Monday, 22 February 2010

Speed Dialing SIP URI's with CallCentric

With CallCentric VoIP service, you can dial SIP URI's (Uniform Resource Identifier) for free.  But, dialing SIP URI's from a regular telephone connected to an ATA is typically not possible using the telephone's keypad or speed-dial contact list.  Most desktop and cordless phones don't allow entering alpha characters for phone numbers, which URI dialing requires.

In this post, I have listed a few ways to simplify making SIP URI calls from CallCentric accounts.

There are three primary methods that I use to speed dial my favorite SIP URI numbers through CallCentric:
  1. Web-based phone book using Click2Dial (Call-Back) from the user's Dashboard
  2. CallCentric Phone Book SpeedDial: *75xx from your SIP ATA connected phone, IP-Phone, or softphone
  3. Using Linksys Cisco SPA2102 or PAP2T ATA Speed Dial feature
Methods 1 and 2 above require that the user pre-populate their CallCentric web-based phone book contact list, which is hosted in the user's CallCentric Dashboard.  Phonebook entries can be of the format 1777xxxxxxx for free in-network calling to other CallCentric users, 1-xxx-xxx-xxxx format for calling PSTN and mobile phones, or URI format for SIP URI numbers.

Once the CallCentric web-based Phone Book has has been populated with your SIP speed-dail numbers, there are two primary ways to initiate speed-dialing.
  1. Click on the contacts "hyperlink".  This will initiate a Click2Dial web-initiated "call-back" to your registered SIP device and then connect your SIP device to the destination number.
    (This method requires you to be logged into your CallCentric account control panel dashboard)
  2. Dial *75xx (*7501 - *7599) from your SIP device using the *75xx number assigned to your desired contact in the CallCentric phone book.  This method will work from your ATA, softphone, and even when making CallCentric Calling Card calls from any of their global Calling Card Gateway numbers.  It's a definite time saver and often the only way to initiate SIP URI calls.

    When calling through your ATA (I'm using Cisco SPA2102-NA), be sure the ATA Dial Plan for your CallCentric account includes the following entry:  |*75xx|  to properly handle the *75xx speed-dialing.
If your ATA has Speed Dial features built-in like the Cisco Linksys SPA2102-NA and PAP2T-NA phone adapters do (which I use) then speed dialing only requires pushing two digits instead of the 5 digits as used with the *75xx method above in step 2.

Speed dialing from the SPA2102 is initiated by pressing "x#", where x represents the speed-dial index number of the numbers pre-programmed into the ATA (programmed by you the user).  The SPA2102 can hold up to 8 speed-dial numbers and are referenced from 2 - 9.  Thus, you can speed-dial numbers from 2# to 9#.

So now, if you programmed SIP URI's into your ATA, you can speed-dial a lengthy alpha-numeric SIP URI just by pressing two digits on your ATA connected phone (2x, 3x, 4x, etc.).

In my previous post:  Speed Dialing on the SPA2102, I explained how to program speed-dial numbers into the SPA2102-NA for PSTN or mobile numeric numbers.  However, in order to enable SIP URI dialing on the SPA2102-NA, you need to go to Line-1 and/or Line-2 pages of the ATA and Enable IP Dialing for each line to use.  It's located at the very bottom of Line-1 and Line-2 pages, just below the Dial Plan section.

Here are a few SIP URI's I have used for testing:
  •  (iNum Echo Test)
  •  (VUC-VoIP Users Conference - Listen to live conference - Fridays 12 PM EST
  •  (VUC - VoIP Users Conference via iNum)
  •    (Echo Test)
  •  (TellMe Information)
  •  (Time Announcement EST)
  •  (music)