Table Of Contents
Octal E1 Tributary Model
12.1 Functional Description of Module
12.2 Power Consumption
12.3 External Interface
12.4 Connectors
12.5 Pinout
12.6 Compliance
Octal E1 Tributary Model
12.1 Functional Description of Module
The E1-8 module contains eight E1 interfaces. The E1 traffic is mapped into VC-12 containers and multiplexed.
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.
12.2 Power Consumption
The power consumption of the E1-8 is 3,5 W.
12.3 External Interface
The interface is a 2 Mbps E1 interface according to ITU-T G.703, 120 ohm differential pair.
The cable type must be CAT5E-STP.
12.4 Connectors
The connector is a RJ-45 connector, Table 12-1 lists the E1 interface pinouts.
Table 12-1 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
|
Figure 12-1 Octal E1 Tributary Module, E1-8
Note 
Pin 6 is always AC connected to ground. The outer screen is always direct connected to ground.
12.5 Pinout
Table 12-2 Pinout-8xRJ45 2Mb
Signal name
|
Pin
|
I/O
|
Signal Description
|
PORT1
|
|
|
|
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
|
12.6 Compliance
Table 12-3 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
|
