Carrier grade groomerII – installation guide
1.7.6 RJ45 Connector orientation
RJ45 (US RJ48) Plug
Front View
8 7 6 5 4 3 2 1
Figure 1-5 RJ45 pin numbering
1.8
Ethernet equipment legacy compatibility
The system IP signalling Ethernet interface is designed to operate at Gigabit Ethernet
data rates. If connected to network equipment that is not Gigabit capable, the
interface will attempt to negotiate the highest data rate available.
The GroomerII VoIP traffic interfaces are designed to operate at Fast Ethernet
(100Base-T) data rates. If connected to network equipment that is not Fast Ethernet
capable, the interface will attempt to negotiate a 10Base-T link speed. In most cases
this will impose an artificially low channel count on VoIP connections that will limit the
Groomer system capacity.
CAUTION
The VoIP Traffic interfaces should not be connected directly to legacy “hub” (half
duplex) network equipment.
Modern Ethernet switching equipment operates in a full duplex data mode. It is not
recommended to route VoIP traffic via a network path containing a half duplex ‘hub’
as this will reduce system performance.
1.9
System initialisation
The system start-up process will run automatically at power on, and will start the
Groomer application.
1.10
Cabling checks when system is operational
You can check the continuity of the cabling by looking at the connection state of each
interface via the GroomerII Status Monitor. The Status Monitor will start automatically
when the system is initialised. Full details of Status Monitor views are included in the
GroomerII User Guide.
An E1/T1 trunk with No Signal detected (NOS) means either open circuit on the
receive path or the paths are crossed i.e. RX connected to RX and TX to TX.
An E1/T1 trunk with
Remote Alarm Indication Detected (RAI) normally means the
receive path is good but the transmit path may be open circuit.
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