Copyright 2017 Positron, Inc.
4
1.3
General Technical Notes
1.3.1
POE
Can be powered locally (local power provided by the backplane of the TeleLite shelf)
Can be powered by -48Vdc in the appropriate polarity from the Ethernet Network Edge
Device via the first (top) Ethernet port as per POE specifications (in the appropriate
polarity). Its interface supports the two standard modes of powering using
superimposed 48 Vdc on the data pair or using the spare pin on the RJ45 in any
polarity
Has DIP switches to set:
Master/Slave
Types 1 or 2
MDIX enabling or disabling (Disabled is default). Check modems if they are
MDIX enabled. If they are not, this feature should be enabled to avoid cross-
over issues.
PSE enabling or disabling (Used only on 720920xxx. On 720930xxx, this switch
(#4) is always to be set to “Disabled”)
1.3.2
PSE
Can only be powered locally (local power provided by the backplane of the TeleLite
shelf)
Has DIP switches to set:
Master/Slave
Types 1 or 2
MDIX enabling or disabling (
“Disabled” is default). Check modems if they are
MDIX enabled. If they are not, this feature should be enabled to avoid cross-
over issues.
PSE enabling or disabling depending on if the terminating modem is locally
powered or not. If modem is not locally powered, set this DIP switch (#4) to the
“Enabled”
1.3.3
Ethernet Modem Interface Card Features:
Support of single- and multi-mode ST/SC connector type.
POE CFJ card can be either remote or locally powered through a jumper setting.
The modem/switch ports are auto-sensing with the hardware automatically detecting
and setting the speed for any 10 Base-T/100 Base-TX device connected to the
interface.
Auto-negotiation for half/full duplex operation on every port automatically.
Auto Uplink takes care of the MDI/MDI-X connection and eliminates the need for toggle
switches or special crossover cables on all 10/100 ports. This results in automatic
polarity correction that helps find and fix common cabling problems.
Flow control ensures reliable communications during full-duplex operation.
Unmanaged switch function provides plug-and-play simplicity.
Comprehensive LED display with per-port indicators allows status monitoring and
activity of every port at a glance.
Switch design delivers dedicated bandwidth to each port.
100mbps of Ethernet through-put is shared equally among the RJ-48 receptacles used
