Asterisk setup success 4

Hardware Configurations

Machine name pbx:

  • Dell PowerEdge 300SC
    • Dual 1Ghz slot-1 PIIIs
    • 1GB memory
    • 2 160gig IDE HD (SATA) connected to 3ware RAID card, doing RAID-1 (mirroring)
    • Digium T100P

Other hardware

  • Sipura 2000 POTS gateway (connected to our Polycom conference room phone and cordless 900Mhz analog phone)
  • D-link D104S MGCP POTS gateway (not used but configured)
  • WiFi (802.11) SIP Phone
  • Rocksteady NSA solution ( for VoIP prioritization/queuing

Description of deployment.

  • PRI from SBC (Southwestern Bell) into our facility (migrated entire company from Lucent/Avaya Partner PBX which we outgrew)
  • PRI has 16B channels and 1D channel (room for growth to 23B)
  • 100 DID numbers from SBC
  • 35 Cisco 79XX phones (mixture of 7960s and 7940s) with latest 6.1 SIP firmware (connected to two Cisco Catalyst 3524PWR for in-line power)
  • 3 Cisco 7940 phones with latest 6.1 SIP firmware at remote locations over nailed up IPSEC VPN tunnels
  • 2 Remote Sipura 2000 POTS gateways connected over nailed up IPSEC VPN to users
  • 5 Grandstream Budgetone 100 phones
  • 5 Cisco 7905G phones, remote via VPN tunnels for Support personnel
  • Phones are on a separate Layer 3 VLAN internally for voice traffic, and tagged with a TOS bit of 5 for prioritization
  • NuFone for connectivity and dialing and additional 866 number (dial 8 to get NuFone, 9 to get SBC)
  • System configuration /etc/asterisk and /var/spool/asterisk (voicemail, etc) gets backed up to tape library daily.

Special features in Extensions ruleset with Asterisk

  • All phones have DID extensions
  • All Cisco phones have additional Intercom (autoanswer extension)
  • ACD used for incoming calls to our main number, queue is only called during "working hours" otherwise defaults to IVR
  • Several DIDs and extensions ring multiple extensions including home office connections over VPN (some ring up to 4 phones at one time)
  • ACD queue used for Support personnel, "static" agents always ring certain SIP extensions, but other agents can login/logout remotely to be added to the virtual/extended support personnel.
  • IVR menu for main number
  • Call Forward on no answer
  • Call Forward unconditionally
  • Speed Dials
  • Remote Call Forwarding
  • Ability to record calls
  • Conference Bridge (room)
  • MP3 Music on Hold
  • Voicemail (of course) w/e-mail and paging notification
  • Directory
  • 877 number for toll-free access
  • CallerID lookup in external Database for Name (if not supplied)

Overall experience

We've had wonderful feedback on everything from system installation and operation. Migration was smooth and SBC worked well with us to port our existing numbers to DIDs. I had extensive experience with Asterisk for almost 1 year prior to doing this for the company. System is monitored via Nagios.

Initially wanted to use RxFax for incoming faxes, but incompatibility with many fax machines forced me to use Hylafax ( and keep an SBC analog line for the purpose.

Lenny Tropiano

Created by: InetNomad, Last modification: Mon 25 of Jun, 2007 (23:20 UTC) by pgaz
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