Raisecom Technology Co., Ltd
10
When FPT is disabled, it is identical to the AIS function of traditional optical multiplexers. When the
receiving signals of the E1 interface at the remote site are lost, the corresponding local E1 interface will
output all “1” signals; when the receiving signals of the local optical interface are lost, all local E1
interfaces will output all “1” signals.
FPT is designed for users who have special requirements. When FPT is enabled, if there is alarm of
LOS on any direction of optical interface，E1 interfaces on both sides will not output HDB3 code. In this
case, there will be LOS alarm, rather than AIS alarm, on downstream E1 terminal devices (e.g. Switches,
converters or SDH devices).
5
th
bit FPT
OFF Disable (complies with AIS)
ON Enable
z 6
th
bit: setting for oversize packet
6
th
bit Definition
ON 1916 byte
OFF 1536 byte (default)
The 8-bit DIP-Switch on right side:
z The 1
st
– 4
th
bits are used for duplex setting when auto-negotiation fails
Note: supports 10/100Mbps auto-sensing and full/half duplex auto-negotiation at Ethernet
port
Auto-negotiation fails: forced duplex mode according to the table shown as following
Auto-negotiation success: working on full duplex
Definition
1
st
2
nd
3
rd
4
th
OFF Full duplex
(default)
OFF Full duplex
(default)
OFF Full duplex
(default)
OFF Full duplex
(default)
ON Half duplex ON Half duplex ON Half duplex ON Half duplex
z 5
th
and 6
th
bits: Ethernet port isolation function setup
5
th
6
th
Definition
OFF OFF Port 1~4 can interconnect with each other, default setting
OFF ON Port 1~4 isolated at local site
ON OFF Port 1~4 isolated oppositely both on two sides (with TAG)
ON ON Port 1~4 isolated oppositely both on two sides (without
TAG)
“Interconnect” means all users of local site can switch data with each other and with users
of remote site.
“Isolated on local site” means users of local site isolate each other; but can switch data with
remote site.
“Isolated oppositely on two sides” means 1
st
port local site can switch data with 1
st
port of
remote site. So do others. The “TAG” shall be added as per the customer’s requirement.
(16 pages)
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