diff --git a/dev/tests/integration/testsuite/Magento/Framework/Communication/ConfigTest.php b/dev/tests/integration/testsuite/Magento/Framework/Communication/ConfigTest.php
index fa0cd6dd1c239..d4e576d9449d7 100644
--- a/dev/tests/integration/testsuite/Magento/Framework/Communication/ConfigTest.php
+++ b/dev/tests/integration/testsuite/Magento/Framework/Communication/ConfigTest.php
@@ -22,6 +22,40 @@ public function testGetTopics()
         $this->assertEquals($expectedParsedTopics, $topics);
     }
 
+    /**
+     * Get topic configuration by its name
+     *
+     * @expectedException \LogicException
+     * @expectedExceptionMessage Service method specified in the definition of topic "customerDeletedNumbers" is not available. Given "V55\Customer\Api\CustomerRepositoryInterface::delete99"
+     */
+    public function testGetTopicsNumeric()
+    {
+        $this->getConfigInstance(__DIR__ . '/_files/valid_communication_numeric.xml')->getTopics();
+    }
+
+    /**
+     * Get topic configuration by its name
+     *
+     * @expectedException \Magento\Framework\Exception\LocalizedException
+     * @expectedExceptionMessage Invalid XML in file 0:
+    Element 'topic', attribute 'schema': [facet 'pattern'] The value '55\Customer\Api\CustomerRepositoryInterface::delete' is not accepted by the pattern '[a-zA-Z]+[a-zA-Z0-9\\]+::[a-zA-Z0-9]+'.
+    Line: 9
+
+    Element 'topic', attribute 'schema': '55\Customer\Api\CustomerRepositoryInterface::delete' is not a valid value of the atomic type 'schemaType'.
+    Line: 9
+
+    Element 'handler', attribute 'type': [facet 'pattern'] The value '55\Customer\Api\CustomerRepositoryInterface' is not accepted by the pattern '[a-zA-Z]+[a-zA-Z0-9\\]+'.
+    Line: 10
+
+    Element 'handler', attribute 'type': '55\Customer\Api\CustomerRepositoryInterface' is not a valid value of the atomic type 'serviceTypeType'.
+    Line: 10
+     *
+     */
+    public function testGetTopicsNumericInvalid()
+    {
+        $this->getConfigInstance(__DIR__ . '/_files/invalid_communication_numeric.xml')->getTopics();
+    }
+
     /**
      * Get topic configuration by its name
      */
diff --git a/dev/tests/integration/testsuite/Magento/Framework/Communication/_files/invalid_communication_numeric.xml b/dev/tests/integration/testsuite/Magento/Framework/Communication/_files/invalid_communication_numeric.xml
new file mode 100644
index 0000000000000..a18b5e6254e52
--- /dev/null
+++ b/dev/tests/integration/testsuite/Magento/Framework/Communication/_files/invalid_communication_numeric.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0"?>
+<!--
+/**
+ * Copyright © 2013-2017 Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+-->
+<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Communication/etc/communication.xsd">
+    <topic name="customerDeletedNumbers" schema="55\Customer\Api\CustomerRepositoryInterface::99delete">
+        <handler name="customHandler" type="55\Customer\Api\CustomerRepositoryInterface" method="99deleteById"/>
+    </topic>
+</config>
diff --git a/dev/tests/integration/testsuite/Magento/Framework/Communication/_files/valid_communication_numeric.xml b/dev/tests/integration/testsuite/Magento/Framework/Communication/_files/valid_communication_numeric.xml
new file mode 100644
index 0000000000000..97c92163be91f
--- /dev/null
+++ b/dev/tests/integration/testsuite/Magento/Framework/Communication/_files/valid_communication_numeric.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0"?>
+<!--
+/**
+ * Copyright © 2013-2017 Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+-->
+<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Communication/etc/communication.xsd">
+    <topic name="customerDeletedNumbers" schema="V55\Customer\Api\CustomerRepositoryInterface::delete99">
+        <handler name="customHandler" type="V55\Customer\Api\CustomerRepositoryInterface" method="deleteById99"/>
+    </topic>
+</config>
diff --git a/lib/internal/Magento/Framework/Communication/Config/ConfigParser.php b/lib/internal/Magento/Framework/Communication/Config/ConfigParser.php
index 39d1635124ea7..b8beef99ccf41 100644
--- a/lib/internal/Magento/Framework/Communication/Config/ConfigParser.php
+++ b/lib/internal/Magento/Framework/Communication/Config/ConfigParser.php
@@ -25,7 +25,7 @@ class ConfigParser
      */
     public function parseServiceMethod($serviceMethod)
     {
-        $pattern = '/^([a-zA-Z\\\\]+)::([a-zA-Z]+)$/';
+        $pattern = '/^([a-zA-Z]+[a-zA-Z0-9\\\\]+)::([a-zA-Z0-9]+)$/';
         preg_match($pattern, $serviceMethod, $matches);
         if (!isset($matches[1]) || !isset($matches[2])) {
             throw new LocalizedException(
diff --git a/lib/internal/Magento/Framework/Communication/Config/Reader/XmlReader/Converter.php b/lib/internal/Magento/Framework/Communication/Config/Reader/XmlReader/Converter.php
index 49b5e4dfd556f..4acc295ea2000 100644
--- a/lib/internal/Magento/Framework/Communication/Config/Reader/XmlReader/Converter.php
+++ b/lib/internal/Magento/Framework/Communication/Config/Reader/XmlReader/Converter.php
@@ -19,7 +19,7 @@ class Converter implements \Magento\Framework\Config\ConverterInterface
 {
     /**
      * @deprecated
-     * @see ConfigParser::SERVICE_METHOD_NAME_PATTERN
+     * @see ConfigParser::parseServiceMethod
      */
     const SERVICE_METHOD_NAME_PATTERN = '/^([a-zA-Z\\\\]+)::([a-zA-Z]+)$/';
 
diff --git a/lib/internal/Magento/Framework/Communication/etc/communication.xsd b/lib/internal/Magento/Framework/Communication/etc/communication.xsd
index b2c0777a7a02f..1b91ada103b88 100644
--- a/lib/internal/Magento/Framework/Communication/etc/communication.xsd
+++ b/lib/internal/Magento/Framework/Communication/etc/communication.xsd
@@ -54,7 +54,7 @@
             </xs:documentation>
         </xs:annotation>
         <xs:restriction base="xs:string">
-            <xs:pattern value="[a-zA-Z\\]+::[a-zA-Z]+" />
+            <xs:pattern value="[a-zA-Z]+[a-zA-Z0-9\\]+::[a-zA-Z0-9]+" />
             <xs:minLength value="5" />
         </xs:restriction>
     </xs:simpleType>
@@ -76,7 +76,7 @@
             </xs:documentation>
         </xs:annotation>
         <xs:restriction base="xs:string">
-            <xs:pattern value="[a-zA-Z]+" />
+            <xs:pattern value="[a-zA-Z0-9]+" />
             <xs:minLength value="2" />
         </xs:restriction>
     </xs:simpleType>