Minggu, 28 Maret 2010

pcm 30

pcm 30 sendiri terdapat 30 kanal bicara pada satu jalur highway

setiap time slot nya sendiri kecepatannya 64 Kbps

SIGTRAN dan ss7

Sigtran merupakan satu bagian kecil dari suatu prosees evolusi jaringan all ip. Sigtran sendiri adalah standard yang di definisikan oleh IETF(Internet engeneering task force).Dalam standarisasi SIGTRAN terdapat seperangkat protokol
yang memodelkan arsitektur transport pensinyalan SS7 (signaling sistem no 7).

kelebihan ss7 beberapa keuntungan dari keuntungan pecarian :
  • pertama pembawa tidak harus menjaga database sepenuhnya tiap adanya switching node, tetapi dapat melakukan database jarak jauh dan mencari informasi secepatnya.
  • kedua SS7 merupakan penggabungan berbagai macam sistem program kendali penyimpanan ke jaringan. Ini dapat mempercepat dan mengefisienkan pengaturan panggilan ke jaringan dalam 1 detik.
  • ketiga Integrasi para penyedia untuk supervisi, pemantauan, penggabungan sistem billing menjadi lebih baik.
kekurangan ss7 adalah jika pelanggan yang menggunakan teknologi ini banyak, maka akan mempengaruhi operasi dari jaringan tradisional (over load) oleh karena itu ditawarkan sebuah solusi berupa teknologi IP Tranfer Point (ITP), yang merupakan sebuah perangkat (hardware dan software) yang mampu menyalurkan trafik Signalling System 7 di atas IP.

Layer - layer pada ss7

pada ss7 di dapat 2 jenis layer yaitu pertama camel, CAP dan INAP.

Camel merupakan cara untuk menambahkan aplikasi ke ponsel cerdas (bukan fixed) jaringan.
CAP(Camel Aplication Part) didasarkan pada subset dari ETSI Core dan memungkinkian untuk implementasi carrier-grade, layanan nilai tambah seperti unified messaging, prabayar, penipuan Freephone DNS dan GSM baik dalam suara dan jaringan data GPRS.
INAP adalah sebuah protocol pensinyalan yang digunakan dalam arsitektur jaringan cerdas yang biasa berlapis lapis diatas Tcap.

SIGTRAN sendiri memodelkan transport pensinyalan ss7.

Rabu, 24 Februari 2010

Zig Bee

ZigBee is a wireless technology developed as an open global standard to address the unique needs of low-cost, low-power, wireless sensor networks. ZigBee is the equivalent of words and Zig Bee. Zig means zig-zag movement and Bee is a bee. Zigbee possess communication similar to the communication between the bees that perform movements erratic in conveying the information of honey to the bee that one to bee the other

The ZigBee Protocol

he ZigBee protocol was engineered by the zig bee aliance , a non-profit consortium of leading semiconductor manufacturers, technology providers, OEMs and end-users worldwide. The protocol was designed to provide OEMs and integrators with an easy-to-use wireless data solution characterized by low-power consumption, support for multiple network structures and secure connections

The ZigBee Advantage

The ZigBee protocol was designed to carry data through the hostile RF environments that routinely exist in commercial and industrial applications.

feature of zigBee
  • Low duty cycle - Provides long battery life
  • Support for multiple network topologies: Static, dynamic, star and mesh
  • Up to 65,000 nodes on a network
  • Low latency
  • Support for guaranteed time slots and packet freshness
  • Retries and acknowledgements
  • Clear channel assessment
  • Link quality indication
  • Collision avoidance
  • Direct Sequence Spread Spectrum (DSSS)
  • 28-bit AES encryption – Provides secure connections between devices

ieee 802,11 n

IEEE 802.11n-2009 is a wireless networking standard changes
IEEE 802,11-2.007 to increase throughput over previous standards,
such as 802.11b and 802.11g, with a maximum data rate improvement in layer
OSI Physical (PHY) of 54 Mbit / s to a maximum of 600 Mbit / s by using
four rooms in the wide flow channel 40 MHz(
40 MHz channel is another feature incorporated into 802.11n is
doubling the width of the channel from 20 MHz in earlier to 802.11 PHY
send data
).

Profit
1. Capable of transferring data such as the 'wireless highway' that save time
and more quickly.
2. Features minimize the amount of data needed to transfer files to give
more space in the path of the file transfer.
3. Provide a longer time for the battery because the chip 802.11n
uses less power.

4. There is a combination of two wireless frequencies for better performance.
5. Wi-Fi 802.11n can reach speeds of 600Mbps.

token ring and fddi


Token Ring uses a ring topology whereby the data is sent from one machine to the next and so on around the ring until it ends up back where it started. It also uses a token passing protocol which means that a machine can only use the network when it has control of the Token, this ensures that there are no collisions because only one machine can use the network at any given time.
The Fiber Distributed Data Interface (FDDI) specifies a 100-Mbps token-passing, dual-ring LAN using fiber-optic cable. FDDI is frequently used as high-speed backbone technology because of its support for high bandwidth and greater distances than copper
The FDDI protocol is based on the TokenRing protocol. So the diferrent FDDI and Token Ring is about the route. If one is lost then the network token ring network can not connect but FDDI can connect bacause have two route


Handout MicroProsesor

Silahkan download handout microprosesor dan antar muka disini.

Senin, 22 Februari 2010

Setting IP version 6

Configure IPv6 using the IPv6 Configuration wizard

To configure IPv6 on the server, you must change the server's configuration using the IPv6 Configuration wizard in iSeries™ Navigator. IPv6 may only be configured from iSeries Navigator, and may not be configured from the character-based interface.

Note: You may configure the IPv6 ethernet line description by using the Create Line Desc (Ethernet) CRTLINETH command in the character-based interface; however, you must specify the hexadecimal multicast group address 333300000001. Then, you must use the IPv6 Configuration wizard to finish configuring IPv6.

The wizard will require the following input:

  • For configuring an Ethernet line for IPv6:
    This configuration allows you to send IPv6 packets over an IPv6 local area network (LAN). The wizard requires the name of the hardware communications resource on the server on which you will configure IPv6; for example, CMN01. This must be either a 2838 or 2849 Ethernet adapter that is not currently configured for IPv4. See create ipv6 LAN for a scenario that shows a situation in which you would configure an Ethernet line for IPv6.
  • For creating a configured tunnel line (TNLCFG64):
    • This type of configuration allows you to send IPv6 packets over IPv4 networks. The wizard requires the IPv4 address for the local endpoint and the IPv6 address for the local interface associated with the tunnel. See send ipv6 packets over ipv4 LAN and send ipv6 packets over ipv4 WAN for scenarios that show two situations in which you would create the configured tunnel lines for IPv6.

To use the IPv6 Configuration wizard, follow these steps:

  1. In iSeries Navigator, expand your server ––> Network ––> TCP/IP Configuration.
  2. Right-click IPv6 and select IPv6 Configuration.
  3. Follow the wizard's instructions to configure IPv6 on your server.
 

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