USER
MANUAL
MODEL 2715RC
NetLink-E1:
E1/Fractional E1 NTU
Rack Mount Card
SALES OFFICE
(301) 975-1000
TECHNICAL SUPPORT
(301) 975-1007
http://www.patton.com
Part# 07M2715RC
Doc# 08607U2-001
Rev. C
Revised 1/22/08
An ISO-9001
Certified Company
PATTON MODEL 2715RC
TABLE OF CONTENTS
Section
Page
1.0 General Information...............................................................2
1.1 Warranty Statement
1.2 Radio and TV Interference
1.3 CE and Telecommunication Approvals
1.4 Servie
2.0 General Information...............................................................4
2.1 Features
2.2 Description
3.0 Configuration .........................................................................5
3.1 Front card Configuration
3.2 Configuring the 1000RCM13348C Rear Card
4.0 Installation ..........................................................................11
4.1 The Model 1001R14 rack Chassis
4.1.1 The Rack Power Supply
4.2 Installing the Model 2715RC Into the Chassis
4.3 V.35 Terminal Connection
4.4 Connecting the Network and the V.35 Interfaces
4.4.1 Network Interface Connection
5.0 Operation.............................................................................14
5.1 Power-Up
5.2 LED Status Monitors
5.3 Loop (V.54) Diagnostics
5.3.1 Operating Local Loopback (LL)
5.3.2 Operating Remote Digital Loopback (RL)
5.4 Bit Error Rate (V.52) Diagnostics
Appendix A - Specifications ........................................................18
Appendix B - Factory Replacement Parts and Accessories.......19
Appendix C - Interface Pin Assignments....................................20
1 2
1.3 CE AND TELECOMMUNICATION APPROVALS
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 Certificate of Compliance is available by contacting Technical
Support.
The Model 2715RC is in compliance with the Telecommunication
technical requirements CRT-12; 2.048 Mbps digital unstructured
leased line (D2048U) attachment requirements for terminal equipment
interface.
The Model 2715RC also meets the Telecommunication technical
requirements CTR-13; 2.048 Mbps digital structured leased lines
(D2048S) attachment requirements for terminal equipment interface.
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
Support: (301) 975-1007; http://www.patton.com; or, support@pat-
ton.com.
NOTE: Packages received without an RMA number will not be
accepted.
Patton Electronics' technical staff is also available to answer any
questions that might arise concerning the installation or use of your
Model 2715RC. Technical Service hours: 8AM to 5PM EST, Monday
through Friday.
3 4
3.0 CONFIGURATION
Two cards make up a single Model 2715RC G.703 Converter - a
front function card and a rear interface card. Each may require configuration depending upon the product application. This section describes
the location and orientation of the Model 2715RC’s configuration
switches and jumpers, and provides descriptions for all settings.
3.1 FRONT CARD CONFIGURATION
The Model 2715RC front card has a single bank of eight DIP
switches located on the top of the printed circuit board. Figure 1,
below, shows the position of the switches on the board.
Changing the DIP Switch Settings
Figure 2 shows the orientation of the DIP switches with respect to the
“ON” and “OFF” positions.
5
Figure 1. Model 2715RC board, showing DIP switch location
DIP Switch
ON OFF
8
1
Figure 2. Close up of the configuration switches
NOTE: The ON position is oriented toward the front of the Model 2715RC.
ON
OFF
Front Panel
DIP Switches S1 - S8
The configuration switches on S1 - S8 may be set to allow configuration for a wide range of applications. Default settings of S1 through
S8 are shown in the table below. Descriptions of each switch follow
the table.
Switch SW1: Line Coding
Use Switch SW1 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 2715RCs together as
short range modems, set both units identically, preferably to HDB3.
SW4
Line Framing & Coding
Off HDB3
On AMI
Line Coding Options:
High Density Bipolar 3 (HDB3): In HDB3 coding, the transmitter
deliberately inserts a 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. Use HDB3 unless AMI is required in your application .
Alternate Mark Inversion (AMI): 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.
6
SWITCH SET SUMMARY TABLE
Position Function Factory Default Selected Option
SW1 Line Coding Off HDB3
SW2 CAS Multiframe Off Disabled
SW3 CRC-4 MF/Clock Mode Off Disabled
SW4 Clock Mode Off Network
SW5 DTE Rate Off
SW6 DTE Rate Off
SW7 DTE Rate Off
SW8 DTE Rate Off
2.048 Mbps
Clear
Channel
}
Switch SW2: CAS Multiframe
CAS multiframe uses Timeslot 16 (TS16) to send multiframe (MF)
alignment data. In CAS MF, a multiframe is defined as 16 frames,
where a frame consists of 32 64kb/s 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
2715RC does not perform any signaling in TS16 other than to insert
the MF alignment word, in order to maintain MF alignment. When CAS
MF is 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 ennabled, both units must employ CAS MF; if one unit is set for CAS MF,
and the other is not, the one using CAS MF will detect a loss of sync.
SW2
Option
Off Disabled
On Enable
Switch SW3 & SW4: CRC-4 Multiframe/External Clock Mode
In framed mode, SW3 is used for CRC-4 MF. CRC-4 Multiframe
uses Time Slot zero to carry CRC-4 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 set for CRC-4
MF. Otherwise, the one using CRC-4 MF will detect loss of sync.
In unframed mode, SW3 is used along with SW4 to determine
the clock mode. In unframed mode, the model 2715RC can be set to
Network, internal, or external clock mode.
In framed mode SW4 is used alone to determine the 2715RC
transmitter timing. In framed mode, the Model 2715RC can be set to
Network or Internal Clock Mode.
The following charts represent both cases.
MULTIFRAME(G.704)
SW3 CRC-4 MF SW4 Clock Mode
On On Off Network
Off Off On Internal
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