Cisco PA-2CT1 Installation And Configuration Manual page 7

•
Handle carriers by available handles or edges only; avoid touching the printed circuit boards or
connectors.
•
Place a removed component board-side-up on an antistatic surface or in a static shielding
container. If you plan to return the component to the factory, immediately place it in a static
shielding container.
•
Avoid contact between the printed circuit boards and clothing. The wrist strap only protects
components from ESD voltages on the body; ESD voltages on clothing can still cause damage.
•
Never attempt to remove the printed circuit board from the metal carrier.
Caution
measurement should be between 1 and 10 megohms (Mohm).
What Is the 2CT1 Port Adapter?
The following sections discuss information specific to the 2CT1 port adapter locations, LEDs, and
cables:
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Port Adapter Locations on the VIP2 and in Cisco 7200 Series Routers, page 8
•
2CT1 Port Adapter LEDs, page 10
•
2CT1 Port Adapter Cables and Pinouts, page 11
The 2CT1 port adapter, shown in Figure 1, provides up to two channelized T1 ISDN PRI interfaces
for connecting Cisco 7000 series routers to channel service units (CSUs). Each 2CT1 interface can
transmit and receive data bidirectionally at the T1 rate of 1.544 megabits-per-second (Mbps).
Both 2CT1 interfaces connect to external networks through a single port that has a 15-pin, D-shell
receptacle. Two standard serial cables, null-modem and straight-through, for use with the 2CT1 port
adapter are available from Cisco Systems and other vendors.
Note
To replace port adapters, you must first remove the VIP2 from the chassis, then replace port adapters
as required.
Cisco 7200 series routers support the OIR of all port adapter types.
Figure 1
When running channelized T1, each 2CT1 interface can provide up to 24 T1 channel groups, which
are numbered from 0 to 23. Each channel group provides up to 24, 64 kilobit-per-second (kbps)
timeslots (DS0 channels), which are numbered 1 to 24. Multiple DS0 channels can be mapped to a
single channel group. Each channel group is presented to the system as a serial interface that can be
configured individually. Usable bandwidth for each channel group is calculated as n x 64 kbps,
where n is a number of DS0 channels (1 to 24).
For safety, periodically check the resistance value of the antistatic strap. The
While the VIP2 supports online insertion and removal (OIR), individual port adapters do not.
2CT1 Port Adapter (Faceplate View)
Channelized T1 Port Adapter Installation and Configuration
What Is the 2CT1 Port Adapter?
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