manual: link to new common cs7-config.adoc, remove some dup of that

Related: OS#2767
Depends: Ia2508d4c7b0fef9cdc57e7e122799a480e340bf7 (osmo-gsm-manuals)
Change-Id: Ie88dd2c7f7318a31ae04fbd6930346d92141fde5
diff --git a/doc/manuals/chapters/running.adoc b/doc/manuals/chapters/running.adoc
index e8320a7..688fbbe 100644
--- a/doc/manuals/chapters/running.adoc
+++ b/doc/manuals/chapters/running.adoc
@@ -107,20 +107,21 @@
 
 ==== Configure SCCP/M3UA to accept _A_ and _IuCS_ links
 
-OsmoMSC will contact an STP instance to establish an SCCP/M3UA link. BSC and
-HNBGW will then reach the MSC via this link. By default, an STP instance is
-assumed to listen on the default M3UA port (2905) on the local host.
+OsmoMSC acts as client to contact an STP instance and establish an SCCP/M3UA
+link.
 
-Establishing an SCCP/M3UA link towards an STP instance not on the local host
-can be configured as follows:
+An example configuration of OsmoMSC's SCCP link:
 
 ----
 cs7 instance 0
- asp my-OsmoMSC 2905 0 m3ua
-  ! IP address of the remote STP:
-  remote-ip 10.23.24.1
+ point-code 0.23.1
+ asp asp-clnt-OsmoMSC-A-Iu 2905 0 m3ua
+  remote-ip 127.0.0.1
+  sctp-role client
 ----
 
+This configuration is explained in detail in <<cs7_config>>.
+
 Note that _A_ and _IuCS_ may use different SCCP instances, if so desired:
 
 ----
@@ -135,21 +136,6 @@
  cs7-instance-iu 1
 ----
 
-A full configuration needs an `asp` on an `as` -- an Application Server Process
-running on an Application Server -- as well as a local point code and routing
-configuration. The SCCP VTY automatically creates those parts that are missing,
-by assuming sane defaults. A complete configuration would look like this:
-
-----
-cs7 instance 0
- point-code 0.23.1
- asp my-OsmoMSC-A-Iu 2905 0 m3ua
-  remote-ip 127.0.0.1
- as my-as-for-OsmoMSC-A-Iu m3ua
-  asp my-OsmoMSC-A-Iu
-  routing-key 0 0.23.1
-----
-
 ==== Configure GSUP to reach the HLR
 
 OsmoMSC will assume a GSUP server (OsmoHLR) to run on the local host and the