Usb Ports - Cisco 1240 Hardware Installation Manual

Chapter 2 Router Hardware Description
D E C . 2 0 1 1 — E F T R E V I E W D R A F T — C I S C O C O N F I D E N T I A L
Figure 2-20
The router features a single IRIG-B timing port (see
codes to an optional connected device. IRIG-B output provides standard time codes to so timing devices
can correlate time information with network devices. The router integrated GPS provides the time
information that is provided by this interface.
Note The IRIG-B timing port supports timing output only.
Table 2-11
Format
B000
B120
Specifications
Specification
Connector type
Supported Code Formats

USB Ports

Note Currently not supported. This hardware feature will be supported in a future software release.
OL-12345-01
Router IRIG-B Timing Port
Supported IRIG Serial Time Code Formats
Modulations
DC Level Shift (DCLS)
pulse-width coded
Amplitude Modulation
(AM)
Description
SMB coaxial RF
IRIG-B000 and B123
Figure 2-20), which provides serial formatted time
Carrier Frequency Code Expression
None BCD time of year,
CF and SBS
1kHz sine wave BCD time of year,
CF and SBS
Cisco 1240 Connected Grid Router Hardware Installation Guide
Hardware Features Detailed Description
Interface
RS232/RS485
50 ohms BNC
2-27