diff --git a/share/man/man4/cdce.4 b/share/man/man4/cdce.4
index 4b5b4787e584..6384eecc97ad 100644
--- a/share/man/man4/cdce.4
+++ b/share/man/man4/cdce.4
@@ -33,7 +33,7 @@
 .Os
 .Sh NAME
 .Nm cdce
-.Nd "USB Communication Device Class Ethernet driver"
+.Nd "USB Communication Device Class Ethernet (CDC ECM/NCM) driver"
 .Sh SYNOPSIS
 To compile this driver into the kernel,
 place the following lines in your
@@ -58,7 +58,9 @@ The
 .Nm
 driver provides support for USB Host-to-Host (aka USB-to-USB) and
 USB-to-Ethernet bridges based on the USB Communication Device Class
-(CDC) and Ethernet subclass.
+Ethernet Control Model (CDC ECM) and Network Control Model (CDC NCM)
+specifications.
+It also provides device-level CDC ECM support.
 .Pp
 The USB bridge appears as a regular network interface on both sides,
 transporting Ethernet frames.
diff --git a/share/man/man4/umodem.4 b/share/man/man4/umodem.4
index 89dc0a3fba5b..81213dfb14d0 100644
--- a/share/man/man4/umodem.4
+++ b/share/man/man4/umodem.4
@@ -34,7 +34,7 @@
 .Os
 .Sh NAME
 .Nm umodem
-.Nd USB modem support
+.Nd USB Communication Device Class serial (CDC ACM) driver
 .Sh SYNOPSIS
 To compile this driver into the kernel,
 place the following lines in your
@@ -54,9 +54,10 @@ umodem_load="YES"
 .Sh DESCRIPTION
 The
 .Nm
-driver provides support for USB modems in the Communication
-Device Class using the Abstract Control Model.
-These modems are basically standard serial line modems, but they are
+driver provides support for USB modems and serial devices that
+implement the Communication Device Class Abstract Control Model (CDC ACM).
+It also implement device-side CDC ACM support.
+Supported modems are basically standard serial line modems, but they are
 accessed via USB instead.
 They support a regular AT command set.
 The commands can either be multiplexed with the data stream