CTC Union ETU01C User manual

User Manual
ETU01C
Dual Port E1 Access Multiplexer with Sub E1
CTC Union Technologies Co., Ltd.

CTC Union Technologies Co., Ltd.
Far Eastern Vienna Technology Center (Neihu Technology Park)
8F, No. 60 Zhouzi St.
Neihu, Taipei 114
Taiwan
Tel: [phone]
Fax: [phone]
Email: [e-mail]
URL: http://www.ctcu.com
ETU01C User manual
version 1.0 Sept. 2005
User Manual for Dual Port E1 Access Multiplexer with Sub E1
Thank you for choosing our product.
Please read this manual carefully before using the ETU01C.
This manual supports the following models:
ETU01C 100-240 VAC model
ETU01C –48V DC model
Copyright © 2005, CTC Union Technologies, Inc.
All rights reserved.
All specifications are subject to change without prior notice.

Table of Contents
Chapter 1. Introduction
1.1 Introduction...............................................................................................7
1.2 Functional Description ..............................................................................7
1.3 Typical System Applications......................................................................8
1.4 E1 signal structure.....................................................................................8
1.5 ETU01C Capabilities...............................................................................10
1.6 TECHNICAL SPECIFICATIONS..........................................................12
Chapter 2. Installation
2.1 General.....................................................................................................15
2.2 Site Preparation.......................................................................................15
2.3 Mechanical Assembly..............................................................................15
2.4 Electrical Installation...............................................................................15
Chapter 3. Front Panel Operation
3.1 GENERAL...............................................................................................19
3.2 CONTROLS AND INDICATORS..........................................................19
3.3 Menu Operation.......................................................................................20
Chapter 4. Control Port Operation
4.1 General.....................................................................................................30
4.2 Terminal Connection...............................................................................30
4.3 Menu System Detail.................................................................................31
Chapter 5. Diagnostic Tests
5.1 Test Loops................................................................................................51
Appendix A........................................................................................................59
Technical Inquiry Form

Table of Contents

Chapter 1 Introduction
7
1.1 Introduction
The ETU01C provides an economic multiplexing solution for Fractional E1
network services. Two DTE devices may be linked to the ETU01C at combined data
rates of 64kbps to 2048kbps.The ETU01C also provides one E1 sub-link which may
be connected over a public E1 network. The E1 sub-link will perform Drop&Insert
with user-defined timeslot connections from a PABX or other E1 equipment to E1
network services.
The ETU01C supports local control and diagnostics via the front panel LCD and
a serial RS-232 craft port. This feature enables users to easily configure the unit,
execute the in-service diagnostics and monitor the network status.
1.2 Functional Description
The ETU01C data channels support user-selectable transmission rates, which are
integer multiples of 64kbps, up to a maximum 2.048Mbps on twisted pair or coax
cable. The ETU01C has two jumper selectable interfaces; RS-530 or V.35. Adapter
cables are required to connect client equipment for V.35, X.21 or RS-449.
The ETU01C fully meets all of the E1 specifications including ITU G.703, G.704,
G.706, G.732, and G.823.
Multiple clock source selection provides maximum flexibility in connecting both
the E1 and user interfaces. The ETU01C has the flexibility to meet the timing
requirements of various system configurations. The timing modes for the E1 link
and for the user channel are selected by the setting of configuration data via the front
panel LCD display, or terminal mode console port. The E1 link may be clocked
from the E1 recovered receive clock (main E1 link or sub E1 link), from the user
data ports, or from the internal oscillator.
The ETU01C provide IDLE CODE mode, you can set any time slot and insert the
idle code with ‘00'-‘FF', and the default code is ‘7F'.
The ETU01C includes a BERT generator and receiver which may internally
connect to either main or sub E1 or to either data channel.
The ETU01C is available in either AC or DC models. Voltage models include AC
(100-240VAC) or DC (18-72VDC). An internal relay ensures that the main to sub
E1 is connected even if the system is powered off.

Chapter 1 Introduction
8
1.3 Typical System Applications
General
E1 Network
ETU01C
Router
V.35/RS530
Router
V.35/RS530
PABX
Channel 1
Channel 1
Hyper Terminal
Router
V.35 * 2
LAN
ETU01C
PABX
Sub E1
Ethernet
E1 Network
ETU01C
PABX
Router
V.35 * 2
Ethernet
LAN Sub E1
E1
Figure 1-1: Example; Typical Application
In a typical application (Figure 1-1), the ETU01C is used to connect the
synchronous data channels of two routers and the local and remote LANs over an E1
line. The fractional E1 data service is based on the assumption that the combined
user data rate of all channel modules plus Sub-Link is equal to or is a fraction of the
full available E1 bandwidth, in multiples of 64K. Up to two data channels may be
connected plus an optional E1 sub-link.
1.4 E1 signal structure
The E1 line operates at a nominal rate of 2.048Mbps. The data transferred over
the E1 line is organized into frames, with each E1 frame containing 256 bits. The
256 bits are organized as 32 time slots of eight bits each and carry the data payload.

Chapter 1 Introduction
9
E1 transmissions utilize two main types of framing: Frame Alignment Signal
(FAS) and Multi-Frame Alignment Signal (MFAS). Framing is necessary in order
for equipment receiving the E1 signal to be able to identify and extract the
individual channels. PCM-30 (CAS) transmission systems use MFAS framing along
with FAS framing. PCM-31 (CCS) transmission systems use only FAS framing.
Frame Alignment Signal (FAS) The 2.048 Mbps frame consists of 32 individual
time slots (numbered 0-31). As described previously, each time slot consists of an
individual 64 Kbps channel of data. In the FAS format, time slot 0 of every other
frame is reserved for the frame alignment signal pattern. Alternate frames contain
the FAS Distant Alarm indication bit and others bits reserved for national and
international use.
Multi-Frame Alignment Signal (MFAS) MFAS framing uses Channel Associated
Signaling (CAS) to transmit the A/B/C/D bits signaling information for each of 30
channels. This method uses the 32 time slot frame for mat with time slot 0 dedicated
for the Frame Alignment Signal (FAS) and time slot 16 dedicated. For the Multi-
Frame Alignment Signal (MFAS) and the Channel Associated Signaling (CAS).
E1 line signal
The basic E1 line signal is coded using the Alternate Mark Inversion (AMI) or
HDB3 rule.
In the AMI format, "ones" are alternately transmitted as positive and negative
pulse, whereas "zeros" are transmitted as a zero voltage level. AMI is not used in
most 2.048 Mbps transmissions because synchronization loss occurs during long
strings of data zeros.
In the HDB3 format, a string of four consecutive zeros is replaced with a
substitute string of pulses containing an intentional bipolar violation. The HDB3
code substitutions provide high pulse density so that the receiving equipment is able
to maintain synchronization with the received signal.

Chapter 1 Introduction
10
1.5 ETU01C Capabilities
E1 link line coding
The ETU01C supports two E1 line codes:
AMI coding.
HDB3 coding.
E1 framing formats
The ETU01C supports three formats:
Unframed format. (in Unframed, only Data port 1 is supported)
FAS (CCS, PCM-31) format. (TS0 reserved)
MFAS (CAS, PCM-30) format. (TS0 and TS16 reserved)
User data channel rates
The ETU01C supports each user data channel rates which are a multiple of
64kbps. For maximum flexibility, the ETU01C supports combined data rates up to
2.048Mbps.The ETU01C supports flexible time slot assignment, allowing the user
to freely specify the selection of time slots, in sequence or randomly, for each data
channel.
User data channel interface
The ETU01C has two user data channel interfaces (CHANNEL 1 and CHANNEL
2) and two types of user data channel interfaces: V.35 or RS-530 (X.21, RS-449).
The desired interface is achieved by jumper settings in the ETU01C. The ETU01C
supports any two interface settings for the two user data channel interfaces.
System Timing Considerations
The ETU01C has the flexibility to meet the timing requirements of various
system configurations. The timing mode for the E1 link and for the user channel are
selected by the setting of configuration data via the front panel LCD display.
E1 link timing
The ETU01C E1 link receive path always operates on the receive clock. The
ETU01C recovers the receive clock from the received E1 link data signal. The
source of the ETU01C E1 link transmit clock can be selected by the user.

Chapter 1 Introduction
11
The following E1 link transmit timing modes are available.
Loop back timing
The ETU01C E1 link transmit clock is locked to the recovered receive
clock (Main link E1 or Sub link E1). This is usually the timing mode selected for
network operation.
Internal timing
The ETU01C E1 link transmit clock is derived from the internal clock
oscillator. This timing mode is necessary in point-to-point applications over leased
line. In this case, one ETU01C must use the internal oscillator, and the others must
operate from the recovered clock.
External timing
The ETU01C E1 link transmit clock is locked to the clock signal
provided by the user DCE connected to one of the user's data channels. When the
data channel is used as the clock source, the data channel must use clock timing
mode 2 (DTE).
User data channel timing
The ETU01C has two user data channel clocking modes:
Clock mode 1 (DCE)
The ETU01C data channel operates as a DCE providing the transmit and
receive clocks (recovered timing) to the data terminal equipment connected to the
user channel. The clocks are locked to the master timing.
Clock mode 2 (DTE)
The ETU01C data channel operates as a DTE (crossover cable required)
and accepts both transmit clock and receive clock (both from the ETC pin) from the
user DCE equipment.

Chapter 1 Introduction
12
1.6 TECHNICAL SPECIFICATIONS
Main E1 and sub E1 links
Framing
-Unframed/Framed (sub link framed only)
-FAS (PCM31)
-FAS+CAS (PCM30)
-CRC4 ON/OFF
Bit Rate 2.048 Mbps
Line Code -AMI
-HDB3
Line Impedance -Unbalanced 75 ohms
-Balanced 120 ohms
Relative Receive Level 0 to -43dB
"Pulse" Amplitude -Nominal 2.37V+/-10% for 75 ohms
-Nominal 3.00V+/-10% for 120 ohms
"Zero" Amplitude 0.1V
Tx Frequency Tracking
Internal Timing
Loop back Timing
External Timing
+/-30 ppm
+/-50 ppm
+/-100 ppm
Jitter Performance According to ITU-T G.823
Complies With ITU-T G.703, G.704, G.706 and G.732
Interface Connectors -RJ45
-BNC
User Data Channels
Interface Types -RS-530
-V.35
Interface Connectors RS-530/V.35 25 pin, D-type Female
Data Rate

N*64kbps
Where N equal 1 to 31 in CCS
And N equal 1 to 30 in CAS
Clock Modes -Clock Mode 1 (DCE): Receive and transmit
clock (recovered) to the Synchronous DTE
-Clock Mode 2 (DTE): Receive and transmit
clock from the synchronous DCE (all from
ETC pin).
Control Signals -CTS constantly ON or follows RTS
-DSR constantly ON, except during test loops
-DCD constantly ON, except during signal loss
Time slot allocation User defined, randomly assignable

Chapter 1 Introduction
13
Setup/Configuration
LCD 2 rows of 16 characters
Pushbutton Switches -ESC
-Left Arrow
-Right Arrow
-Enter
LED indicators
Figure1-2 ETU01C Front Panel
1. Power
Dual Color LED
GREEN: Power
RED: Test
2. Error (Only active in BERT mode)
RED: Pattern Error
3. Main E1 (include Signal loss, SYNC Loss)
Dual Color LED
GREEN: SYNC OK
RED : Signal Loss
RED flashing: SYNC Loss
LIGHT OFF: Main E1 chip failure
4. Alarm of Main E1
RED OFF: NO E1 Alarm
RED ON: E1 Alarm ( AIS, RAI, MRAI )
5. Sub E1 (include Signal Loss, SYNC Loss)
Dual Color LED
GREEN : SYNC OK
RED : Signal Loss
RED flashing : SYNC Loss
LIGHT OFF : Sub E1 chip failure
6. Alarm of Sub E1
RED OFF: NO E1 Alarm
RED : E1 Alarm ( AIS, RAI, MRAI )

Chapter 1 Introduction
14
7. CH1-TD of Datacomm
ON :DATA 1 FROM DTE
OFF : DATA 0 FROM DTE
flashing : DATA 0 and 1 FROM DTE
8. CH1-RD of Datacomm
ON : DATA 1 FROM Main E1
OFF : DATA 0 FROM Main E1
flashing : DATA 0 and 1 FROM Main E1
9. CH2-TD of Datacomm
ON :DATA 1 FROM DTE
OFF : DATA 0 FROM DTE
flashing : DATA 0 and 1 FROM DTE
10. CH2-RD of Datacomm
ON : DATA 1 FROM Main E1
OFF : DATA 0 FROM Main E1
flashing : DATA 0 and 1 FROM Main E1
RS-232 CONSOLE port
Port interface V.24/RS-232 asynchronous, DCE
Port connector 9 pin D-type female
Data rate 19200 bps
Data format -1 start bit -8 data bits -No parity -1 stop bits
Alarm relay -Floating pair of NO and NC contacts
-Contact ratings: 1A at 30 VDC resistive or 0.5A at 125 VAC resistive
Physical
Height: 44 mm
Width: 195 mm
Depth: 245 mm
Weight: 925g net
Power supply
Voltage (AC model) 100 ~ 240 VAC
Voltage (DC model) 18 ~ 72 VDC
Frequency 47 to 63 Hz for AC power
Power consumption 15 VA
Environment
Temperature 0-50C / 32-122F
Humidity 0 to 90% non-condensing

Chapter 2 Installation
15
2.1 General
This chapter provides detailed instructions for mechanical installation of the
ETU01C. Following the completion of installation, please refer to Chapter 3 for
front panel operating information and Chapter 4 for console port operating
information.
2.2 Site Preparation
Install the ETU01C within reach of an easily accessible grounded AC outlet. The
outlet should be capable of furnishing 100 to 240 VAC. Allow at least 10cm (4 inch)
clearance at the rear of the ETU01C for signal lines and interface cables.
2.3 Mechanical Assembly
The ETU01C is designed for tabletop, shelf or rack mount installation, and except
for rack mount installation, is delivered completely assembled. Rack mounted
applications require installation of additional rack mounting brackets. No provisions
are made for bolting the ETU01C to the tabletop.
2.4 Electrical Installation
2-4-1. Power connection
AC power is supplied to the ETU01C through a "Mickey Mouse" type plug. The
ETU01C should always be grounded through the protective earth lead of the power
cable.
2-4-2. Rear panel connectors
The data channel interfaces are fixed on the rear panel of the ETU01C (Refer to
Figure 2-1) and consist of DB25pin connectors for RS-530 and V.35. Two RJ-45
interfaces and two pairs of BNC Coax connectors for the main E1 and E1 sub-link.
The last connector is a DB9pin connector for the terminal mode console port.
Figure 2-1 ETU01C rear panel (AC model)

Chapter 2 Installation
16
E1 Line side
BNC coax connector
Two BNC coax pair of connectors marked RX and TX, provide unbalanced
75 Ohm connections for the Main E1 and Sub E1 lines.
RJ-45 INTERFACE
Two RJ-45 connectors marked Sub E1 and Main E1, provide balanced 120
Ohm connections for the Main E1 and Sub E1 lines.
The pin assignments for RJ-45 connectors are as follows:
1 RTIP (Receive data in)
2 RRING (Receive data in)
4 TTIP (Transmit data out)
5 TRING (Transmit data out)
Note: This follows the USOC RJ-48C standard.
Data Port Settings
Data Port 1 setting
J200 J201 J202 J700
V35 1-2 1-2 1-2 2-3
RS530 2-3 2-3 2-3 1-2
Data Port 2 setting
J300 J301 J302 J701
V35 1-2 1-2 1-2 1-2
RS530 2-3 2-3 2-3 2-3

Chapter 2 Installation
17
J301
J302
J300
J303
J203
J201
J202
J200
J701 J700
123
123
123
Figure 2-2 Data port jumper settings

Chapter 2 Installation
18
This page left blank intentionally.

Chapter 3 Front Panel Operation
19
3.1 GENERAL
This chapter describes the ETU01C controls and indicators, and explains
operation setup procedures using the front panel LCD and menu keys. Installation
procedures (in Chapter 2) must be completed and checked before attempting to
operate the ETU01C.
3.2 CONTROLS AND INDICATORS
All controls (push-button switches), LCD display and LED indicators are located
on the ETU01C front panel. The momentary on pushbutton switches are used to
activate menu selections and select parameter settings.
Figure 3-1: ETU01C Front Panel
Use the ‘LEFT' and ‘RIGHT' function keys to browse the menus and select
parameters.
Use the ‘ESC' function key to return to a previous menu or to abandon setup.
Use the ‘Enter' function key to set a parameter of a selection or to enter a sub-menu.

Chapter 3 Front Panel Operation
20
3.3 Menu Operation
3.3.1 Top Level Menus
The following are the 8 top level Menus. Press an arrow key (LEFT or RIGHT) to
select another top level Menu or press ENTER to reach a sub menu.
When powered on, the ETU01C will work under the last saved setting. Press
ESC to stop the running, and the LCD will display:
Set the default system parameter, save the present parameter, reset the system,
and choose the system clock.
Set the Line code, interface and distance, transmit buffer, receive buffer,
Frame type, and idle code for main E1 link.
Set the Line code, interface and distance, transmit buffer, receive buffer,
Frame type, and idle code for sub E1 link.
RUN
ON
>>>>>>>>>>>>>>>>
<
SYSTEM
>
PARAMETER
<
MAIN
E1
LINK
>
PARAMETER
<
SUB
E1
LINK
>
PARAMETER
<
TIME
SLOT
>
MAPPING
For normal transmissions, the
unit must be in 'RUN' mode.