Class Field

The Class field contains the speed of the device, if the keyword ACU or Direct is used in the Type field. However, it can contain a letter and a speed (for example, C1200, D1200) to differentiate between classes of dialers (Centrex or Dimension PBX).

This is necessary because many larger offices can have more than one type of telephone network: one network might be dedicated to serving only internal office communications while another handles the external communications. In such a case, it becomes necessary to distinguish which line(s) should be used for internal communications and which should be used for external communications.

The keyword used in the Class field of the Devices file is matched against the Speed field of Systems file as shown in Example 12-6. Note that the titles of each column apply only to fields in the Devices file.

Example 12-6 Class Field and /etc/uucp/Systems Correspondence

File Name  Type   Line  Line2  Class  Dialer-Token-Pairs
 
Devices    ACU    cua/a -      D2400  hayes
 
System     gobi   Any   ACUEC  D2400  3251 ogin: nuucp ssword: taheya
 

Some devices can be used at any speed, so the keyword Any can be used in the Class field. If Any is used, the line matches any speed requested in the Speed field of the Systems file. If this field is Any and the Systems file Speed field is Any, the speed defaults to 2400 bps.