Carrier Grade GroomerII – Installation Guide
1.6
Ethernet connections
Please consult the GroomerII User Guide for information on configuring IP addresses.
The VoIP Traffic interfaces are designed to connect to full duplex Ethernet switch
equipment, which can sustain the required data throughput with little or no packet
loss. There are two VoIP Traffic interfaces as this can offer additional redundancy, if
required, in a correctly configured network. When both interfaces are connected and
have valid layer 1 connections, the system will default to one interface to carry VoIP
traffic rather than performing load sharing.
Design of a redundant Ethernet network is beyond the scope of this document,
however at a minimum, each VoIP Traffic interface would connect to a separate
Ethernet switch.
1.7
Cabling
GroomerII is connected to other network equipment via CAT 5, 5e, 6 or 6e cables.
There are two types of interface and they have different pin assignments.
The pin-out of the RJ45/48 connectors for both E1/T1 and Ethernet connections are
detailed below. For E1/T1 and 10/100 Ethernet connections :
Receive pairs on the system should be connected to transmit pairs on the network
equipment, and vice versa.
Cross-over cables will be required in instances where two connector sockets with the
same signal pinouts are connected together.
NOTE
E1/T1 crossover cables are wired differently to 10/100 Ethernet crossover
cables.
For Gigabit Ethernet connections, there are four pairs of signals, each transmitting
data in both directions. Cross-over cables are not normally required for Gigabit
Ethernet connections due to auto-sensing procedures built in to the interface
electronics.
NOTE
Shielded cables are recommended in all instances.
Ample strain relief should be fitted when installing all cables, both signal and power.
Any damage caused by inadequate strain relief to cards or power connectors will not
be covered by your warranty.
Both E1/T1 and Ethernet cables may be connected and disconnected while the unit is
active.
Bear in mind that disconnecting an active E1/T1 trunk will cause an alarm condition
both within the GroomerII unit and at the corresponding network end of the cable.
You may wish to check with the network operator if there is a requirement for
advance notification of E1/T1 trunk installation and maintenance.
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