IP-NET, LLC
VQE1 User Manual V1.3
-
9-
The E1-120
Ω
connection cable is made with RJ45 connectors and a length of 4-pair
twisted cable. The cable is not provided with the equipment, and the user is responsible
for making such cables in the field with length suitable for a particular installation. The
signal definition is given in Table 3.2.2-1, and pin order is depicted in Fig. 3.2.2-1. Note
that pin-1 and pin-2 should use the same twisted pair, so should pin-4 and pin-5.
8
1
Fig. 3.2.2-1 RJ45 pin order
Table 3.2.2-1 120
Ω
-E1 signal definition
Pin 1 2 3 4 5 6 7 8
- + + -
Signal
E1
－
IN
GND
E1
－
OUT
GND
The RJ45 sockets are default for E1-120
Ω
/T1-110
Ω
, t
he 4-jumpers of CNM26,
CNM25, CNM24, CNM20 in the VQE1 main board are jumpered between pins 1-2.
The cable No.
BH4.851.122
is for one RJ45 connector to two BNC (F) sockets
conversion cable for 75
Ω
E1 operations. The 4-jumpers of CNM26, CNM25, CNM24, and
CNM20 in the main board of the VQE1 board are jumpered 2-3. This cable is optional.
3.2.3
DOCSIS or Ethernet connection
Connect the Uplink 1 or 2 Ethernet port to the WAN port for connection via a DOCSIS
transport network, or to external modems such as the wireless LAN bridge or Ethernet
networks for other WAN transport solutions. Connect the local data port to computers or
to an Ethernet switch for local data applications.
The signal definition of the two local Ethernet ports is given in Table 3.2.3-1.
Table 3.2.3-1 Ethernet signal definition
Pin 1 2 3
4
5
6
7
8
Signal RxD+ RxD- TxD+
TxD-
Note: The ports confirm to HP auto-MDIX spec. It will automatically adapt
to parallel or crossed cables.
The signal definition of the uplink Ethernet ports is given in Table 3.2.3-2.
Table 3.2.3-2 Ethernet signal definition
Pin 1
2 3 4
5
6
7
8
Signal RxD+ RxD- TxD+ GND GND TxD- GND GND
