Table Of Contents
Octal E1 Tributary Module, E1-8
13.1 Module Description
13.1.1 Power Consumption
13.2 External Interface
13.2.1 Connectors
13.2.2 Pinout
13.2.3 Compliance
Octal E1 Tributary Module, E1-8
13.1 Module Description
This module contains eight E1 interfaces, see Figure 13-1. The E1 traffic is mapped into VC-12 containers and multiplexed together according to chapter 2.1.1 The physical interface use a RJ-45 connector and only supports120-ohm differential interface. The module does not contain any IP functionality. The interface supports both transparent data (G.703) and the NT functionality of ISDN PRA according to ETSI 300 233.
Figure 13-1 Octal E1 Tributary Module, E1-8
13.1.1 Power Consumption
The module power consumption is 3,5 W.
13.2 External Interface
The interface is a 2Mbit/s E1 interface according to ITU-T G.703, 120ohm differential pair. The cable type must be CAT5E-STP.
13.2.1 Connectors
The connector is a RJ-45 connector, with the pin-out described in Table 13-1:
Table 13-1 E1 Interface Pinouts
Pin
|
Signal
|
1
|
P120 OUT
|
2
|
N120 OUT
|
3
|
GND
|
4
|
P120 IN
|
5
|
N120 IN
|
6
|
SHIELD
|
7
|
NC
|
8
|
NC
|
Note 
Pin 6 is always AC connected to ground. The outer screen is always direct connected to ground.
13.2.2 Pinout
Pinout-8xRJ45 2Mb is given in Table 13-2.
Table 13-2 Pinout-8xRJ45 2Mb
Signal name
|
Pin
|
I/O
|
Signal Description
|
PORT 1
|
|
|
|
RJ_TX1+
|
A1
|
O
|
Transmit+ Port1
|
RJ_TX1-
|
A2
|
O
|
Transmit- Port1
|
RJ_RX1+
|
A4
|
I
|
Receive+ Port1
|
RJ_RX1-
|
A5
|
I
|
Receive- Port1
|
PORT 2
|
|
|
|
RJ_TX2+
|
B1
|
O
|
Transmit+ Port 2
|
RJ_TX2-
|
B2
|
O
|
Transmit- Port 2
|
RJ_RX2+
|
B4
|
I
|
Receive+ Port 2
|
RJ_RX2-
|
B5
|
I
|
Receive- Port 2
|
PORT 3
|
|
|
|
RJ_TX3+
|
C1
|
O
|
Transmit+ Port 3
|
RJ_TX3-
|
C2
|
O
|
Transmit- Port3
|
RJ_RX3+
|
C4
|
I
|
Receive+ Port3
|
RJ_RX3-
|
C5
|
I
|
Receive- Port 3
|
PORT 4
|
|
|
|
RJ_TX4+
|
D1
|
O
|
Transmit+ Port 4
|
RJ_TX4-
|
D2
|
O
|
Transmit- Port 4
|
RJ_RX4+
|
D4
|
I
|
Receive+ Port4
|
RJ_RX4-
|
D5
|
I
|
Receive- Port 4
|
PORT5
|
|
|
|
RJ_TX5+
|
E1
|
O
|
Transmit+ Port 5
|
RJ_TX5-
|
E2
|
O
|
Transmit- Port5
|
RJ_RX5+
|
E4
|
I
|
Receive+ Port 5
|
RJ_RX5-
|
E5
|
I
|
Receive- Port 5
|
PORT 6
|
|
|
|
RJ_TX6+
|
F1
|
O
|
Transmit+ Port 6
|
RJ_TX6-
|
F2
|
O
|
Transmit- Port 6
|
RJ_RX6+
|
F4
|
I
|
Receive+ Port6
|
RJ_RX6-
|
F5
|
I
|
Receive- Port 6
|
PORT 7
|
|
|
|
RJ_TX7+
|
G1
|
O
|
Transmit+ Port 7
|
RJ_TX7-
|
G2
|
O
|
Transmit- Port7
|
RJ_RX7+
|
G4
|
I
|
Receive+ Port7
|
RJ_RX7-
|
G5
|
I
|
Receive- Port 7
|
PORT 8
|
|
|
|
RJ_TX8+
|
H1
|
O
|
Transmit+ Port 8
|
RJ_TX8-
|
H2
|
O
|
Transmit- Port8
|
RJ_RX8+
|
H4
|
I
|
Receive+ Port8
|
RJ_RX8-
|
H5
|
I
|
Receive- Port 8
|
13.2.3 Compliance
E1 Interface Compliance is given in Table 13-3.
Table 13-3 E1 Interface Compliance
Standard
|
Comment
|
ETS 300 246
|
Connector
|
ETS 300 247
|
Connector
|
ETS 300 011
|
Impedance towards ground
Tolerable longitudinal voltage
|
ETS 300 126
|
Output signal balance
|
ITU-T G.703
|
Cable attenuation
Input reflection loss
Input port immunity against reflection
Output pulse mask
|
ITU-T G.783
|
Output jitter in the absence of input jitter
Output combined jitter
|
ITU-T G823
|
Max. tolerable input jitter
|
