Hi Nasry,
You would probably want to set up a Hunt Group using the "Broadcast Algorithm" that will forward calls to the 5 Members at the same time. The receptionist will forward to the Hunt Pilot DN which will then search for the 5 Line Group Members 001 ,015,020,032,044 simultaneously;
Broadcast-If you choose this distribution algorithm, Cisco Unified CallManager distributes a call to all idle or available members of a line group simultaneously.
There are a few steps detailed below that are needed to configure a CCM Hunt Group. Here is the related info (the docs are for CCM 5.x but do carry over for 6.x as well :)
Line Groups
Line groups contain one or more directory numbers. A distribution algorithm, such as Top Down, Circular, Longest Idle Time, or Broadcast, associates with a line group. Line groups also have an associated Ring No Answer reversion timeout value.
The following descriptions apply to the members of a line group:
•An idle member designates one that is not serving any call.
•An available member designates one that is serving an active call but can accept a new call(s).
•A busy member cannot accept any calls.
For information on configuring line groups,
http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/5_0_4/ccmcfg/b03lngrp.html#wpxref97498
Hunt Lists
Hunt lists comprise ordered groupings of line groups. A line group may belong to more than one hunt list. Hunt pilots associate with hunt lists. A hunt list may associate with more than one hunt pilot.
For information on configuring hunt lists,
http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/5_0_4/ccmcfg/b03htlst.html#wpxref31940
Hunt Pilots
Hunt pilots are sets of digits. They comprise lists of route patterns that are used for hunting. A hunt pilot can specify a partition, numbering plan, route filter, and hunt forward settings. A hunt pilot must specify a hunt list.
For information on configuring hunt pilots,
http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/5_0_4/ccmcfg/b03htpil.html#wpxref28844
Hope this helps!
Rob
