Specifications

1-4
PA-T3+ Serial Port Adapter Installation and Configuration
OL-3505-03
Chapter 1 Overview
Cables and Connectors
The following conditions must be met before the PA-T3+ is enabled:
• The PA-T3+ is correctly connected and is receiving power.
• A valid software image for the port adapter has been downloaded successfully.
• The system recognizes one of the following:
– the PA-T3+
– a FlexWAN module with a PA-T3+
– a VIP with a PA-T3+
– Cisco 7304 PCI Port Adapter Carrier Card with a PA-T3+
If any of the above conditions are not met, or if the initialization fails for other reasons, the enabled LED
does not go on.
Table 1-2 lists port LED colors and indications.
Cables and Connectors
The PA-T3+ serial interface cable, which is a 75-ohm coaxial cable, is used to connect your router to a
T3+ serial network. The serial ports on the PA-T3+ are considered to be DTE devices.
The PA-T3+ has one or two T3+ serial ports, each with two connectors (receive and transmit) to which
you connect the Cisco 75-ohm coaxial cable. The 75-ohm coaxial cable (Product Number
CAB-ATM-DS3/E3=) for the T3+ serial port adapter is available only from Cisco Systems; it is not
available from outside commercial cable vendors.
The Cisco T3+ 75-ohm coaxial cable (see Figure 1-5) is available only in 10-foot (3.05-meter) lengths.
The typical maximum distance between stations for T3+ transmissions is up to 450 feet for 734A or
equivalent coaxial cable, or up to 225 feet for 728A or equivalent coaxial cable.
Figure 1-5 T3+ Serial Port Adapter Cables
Table 1-2 PA-T3+ LED
LED Label Color State Meaning
Enable Green On Port adapter is enabled for operation.
RCLK Green On A receive clock has been detected.
FERF Yellow On Framer has detected a far-end receive failure.
OOF Yellow On Framer has detected an out of frame failure.
AIS Yellow On Framer has detected an alarm indication signal.
RL Yellow On Port is in remote loopback mode.
LL Yellow On Port is in local loopback mode.
75-ohm coaxial cabling
BNC plugBNC plug
H3399