Carrier Grade GroomerII – Installation Guide
NOTE
When connecting the VoIP traffic port to a 10/100BaseT network, the
Ethernet cable adapter should be used. It must always be used when
connecting to a gigabit Ethernet switch.
1.7.4 1000BaseT Ethernet IP signalling connection
There will be a single IP signalling connection per system, and this connector carries
an eight wire Ethernet connection, which does not require an external splitter.
The 8-contact RJ45 Plug on the cable between the chassis and a 1000Base-T
network must be wired as follows:
Pin
Signal
Direction
1 BI_DA+
bidirect
2 BI_DA-
bidirect
3 BI_DB+
bidirect
4 BI_DC+
bidirect
5 BI_DC-
bidirect
6 BI_DB-
bidirect
7 BI_DD+
bidirect
8 BI_DD-
bidirect
Cat 5E, 6 or 6E cabling is recommended for 1000Base-T Ethernet connections, as
this will provide superior noise immunity over longer cable lengths, compared to Cat 5
cabling.
NOTE
When connecting the IP signalling port to a 10/100BaseT network, the
interface will automatically adapt to the lower data rate.
NOTE
Cross-over cables are not typically required for 100BaseT connections.
1.7.5 Cable lengths
Cat 5 cabling is designed for an overall span length of 100m. It is recommended that
the length of either a single point to point cable, or the cumulative length of multiple
cables which may be connected via a patch panel does not exceed 100m. For span
lengths approaching the 100m recommended limit it is important to specify and install
high quality cables.
For E1 trunks converted to BNC cabling, it is recommended that overall span length
is limited to 100m maximum and that 75 Ohm cabling and connectors are used.
Span lengths in excess of 100m may continue to operate. In this case the installer
should check that there is adequate margin on signal levels to maintain expected
service levels.
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