diff --git a/src/elwig-rest-backend b/src/elwig-rest-backend
index daccea5..155fbba 100755
--- a/src/elwig-rest-backend
+++ b/src/elwig-rest-backend
@@ -20,7 +20,7 @@ import hashlib
 import hmac
 
 
-VERSION: str = '0.0.7'
+VERSION: str = '0.0.8'
 
 CNX: sqlite3.Cursor
 USER_FILE: str
@@ -150,7 +150,7 @@ def get_delivery_schedule_filter_clauses(filters: list[Filter]) -> list[str]:
 
 
 class ElwigApi(BaseHTTPRequestHandler):
-    def send(self, data: str, status_code: int = 200, url: str = None) -> None:
+    def send(self, data: str, status_code: int = 200, url: str = None, content_type: str = 'application/json') -> None:
         raw = data.encode('utf-8')
         self.send_response(status_code)
         self.send_header('Access-Control-Allow-Origin', '*')
@@ -168,7 +168,7 @@ class ElwigApi(BaseHTTPRequestHandler):
             if 'gzip' in accept_encoding:
                 raw = gzip.compress(raw)
                 self.send_header('Content-Encoding', 'gzip')
-        self.send_header('Content-Type', 'application/json; charset=UTF-8')
+        self.send_header('Content-Type', content_type + '; charset=UTF-8')
         self.send_header('Content-Length', str(len(raw)))
         self.end_headers()
         if self.request.type != 'HEAD' and self.request.type != 'OPTIONS':
@@ -368,6 +368,29 @@ class ElwigApi(BaseHTTPRequestHandler):
                       f'"announcement_to":{jdmp(r[9])}}}',
             filters, offset, limit, distinct=(['s.year', 's.dsnr'], [1, 2]))
 
+    def do_GET_contacts(self):
+        data = '<?xml version="1.0" encoding="UTF-8"?>\n'
+        data += '<AddressBook>\n'
+        rows = CNX.execute("""
+            SELECT m.mgnr, m.name AS name_1,
+                   COALESCE(m.given_name, '') AS name_2,
+                   p.comment, REPLACE(p.number, '+43 ', '0') AS number
+            FROM member m
+                JOIN member_telephone_number p ON p.mgnr = m.mgnr
+            ORDER BY m.name, m.given_name, m.mgnr, p.nr
+            """)
+        for r in rows:
+            # max field len = 18
+            extra = f' - {r[3]}' if r[3] else ''
+            mgnr = f' ({r[0]})'
+            last_name = r[1].upper()  # MUSTERMANN
+            first_name = (r[2] if len(r[2]) + len(mgnr) <= 18 else r[2][:18 - len(mgnr) - 1] + '.') + mgnr  # Max (123) - Erika
+            if 18 - len(first_name) > 4:
+                first_name += extra
+            data += f'  <Contact><LastName>{last_name}</LastName><FirstName>{first_name}</FirstName><Phone type="Work"><phonenumber>{r[4]}</phonenumber><accountindex>0</accountindex></Phone></Contact>\n'
+        data += '</AddressBook>\n'
+        self.send(data, content_type='application/xml')
+
     def do_HEAD(self) -> None:
         self.do_GET()
 
@@ -386,6 +409,10 @@ class ElwigApi(BaseHTTPRequestHandler):
 
             username, role, auth_method = self.authorize()
 
+            if self.path == '/contacts/grandstream/phonebook.xml':
+                self.do_GET_contacts()
+                return
+
             parts = self.path.split('?', 1)
             if len(parts) == 1:
                 path, query = parts[0], {}