A hardware predictive dialer provide robust features by using hardwares. Hard dialer uses dedicated telephony switches to find out answering machines and carry out call progress analysis. A hard dialer use switches which usually have two main types of connections:
• Agent audio; in this connection hard dialer places a call to the agent’s desk, as soon as the agent logs in for his session. This connection is then kept open for the duration of the session. The agent audio connections are usually simple T1/E1/ISDN etc. telephony spans which are connected directly to an existing PBX.
• External audio; this type of connection is used to make outbound phone calls. The outbound call is immediately joined to an already open agent audio connection of the agent selected to take the call, as soon as it is made and answered. These connections are typically ISDN/T1/E1 connections direct to the PSTN.
The advantages of Hard Dialers are many when compared with soft dailers:
• Fewer telephony connections required; in hard dialers external audio connections can go directly to the PSTN.
• Hard Dialers do not need upgrading and are less affected by software changes, since standard telephony connections are the only link between the PBX and the dialer.
• Superior answering machine and call progress detection capacity.
• Remote agent capabilities; Hard Dialers are suitable for home working or remote sites, since they are able to connect to any phone, anywhere on the PSTN.
• Faster call switching; in Hard Dialers both ends of the call are already in place.
• Higher capacity for handling calls.
• Independent of special CTI communication and proprietary PBX protocols
• Independent of PBX; Hard dialers are able to work with a PBX or without benefit of any PBX or ACD).
A Hard Dialer has the following disadvantages:
• It is more expensive than a soft dialer when the enterprise already has a PBX with spare capacity for processing calls.
• It is more expensive to upgrade and maintain.
HARDWARE REQUIREMENT FOR HARDWARE PREDICTIVE DIALER:
1. Intel Xeon E 5607 (Quad Core) Processor,
2. 2.26 GHz, 8 MB Cache,
3. 1066 MHz, 1x4GB Memory,
4. 1x300GB SAS 10k RPM, 2.5″ Hot Swap SAS,
5. DVD ROM, Integrated RAID 01 (M1015 RAID).
6. IP PHONES with Headset,
7. PRI with E1 cards,
8. Database server should be separate.
Definition of E1/T1/J1 :
E1 a physical layer protocol, like ethernet. It defines a 2mbps. It is most popular in Europe.
T1 this is similar to E1. It is used in North America and defines a 1.544 mbps.
A J1 card is the Japanse version of a T1.
ISDN : full form of ISDN is Integrated Service Digital Network. It is a digital communication which we implement over PSTN, which carry voice and data simultaneously. ISDN interface are BRI (Basic Rate Interface) / PRI (Primary Rate Interface). BRI are made up of a number of B channels and D channels. B Channel or the Bearer Channel is used for data transmission, including voice, and D channel is meant for signalling and control. A PRI is made up of 23 B-channels and one 64 Kbps D-channel in a T-1 configuration and 30 B-channels and 1 D-channel using an E1 line. Both B and D channels is 64 kbps.
PSTN : Public switched telephone network is the full form of PSTN. It is the traditional way to communicating over the telephone line. PSTN is a circuit switched communication technology.
VoIP – is a method through which phone calls transfer using the internet. P stands for protocol is the standard for how to communicate.I is for Internet and with the P is the standard for how to communicate over the internet, Internet Protocol. V is for voice and we have Voice over Internet Protocol, written as VoIP.
Protocol – set of rules with which we can communicate with different machine. Computers follow different protocols when communicating. For example the protocol to communicate over the Internet is called Internet Protocol, or IP. There are many other protocols like tcp and udp
TCP – stands for Transmission Control protocol. It is one of the major types of protocols used to ensure whether there are any traffic is lost..
UDP -stands for User Datagram Protocol (Datagram means a small part of a communication.) It is one of the major types of protocols mainly used on things like voice traffic where minor losses are not audible.
Difference between TCP and UDP :
TCP:
- 1. Reliable Protocol.
- 2. Requires a acknowledgement.
UDP:
- 1. Unreliable Protocol.
- 2. Requires no acknowledgement.
PBX – it is a phone system which supports multiple extensions that can talk directly with each other as well as making and receiving phone calls. The term PBX stands for Private (as in not owned by the phone company) Branch (branching off phone network) eXchange (since it can exchange calls to and from the public network)
RAID – stands for Redundant Array of Inexpensive Drives. An array of RAID drives off redundency where a drive can fail without the loss of any information. There are several levels of RAID, each offering its advantages and disadvantages. There are 3 types of RAID.
- RAID 0= STRIPE VOLUME WITHOUT PARITY
- RAID1= MIRORITY /MIRROR VOLUME
- RAID5= STRIPE VOLUME WITH PARITY
RAID0= Parity is a mathematical calculation which is used to rebuilt the data from fail disk.
RAID1= It provide fall tollerence. If one drive fall then data automatically work on second drive without any data loss.
RAID5= here we get a option called Parity. .
SAS – is the name of a type of connection used for hard drives. It stands for Serial attached SCSI (Small Computer Simple Interface) and this class of drives are built to run at full load 80% of the time, compared to the normal types which are build to run at full load 20% of the time. Thus the reliability on SAS drives is much higher.
