Models 707B and 708B Switching Matrix Reference Manual
Section 2: General operation
707B-901-01 Rev. A / August 2010
2-87
Switch operation
Working with channels
Overview
This section gives an overview of working with channels, including a discussion of channel types,
selecting channels, opening and closing channels, setting common channel attributes, and setting up
channel patterns.
NOTE
To install the switching card, refer to instructions in the Models 707B and 708B Quick Start Guide.
The Models 707B and 708B have specific settings that apply to opening and closing channels.
CAUTION
Hot switching can dry weld reed relays such that they will always be on. Hot switching is
recommended only when external protection is provided.
Channel identification
The channels on the cards that you can use with the Model 707B or 708B are referred to by a
channel specifier. The specifier is used to identify channels for use with close and open operations,
scans, and channel patterns, using the front panel, web, or remote command interface.
A channel specifier is a four or five-digit alphanumeric sequence. The first digit is always the slot
number of the card in the mainframe. The remaining digits vary depending on the type of card.
Channel types
The Models 707B and 708B support matrix cards. The documentation for your specific card model
lists the available channels.
Specify multiple channels using lists. Lists build on the individual channel specifier.
