diff --git a/common/chapters/port_numbers.adoc b/common/chapters/port_numbers.adoc
index fdb8ef9..48ba7a2 100644
--- a/common/chapters/port_numbers.adoc
+++ b/common/chapters/port_numbers.adoc
@@ -48,6 +48,8 @@ which protocol / interface.
 |TCP|4268|telnet (VTY)|osmo-uecups
 |SCTP|4268|UECUPS|osmo-uecups
 |TCP|4269|telnet (VTY)|osmo-e1d
+|TCP|4271|telnet (VTY)|osmo-smlc
+|TCP|4272|Control Interface|osmo-smlc
 |UDP|4729|GSMTAP|Almost every osmocom project
 |TCP|5000|A/IP|osmo-bsc, osmo-bsc_nat
 |UDP|23000|GPRS-NS over IP default port|osmo-pcu, osmo-sgsn, osmo-gbproxy