-are supported. Some common rate values are \fB0\fR equals a modem,
-\fB13\fR equals 9600, and \fB26\fR equals 56KB. See the header file
-\fBmp_port.h\fR for other values.
-.IP \fIencode\fR 12
-Specifies the physical data encoding. A \fB0\fR indicates NRZ, and a \fB1\fR
-indicates NRZI.
-.IP \fItrace\fR 12
-Specifies the data link receive trace mode. This argument must be \fB0\fR.
-.RE
-.if n .bp
-.SH EXAMPLE
-The following entry configures five MPCC boards: one for X.25,
-ASYNC, 32PORT, BISYNC and SNA. Each has two ports.
-.nf
-
+are supported. Some common rate values are
+.Sy 0
+equals a modem,
+.Sy 13
+equals 9600, and
+.Sy 26
+equals
+.Pf \&56 Tn KB .
+See the header file
+.Pa mp_port.h
+for other values.
+.It Em encode
+Specifies the physical data encoding. A
+.Sy 0
+indicates
+.Tn NRZ ,
+and a
+.Sy 1
+indicates
+.Tn NRZI.
+.It Em trace
+Specifies the data link receive trace mode. This argument must be
+.Sy 0 .
+.El
+.Ed
+.Sh EXAMPLES
+The following entry configures five
+.Tn MPCC
+boards: one for X.25,
+.Tn ASYNC ,
+.Pf 32 Tn PORT ,
+.Tn BISYNC
+and
+.Tn SNA .
+Each has two ports.
+.Bd -literal