Freepbx setup

in total we have 7analog line and 1Gsm module line 2 of the lines preferably will be used by ADMIN mostly if the 2lines busy can use any of the rest lines whichever available and should be able to answer all 3 Group Sales with 3 Lines Admin with 2 Lines Accounts with 1line Account will have 1extension (300) Admin will have 2extension (100,110) with a ring group 1000 Sales will have 3extension (400,410,420,430) with a ring group 2000 voice mails are active for the groups goes to mail address sales@xxxx and admin@xxxxx call out from admin department will use the 2 line only call out from sales department will be using the 5line respectively all the calls coming in to admin lines it will ring the sales group all the calls coming in to sales lines it will ring the sales group call transfer should be possible all the calls going out for 07xxxxxxxxx number will be via GSM A400P card all the calls coming in from GSM will go to Sales line extension group 2000 with different ringtone so we can understand from the GSM Call coming in (British female best quality ) thank-you-for-calling.:Thank you for calling. 3sec first-in-line.:your call is now first in line, and will be answered by the first available representative after 5sec pls-stay-on-line.:Please stay on the line and your call will be answered by the next available representative. i have seen it from this list so picked it from here http://www.voip-info.org/wiki/view/Asterisk+sound+files+additional System will ask who is calling Ask for Name and Company (keep this asking part as long as possible so user can have time to talk their name better) put on Hold music User pick up the phone System tell the caller info options 1 answer 2 send to voice mail (to caller "I am sorry all our Agents busy right now or say staff in training there is no one to answer the call etc , press 1 to leave voicemail or 2 to hangup ) 3 keep on hold music for 3min and ring the next extension available should be able to transfer calls to each other admin extension should be able to join into the call anytime using special code. should be able to pick a call from any location (if extension 400 ringing 430 should be able to pick from his location) In a case the lines are busy when 1user try to make a call it should add in a queue to dial auto as soon as the line are ready(but this can be asked "Want to add to the queue " or something ? budget 200$