12
PA-2JT2 6.3-MHz Serial Port Adapter Installation and Configuration
OL-3587-01
VIP2 and the JT2 Port Adapter
Note
Time slots 1 to 96 are used for the data payload, while time slots 97 and 98 are used for maintenance
signaling by the DSU, the terminal equipment (TE), the network termination equipment (NT), or the line
termination equipment (LT).
The last five bits of the frame, bit 785 through bit 789, are called the F-bits. The F-bits contain the frame
and multiframe alignment signal, which consists of nine bits (110010100) carried in the first two frames
of the multiframe.
VIP2 and the JT2 Port Adapter
This section describes the JT2 port adapter and its use with the VIP2.
The following sections provide additional information specific to the JT2 port adapter and its use on the
VIP2 in Cisco 7000 series and Cisco 7500 series routers:
•
Installing or Replacing a Port Adapter on a VIP2, page 13
•
Attaching JT2 Port Adapter Interface Cables, page 14
•
Configuring the JT2 Interfaces, page 16
shows a VIP2-40 with two JT2 port adapters in port adapter slots 0 and 1. Port adapters can be installed
in either (or both) port adapter slot 0 or port adapter slot 1. You can install VIP2s in any interface
processor slots in your Cisco 7500 series or Cisco 7000 series router.
Figure 7
VIP2-40 with Two JT2 Port Adapters (Horizontal Orientation Shown)
H9370
EN
AB
LE
D
AIS RAI LOS
AIS RAI LOS
JT2
TX0
RX0
TX1
RX1
PA-2JT2 in
port adapter
slot 0
PA-2JT2 in
port adapter
slot 1
Port adapter
handles not
shown
Bus connector
DRAM
SIMMs
SRAM
DIMM U5
CPU
U6
U2
U4
Boot ROM
EN
AB
LE
D
AIS RAI LOS
AIS RAI
JT2
TX0
RX0
TX1
RX1
AIS RAI LOS
