Disadvantages of IP Telephony

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IP phone or IP telephony involves the utilization of an existing, integrated Net network to interact between 2 or additional business or personal segments. The technology has replaced the previously explored PSTN or public switched phonephone network system. Calls created via IP telephony will traverse the established Net network. IP phone technology empowers decision-making via proprietary protocols such as Session Initiation Protocol and Shopper Control Protocol. The system could be fitted with software-based mostly Soft-phones or special built-in hardware-empowered devices. With the facility of integrated analog telephony adapters, even simple telephones can be reused as IP phones. The essential parts of an analog IP phone include:

* A system that integrates the DNS, STUN and DHCP clients.
* Signaling and RTP Stack.
* Audio and video codecs.
* Special user interface.
* Dedicated hardware fitted with a microphone, earphones, keypad, display interface, voice engine, ADC and DAC converters, Ethernet and a battery or some DC source.

IP Telephony conjointly works along systems fitted within WiFi enabled mobile phones, PDAs and analog telephony adapters. Hardware empowered devices enable customers to use business VoIP or voice over Internet protocol suppliers over existing PSTN telephony. Today, the technology additionally accommodates designs that have designed-in GSM base stations to achieve access to remote areas where low-powered gateway transmitting otherwise becomes impossible. IP telephony flaunts fashionable features like access to:

* Caller ID.
* ID Calling.
* Automatic use of network-based mostly directories.
* Conference calls.
* Decision transfer and hold.
* Storing user name/number in systems facilitated by different service providers.
* Weather report analysis.
* Live news.

Disadvantages of IP Telephony:

The IP telephony or decision access via VoIP is not without its own set of disadvantages. These embrace:

* Restricted or no use in the absence of a dedicated net access. The system will not accommodate calls beyond the Local area network or LAN, unless there is an integrated, compatible PBX system in place.
* Total dependency on separate electric connectivity. Unlike the PSTN phones, IP Phones and routers connect only via mains electricity. The system is not empowered to figure via power generated from phonephone exchanges.
* Simple congestion. These networks, particularly residential internet connectivity, simply succumb to congestion. The result’s poor voice quality or a complete decision-drop, within the midst of an emergency.
* Lapse in connectivity when exposed to high-latency connectivity. The technology will not empower internet-decision connectivity when exposed to latency induced by protocol overhead. The system conjointly fails to function effectively when exposed to satellite web integration.
* Failure when integrated alongside other digital equipment. The IP telephony technology becomes redundant when different digital systems are integrated into the adopted phone line. Equipment like digital video recorders and home security systems don’t integrate with VoIP.
* Difficult emergency calls. The technology becomes a challenge to surpass an emergency. VoIP uses special IP-addressed phone numbers and not regular public-service NANP phone numbers. Hence, it becomes difficult for a 911 operator to identify the precise geographic location of the given IP address.
* Distorted facilitation when challenged by latency and packet-loss. The Internet association used by the IP telephony technology makes the integrated system vulnerable to broadband latency, jitter and packet-loss. The result’s distorted and garbled communication thanks to transmission error.
* Exposure to Denial of Service attacks (DoS attack). IP telephony, like alternative web integrated networks, is subjected to Denial of Service break-downs if the address used is an public IP id.

IP telephony is susceptible to attacks from viruses and hacking. The system uses a technology that’s utterly keen about the ability of integrated PCs. The resultant processor drain leads to frequent communication-quality loss and system-crash.

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