pattern is error-free.
—Indicates that there are errors in the test pattern (to delib-
Error Insertion
to
50
APPENDIX A
SPECIFICATIONS
A.1 NETWORK DATA RATE
2.048 Mbps
A.2 NETWORK CONNECTOR
RJ-48C or dual BNC
A.3 NOMINAL IMPEDANCE
120 ohm (75 ohm available when using Patton Model 1001RCM11575
rear card)
A.4 DTE INTERFACE
V.35 (DCE Orientation) X.21 (DCE or DTE orientation), RS-530, 10BaseT, Ethernet
A.5 LINE CODING
Selectable AMI or HDB3
A.6 LINE FRAMING
G.703 (Unframed) or G.704/G.732 (Framed)
A.7 CAS MULTIFRAMING
Selectable On or Off
A.8 CRC-4 MULTIFRAMING
Selectable On or Off
A.9 CLOCKING
Internal, External, or Receive Recover
A.10 DTE DATA RATES
64, 128, 192, 256, 320,384, 448, 512, 576, 640, 704, 768, 832, 896, 960,
1024, 1088, 1152, 1216, 1280, 1344, 1408, 1472, 1536, 1600, 1664,
1728, 1792, 1856, 1920, 1984, 2048 kbps
51
A.11 TIME SLOT RATE
64 kbps
A.12 DS0 START POSITION
Arbitrary (when using VT-100 or SNMP management).
A.13 DS0 MAPPING POSITION
Contiguous, or Arbitrary (when using VT-100 or SNMP management).
A.14 DIAGNOSTICS
V.54 Loopback; V.52 Patterns: 511, 2047
A.15 INDICATORS
Power, Transmit Data, Receive Data, Alarm, Loss of Sync, Test Mode,
Error
A.16 CONFIGURATION
Three 8-Position DIP Switches, RS-232 Control Port, or SNMP Managable
A.17 POWER SUPPLY
Provided by 1001R14 rack.
A.18 HUMIDITY
Up to 90% non-condensing.
A.19 TEMPERATURE
0–50°C (32–122°F).
A.20 DIMENSIONS
9.0L x 5.3W x 2.0H cm (3.5L x 2.1W x 0.78H in.).
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APPENDIX B
CABLE RECOMMENDATIONS
The Patton NetLink E1™ Series has been performance tested by Patton
technicians using twisted-pair cable with the following characteristics:
Wire Gauge Capacitance Resistance
19 AWG 83nf/mi or 15.72 pf/ft. 0.0163 ohms/ft.
22 AWG 83nf/mi or 15.72 pf/ft. 0.0326 ohms/ft.
24 AWG 83nf/mi or 15.72 pf/ft. 0.05165 ohms/ft.
To gain optimum performance from the Model 2701RC Series, please
keep the following guidelines in mind:
•
Always
use
twisted-pair
• Use twisted pair wire with a capacitance of 20pf/ft or less.
• Avoid twisted pair wire thinner than 26 AWG (i.e. avoid AWG numbers
higher than 26)
• Use of twisted pair with a resistance greater than the above specifica-
tions may cause a reduction in maximum distance obtainable. Functionality should not be affected.
• Many environmental factors can affect the maximum distance obtain-
able at a particular site.
wire—this is not an option.
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APPENDIX C
FACTORY REPLACEMENT PARTS AND ACCESSORIES
Patton Model # Description
2701RC/D/V E1/FE1 CSU/DSU Rack Card, X.21 Interface with
DB15FS/RJ48C rear card
2701RC/B/B E1/FE1 CSU/DSU Rack Card, RS530 Interface
with DB25F/RJ48C Rear Card
2701RC/A/I E1/FE1 CSU/DSU Rack Card, V.35 Interface with
M/34F/RJ48C Rear Card
1001RPEM-RAC 90/260V Rear Power Entry Module
1001RPEM-RAC 90/260V Rear Power Entry Module
1001RPSM-RUI 90/260V Front Power Supply Module
1001RPEM-RDC DC Rear Power Entry Module
1001RPSM-R48A 48V Front Power Supply Module
1001R14P Rack 14 Slot 2U Chassis Only
1001R14P/R48V Rack 14 Slot 2U with Dual Universal Input 48 VDC
Power Supplies
1001R14P/RUIA Rack 14 Slot 2U with Dual Universal Input 90–260
VAC Power Supplies, European Power Cord
1001R14P/RUIC Rack 14 Slot 2U with Dual Universal Input 90–260
VAC Power Supplies, Austrialia Power Cord
1001R14P/RUID Rack 14 Slot 2U with Dual Universal Input 90–260
VAC Power Supplies, UK Power Cord
1001R14P/RUIG Rack 14 Slot 2U with Dual Universal Input 90–260
VAC Power Supplies, India Power Cord
1001R14P/RUIK Rack 14 Slot 2U with Dual Universal Input 90–260
VAC Power Supplies, US Power Cord
1001RCM12548C DB-25/RJ-45 Rear Card
1001RCM13448C M/34/RJ-45 Rear Card
1001CC Control Card
IM2RC/B RS-530 Interface Rear Card
05R16BP440W Single Width Blank Rear Panel, White
05R16FP440W Single Width Blank Front Panel, White
0516FPB1 Single Width Blank Front Panel, Black
0516FPB4 4-Wide Blank Front Panel, Black
0516RPB1 Single Width Blank Rear Panel, Black
0516RPB4 4-Wide Blank Rear Panel, Black
056S1 Set of 16 #4 pan head screws/washers
10-25M/35M-1 Cable, 6 ft, DB-25 male to M/34 male
1010-10 Terminal Block, 2 Position, Male
07M2701RC User Manual
54
APPENDIX D
E1 INTERFACE PIN ASSIGNMENT
RJ-48C E1 (DS0) Network Interface
(Female Modular Jack)
Pin # Signal
1 RX Data (RING)
2 RX Data (TIP)
4 TX Data (RING)
5 TX Data (TIP)
55
APPENDIX E
V.35 INTERFACE PIN ASSIGNMENT
M/34 Connector, Terminal Interface
Pin # Signal
A GND (Earth Ground/Shield)
B SGND (Signal Ground)
D CTS (DCE Source)
E DSR (DCE Source, Always On)
F CD (DCE Source)
L LL (Local Loop, DTE Source)
M TM (Test Mode Indicator, DCE Source)
N RL (Remote Loop, DTE Source)
P TD (Transmit Data +, DTE Source)
R RD (Receive Data +, DCE Source)
S TD/ (Transmit Data -, DTE Source)
T RD/ (Receive Data -, DCE Source)
U XTC (Transmit Clock +, DTE Source)
V RC (Receiver Clock +, DCE Source)
W XTC/ (Transmit Clock -, DTE Source)
X RC/ (Receiver Clock -, DCE Source)
Y TC (Transmitter Clock +, DCE Source)
AA TC/ (Transmitter Clock -, DCE Source)
56
APPENDIX F
EIA-530 INTERFACE PIN ASSIGNMENT
DB-25 Female Connector, Terminal Interface
Pin # Signal
1 FG (FrameGround)
2 TD (Transmit Data-A, DTE Source)
3 RD (Receive Data-A, DCE Source)
4 RTS (Request to Send-A, DTE Source)
5 CTS (Clear to Send-A, DCE Source)
6 DSR (Data Set Ready-A, DCE Source)
7 SGND (Signal Ground)
8 CD (Carrier Detect-A, DCE Source)
9 RC/ (Receiver Clock-B, DCE Source)
10 CD/ (Carrier Detect-B, DCE Source)
11 XTC/(External Transmitter Clock-B, DTE Source)
12 TC/(Transmitter Clock-B, DCE Source)
13 CTS/(Clear to Send-B, DCE Source)
14 TD/(Transmit Data-B, DTE Source)
15 TC(Transmitter Clock-A, DCE Source)
16 RD (Receive Data-B, DCE Source)
17 RC (Receiver Clock-A, DCE Source)
18 LL (Local LIne Loop, DTE Source)
19 RTS/(Request to Send-B, DTE Source)
20 DTR (Data Terminal Ready-A, DTE Source)
22 DSR/ (Data Set Ready-B, DCE Source)
23 DTR/(Data Terminal Ready-B, DTE Source)
24 XTC (External Transmitter Clock-A, DTE Source)
25 TM (Test Mode)
57
APPENDIX G
X.21 INTERFACE PIN ASSIGNMENT
DB-15 Female Connector
(DTE /DCE Configuration)
Table 17:
Pin # Signal
1 Frame Ground
2 T (Transmit Data-A)
3 C (Control-A)
4 R (Receive Data-A)
5 I (Indication-A)
6 S (Signal Element Timing-A)
7 BT (Byte Timing-A)
8 SGND (Signal Ground)
9 T/ (Transmit Data-B)
10 C/ (Control-B)
11 R/ (Receive Data-B)
12 I/ (Indication-B)
13 S/ (Signal Element Timing-B)
14 BT/ (Byte Timing-B)
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Copyright © 2006
Patton Electronics Company
All Rights Reserved.
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