diff --git a/docs/expert/infrastructure/index.md b/docs/expert/infrastructure/index.md
index 614d4fc9cfdd4277c9508232255fafc5ddeb9609..a85983cd2b225efc904fb8504ed82a4bad70b78d 100644
--- a/docs/expert/infrastructure/index.md
+++ b/docs/expert/infrastructure/index.md
@@ -89,3 +89,17 @@ When registering a new AMC card at P5, a Jira ticket should be
 opened with the sysadmins to tell them the "birdname", but the
 geographic slot-based identifiers should already be registered if the
 shelf was previously registered.
+
+## FED mapping
+
+The FED number (or ID) is an important configuration parameter required for proper analysis of the data taken.
+The mapping between the FED ID and its usage is described in the table below:
+
+| FED ID    | Usage              |
+|-----------|--------------------|
+| 1467      | GE-1/1             |
+| 1468      | GE+1/1             |
+| 1469      | GE2/1 demonstrator |
+| 1470-1472 | GE2/1              |
+| 1473-1476 | ME0                |
+| 1477-1478 | Test setups        |
diff --git a/docs/expert/infrastructure/p5.md b/docs/expert/infrastructure/p5.md
index 52f3f9375402308253c4529f3a3f566a22e64211..cac134d058eef9ed24302578ead410e0df2007be 100644
--- a/docs/expert/infrastructure/p5.md
+++ b/docs/expert/infrastructure/p5.md
@@ -70,10 +70,10 @@ The notification polices can be changed by opening a [Jira ticket](https://its.c
 
 #### S2E01
 
-| Device            | Notes                                                |
-|-------------------|------------------------------------------------------|
-| `mch-s2e01-04-01` | GE2/1 demonstrator µTCA crate (GEMPILOT --  FED1469) |
-| `psu-s2e01-05-01` | GE2/1 Aspiro PSU                                     |
-| `mch-s2e01-14-01` | GE+1/1 µTCA crate (GEM+ -- FED1468)                  |
-| `mch-s2e01-23-01` | GE-1/1 µTCA crate (GEM- -- FED1467)                  |
-| `psu-s2e01-24-01` | GE1/1 Aspiro PSU                                     |
+| Device            | Notes                                              |
+|-------------------|----------------------------------------------------|
+| `psu-s2e01-24-01` | GE1/1 Aspiro PSU                                   |
+| `mch-s2e01-23-01` | GE-1/1 µTCA crate - FED1467 (GEM-)                 |
+| `mch-s2e01-14-01` | GE+1/1 µTCA crate - FED1468 (GEM+)                 |
+| `psu-s2e01-05-01` | GE2/1 Aspiro PSU                                   |
+| `mch-s2e01-04-01` | GE2/1 demonstrator µTCA crate - FED1469 (GEMPILOT) |