diff --git a/PDP11/pdp11_dc.c b/PDP11/pdp11_dc.c
index 313f50be..f25127b0 100644
--- a/PDP11/pdp11_dc.c
+++ b/PDP11/pdp11_dc.c
@@ -45,7 +45,6 @@
 #else                                                   /* PDP-11 version */
 #include "pdp11_defs.h"
 #endif
-#include "sim_sock.h"
 #include "sim_tmxr.h"
 
 #define DCX_MAXMUX      (dcx_desc.lines - 1)
@@ -528,6 +527,10 @@ t_stat dcx_reset (DEVICE *dptr)
 {
 int32 ln;
 
+for (ln = 0; ln < dcx_desc.lines; ln++) {
+    tmxr_set_line_output_unit (&dcx_desc, ln, &dco_unit[ln]);
+    tmxr_set_line_speed (&dcx_desc.ldsc[ln], "9600");
+    }
 dcx_enbdis (dptr->flags & DEV_DIS);                     /* sync enables */
 sim_cancel (&dci_unit);                                 /* assume stop */
 if (dci_unit.flags & UNIT_ATT)                          /* if attached, */
@@ -556,7 +559,6 @@ return;
 t_stat dcx_attach (UNIT *uptr, CONST char *cptr)
 {
 t_stat r;
-
 r = tmxr_attach (&dcx_desc, uptr, cptr);                /* attach */
 if (r != SCPE_OK)                                       /* error? */
     return r;
diff --git a/PDP11/pdp11_dl.c b/PDP11/pdp11_dl.c
index a4771964..9f6ec9df 100644
--- a/PDP11/pdp11_dl.c
+++ b/PDP11/pdp11_dl.c
@@ -728,6 +728,8 @@ if (sim_switches & SWMASK ('P')) {
         dl[ln].lp = &tmxr->ldsc[ln];
         dl[ln].pi_ireq = (idptr == &dli_dev) ? dli_ireq : dlcji_ireq;
         dl[ln].po_ireq = (idptr == &dli_dev) ? &dlo_ireq : &dlcjo_ireq;
+        tmxr_set_line_output_unit (tmxr, ln, &odptr->units[ln]);
+        tmxr_set_line_speed (&tmxr->ldsc[ln], "9600");
         }
     }
 dlx_enbdis (dptr);                                      /* sync enables */
diff --git a/sim_tmxr.c b/sim_tmxr.c
index 4f4851a6..796a7a9a 100644
--- a/sim_tmxr.c
+++ b/sim_tmxr.c
@@ -4532,6 +4532,8 @@ for (j = 1; j < mp->lines; j++)
         break;
 if (j == mp->lines)
     fprintf(st, ", Output Unit: %s", sim_uname (o_uptr));
+else
+    o_uptr = NULL;
 for (j = 1; j < mp->lines; j++)
     if (uptr != mp->ldsc[j].uptr)
         break;