Ok, I set it up like this:
<extension name="CompanyIn">
   <condition field="destination_number" expression="^(8203)$" continue="true"/>
     <!-- man strftime - M-F, 9AM to 5PM -->
      <condition field="${strftime(%w)}" expression="^([1-2])$"/>
         <anti-action application="voicemail" data="default 10.11.12.25 10199"/>
      <condition field="${strftime(%H%M)}" expression="^((09|1[0-6])[0-5][0-9]|1700)$">
         <action application="set" data="call_timeout=45"/>
         <action application="set" data="domain_name=10.11.12.25"/>
         <action application="set" data="continue_on_fail=true"/>
         <action application="set" data="hangup_after_bridge=true"/>
         <action application="bridge" data="group/company@${domain_name}"/>
         <action application="answer" data=""/>
         <action application="sleep" data="1000"/>
         <action application="voicemail" data="default 10.11.12.25 10199"/>
         <anti-action application="voicemail" data="default 10.11.12.25 10199"/>
      </condition>
</extension>

But now it gives me:

2010-01-22 11:52:08.667564 [NOTICE] switch_channel.c:602 New Channel sofia/external/2680xxxx@87.54.25.116 [16baec2f-4407-df11-8fb3-000c29b7b4cb]
2010-01-22 11:52:08.800123 [INFO] mod_dialplan_xml.c:252 Processing 2680xxxx->4692xxxx in context public
2010-01-22 11:52:08.830071 [NOTICE] switch_ivr.c:1349 Transfer sofia/external/2680xxxx@87.54.25.116 to XML[8203@default]
2010-01-22 11:52:08.830071 [INFO] mod_dialplan_xml.c:252 Processing 2680xxxx->8203 in context default
2010-01-22 11:52:08.830071 [NOTICE] switch_ivr.c:1349 Transfer sofia/external/2680xxxx@87.54.25.116 to enum[8203@default]
2010-01-22 11:52:09.163439 [INFO] switch_core_state_machine.c:136 No Route, Aborting

huh