consistently use '3GPP TS' not sometimes 3GPP TS and sometimes TS.
diff --git a/doc/manuals/gb/bssgp.adoc b/doc/manuals/gb/bssgp.adoc
index bb9da43..fe30d84 100644
--- a/doc/manuals/gb/bssgp.adoc
+++ b/doc/manuals/gb/bssgp.adoc
@@ -244,14 +244,14 @@
=== Information Elements Overview
All of the IEs handled by OsmoPCU are listed below, with limitations
-and additions to TS 08.18 specified in more detail.
+and additions to 3GPP TS 08.18 specified in more detail.
-==== IEs Conforming to TS 08.18
+==== IEs Conforming to 3GPP TS 08.18
The following Information Elements are accepted by OsmoPCU. Not all
IEs are actually evaluated.
-.IEs conforming to TS 08.18
+.IEs conforming to 3GPP TS 08.18
[options="header",cols="5%,10%,40%,5%,40%"]
|===
| tag (hex) | TS 08.18 § | IE name | <-/-> | Received/Sent by OsmoPCU
@@ -301,9 +301,9 @@
| 0x3d | 11.3.47 | Service UTRAN CCO (Cell Change Order) | <- | Received
|===
-==== IEs Not Conforming to TS 08.18
+==== IEs Not Conforming to 3GPP TS 08.18
-.IEs not conforming to TS 08.18
+.IEs not conforming to 3GPP TS 08.18
[options="header",cols="5%,10%,30%,55%"]
|===
| tag (hex) | TS 08.18 § | IE name | Description
@@ -494,8 +494,8 @@
In addition to the BVCI identifying the OsmoPCU side of BSSGP
connection, there is also special BVCI which is accepted by OsmoPCU in
-accordance with TS 08.18 § 5.4.1: BVCI = 0 represents signaling data
+accordance with 3GPP TS 08.18 § 5.4.1: BVCI = 0 represents signaling data
between SGSN and PCU in contrast to PTP (Peer-To-Peer) user's data.
The mapping between BSSGP PDUs and signaling or PTP BVCIs is available
-in TS 08.18 Table 5.4.
+in 3GPP TS 08.18 Table 5.4.