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Table 40: CTP Bundle IRIG-B Port Parameter Settings in the CTP Menu
Field
Direction
Output High Level
Output Low Volts Level
Port Speed (kbps)
Copyright © 2018, Juniper Networks, Inc.
Function
Specifies the direction of the circuit.
Although the IP circuit connection
through the network is full duplex, an
IRIG-B circuit is actually a simplex
application, and the daughter card can
operate only in Rx or Tx mode and not
both at the same time.
If the autonegotiation setting of the CTP
Ethernet media and the far-end switch
or router do not match, it is possible for
the CTP Ethernet ports to be in a
half-duplex state, although the duplex
setting is not configurable and always
assumed to be full-duplex on the CTP
device. Starting with CTPOS Release 7.2,
the half-duplex state at CTP network
interface card (NIC) ports are acquired,
regardless of the duplex setting
configured on the far-end node. After the
autonegotiation process is completed, if
the CTP NIC cannot acquire full-duplex
mode, then the interfaces are considered
to be down and a log message is
recorded in both the
/var/log/messages
directory and the
syslog file stating that the interface is
down due to a non-full duplex condition.
You are prompted to verify the cable
connection, speed, and duplex settings
because the NIC link might be down.
This setting appears only if you set the
direction of the port to Tx.
Specifies the high output level, which is
measured in peak-to-peak voltage. This
setting is based on a 50-ohm termination
This setting appears only if you set the
direction of the port to Tx.
Specifies the low output level, which is
measured in peak-to-peak voltage. This
setting is based on a 50-ohm
termination.
Specifies the data rate on the IP
connection.
Unless network bandwidth is at a
premium, we do not recommend that you
change this value from the default of 16
Kbps.
Chapter 2: Configuring CTP Bundles
Your Action
Specify yes or no to the question: Is this
an IRIG-B source end (IRIB-B signal
enters CTP)?
Yes (y)—Sets direction to Rx. This end
of the circuit recovers IRIG-B from the
attached cable and generates IP
packets toward the network
No (n)—Sets the direction to Tx. This
end of the circuit accepts IP packets,
extracts the IRIG-B data codes, and
transmits IRIG-B signaling output onto
the cable.
Enter a number from 0.00 through 7.85
volts peak-to-peak.
Enter a number from 0.00 through 7.85
volts peak-to-peak.
Enter a number from 1000 through
25,500 bps. The port speed must be a
multiple of 100 bps.
95
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