Add virtual pair of E1 interfaces

The idea is to generate a pair of virtual E1 interfaces (each with
identical number of lines), where each line A:n is connected to line B:n
of the pair and vice-versa.

This allows to test E1 using applications back to back against each
other, without any physical E1 circuits in between.

Change-Id: If42c959556b17d543762546eb45dd69d25f715f2

1 files changed, 1 insertions, 0 deletions

diff --git a/src/intf_line.c b/src/intf_line.c
index afe477d..ce30b4f 100644
--- a/src/intf_line.c
+++ b/src/intf_line.c
@@ -36,6 +36,7 @@
 
 const struct value_string e1_driver_names[] = {
 	{ E1_DRIVER_USB, "usb" },
+	{ E1_DRIVER_VPAIR, "vpair" },
 	{ 0, NULL }
 };