This document explains the differences between available IGX Frame
Relay Module (FRM) models.
There are no specific prerequisites for this document.
This document is not restricted to specific software and hardware
For more information on document conventions, see the
Cisco Technical Tips
The FRM front card supports one to four data ports and, in single-port
mode, operates at up to 2.048 Mbps.
FRM front cards exist in two forms. The easiest way to differentiate an
FRM (B) from and older FRM is to look at the actual cards. The older FRM cards
use an ACM1 adaptor. The new cards are IGX-only cards and consist of
single-card or "native" versions. Functionally, they are identical.
There are two common models of FRM - model D and model E. The
dspcds command displays an FRM with
Dxy or Exy in the
command output. This first letter (D) of that output does not tell you the
exact type of FRM, only that it is a V.35/X.25 (model D) or T1/E1 (model E)
The second letter (x) indicates the hardware revision. The latest
FRM(B) is at revision E, going on to revision H. The previous FRM model
(FRP+ACM1) is currently at revision T. If the output indicates an FRM that is
revision J or higher, it is not an FRM(B).
The third letter (y) represents the firmware revision. FRM(B) needs to
run with firmware revision V or higher. If the output indicates firmware that
is revision U or lower, it is not an FRM(B).