อุปกรณ์ที่ใช้รับส่งข้อมูลมีอะไรบ้าง

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1. ��â��

��â��Ũе�ͧ��෤��㹡��Ѻ�觢��ͤ��¡ѹ��ö��áѹ�� ෤��շ��㹡��â��͡�� 2 ��˭�� ෤��ա��â��ŷҧ��෤��ա��â��

1.1 ෤��ա��â��ŷҧ��

��â��ŷҧ��繡�õԴ��ü�ҹ��µ�ҧ� �� Ѿ�� ෤��շ��Ǣ�ͧ 6 ��С��

1) ෤�� �� (Modem) ��¶֧ ��ŧ ��С��ŧ��Ѻ ��֧��ػ�ó��Ѻ�ŧ�ѭ�ҳ�ԨԵ��ѭ�ҳ�й��͡ ��ŧ�ѭ�ҳ�й��͡��Ѻ��ѭ�ҳ�ԨԵ��ͧ��

2) ෤��ʴ�� ��෤��Ѻ�觢��Ť��٧�� к��ԨԵ�ŵ�ʹ��鹷ҧ�� ԡ�ô��¤��дѺ ��

1. �� 64-128 ��źԵ��Թҷ� ��Ѻ��ҹ��ӹѡ�ҹ��Ҵ��

2. �� 2 ��кԵ��Թҷ� ��Ѻͧ��÷��ͧ��ä��٧

3. ��ԡ�ú�ʹ�ù��ǵ�� 2 ��кԵ�� Ѻ��ǹ��ʧ

3) ෤��մ�� ��෤��շ��㹡�� xDSL �� ADSL, HDSL �ѡɳ��蹹�� ö�Ѻ�觢��Ҿ��§ ��٧ ��Թ��ѧ��ö��Ѿ��Ъ��´��Ũ�� Ե�� (slitter) ��˹�ҷ��¡�ѭ�ҳ ��ҧ��Ѿ��Ѻ�ػ�ó��

4) ෤��դ��٧��ʴ��ͪ ��ǹ��ʧ��к��ѭ�ҳ ��Ǣ�鹵�� 155 ��кԵ��Թҷ� ��٧�ش�ҡ�֧ 2. �ԡ�亵��Թҷ� �բ�ͨӡѴ��鹷ع�٧�ҡ ��ô��ѡ��ҡ ��¹��к��੾��鹷ҧ��ѡ�ͧ�ç��ä��Ҥ��ͧ��

5) ෤�� (cable modem) ��¶֧ �ػ�ó��㹡��Ѻ�觢��ż�ҹ�Թ��絤��٧�ͧ��ԡ��ŷ�� ǹ��ʧ��ŵ��ѧ�� ѧ��

6) ��-ǧ�� (leased line) ��¶֧ ��Ѿ��ǧ�÷��ҹ��ҹ��Ѻ�觢�� Ѻͧ��â�Ҵ�˭��Ң��

1.2 ෤��ա��â��

㹻Ѩ�غѹ�繷��ҡ ෤��ա��â�� 2 ��

1) ෤��Ѿ��͹�� ��෤��շ��Ѿ��͹��ö��áѹ��§ (voice) ��Т�ͤ�� (content) ��Ѿ��͹��Ѩ�غѹ��к� GSM ��Ҩҡ Global System for Mobile ��Թ 9600 �Ե��Թҷ� �к��վ�� (General Packet Radio Service-GPRS) ��к��紨 (Enhanced rates for GSM Evolution-EDGE) �� 32 ��źԵ��Թҷ�

2) ෤��մ��к��պ�� ��Ҩҡ�� Direct Broadcast Satellite (DBS) ��к��ѭ�ҳ�÷�ȹ��ҹ��¤��٧��ҹ��ǿ��ѧ��Ҫԡ�µç ��ҹ��Ҵ��鹼��ٹ��ҧ 60 ��.�繵��Ѻ�ѭ�ҳ

2. ��ѭ�ҳ

��ѭ�ҳ ��¶֧ �ػ�ó��ç��ä��Ҥ��Ф��ػ�ó�鹷ҧ��ѧ��·ҧ ��͡�� 2 ��ѡɳТͧ��

2.1 ��ѭ�ҳ�ҧ�� ��͡�� 3 Ẻ ��

1) ��ºԵ��Ǥ�� (twisted-pair line) ��·ͧᴧ�ѡɳкԵ��ǷӴ��·ͧᴧ��ҹ��Ҥ��ᾧ ��Ѿ��ҹ�� ٧�ش 128 ��кԵ��Թҷ�

2) ��¹ (coaxial cable) ��·ͧᴧ��թ�ǹ�� ª�ŵ��л�ͧ�ѹ�ѭ�ҳú�ǹ��թ�ǹ��¹͡�ա�� ѭ�ҳ�÷�ȹ� ��٧�ش 200 ��кԵ��Թҷ�

3) ��ǹ��ʧ (Fiber-optic) ��;��ʵԡ�ҧ � ��Ҵ��鹼��¤��ѹ �ѭ�ҳ�֧��١ú�ǹ �֧�Ѻ�觢�� 觢��ҡ�֧ 2 �ԡкԵ��Թҷ�

2.2 ��ѭ�ҳ�� �� 5 ��

1) �Թ��ô (infrared) ��Ѻ�ػ�ó�� Ѻ�觢�� 1-4 ��кԵ��Թҷ� ��зҧ�� 2-3 ��

2) ��Է�� (radio wave) �繤��俿�Ҥ�� ö�Թ�ҧ��ҡ�� ͧ��ѭ�ҳ �� Է�� Ϳ��

3) ��ǿ (radio microwave) �繤��Է�ط��դ��٧��¡�� ҹ��ǿ �Թ�ҧ��鹵ç ��ö��觡մ��ҧ�� Ѻ��ѭ�ҳ��ͧ��ҹ�Ѻ�ѭ�ҳ��ǿ ��ա��Ѻ�觻��ҳ 50 ��. �ҡ��ͧ�� е�ͧ��ʶҹշǹ�ѭ�ҳ��繷ʹ�

4) �к��ü�ҹ�� (Satellize) ��ҹ��ǡѺ��ǿ ��ѭ�ҳ�ҡʶҹ��觢��ѧ��ͧ�� ˹觷��ͧ�� ѭ�ҳ��Ѻ��ѧ��š��շӡ�âͧ��ǧ��

5) �к��Ẻ�� ��ػ�ó��ѧ�觵��ҹ�� 2.4 �ԡ��쵫� �� 3 Ẻ ��

(1) ��ٷٸ (bluetooth) ��Ѻ�� ö�觢��Ҥ��§��Т�ͤ�� 10 �� Է��

(2) �� (wireless fidelity-WIFI) ��ҵðҹ�ԨԵ��Ẻ�� ·��Ѻ�觢��Թ��絴��¤��٧ ��ջ��ҳ 100 �� ٧��Һ�ٷٸ��ҳ 10 ��

(3) ��Ϳ (Home Radio Frequency-Home RF) ��͢��ҵðҹ�Դ ��ͤ��ǹ�ؤ�Ũӹǹ��ҳ 10 ��ͧ ��ػ�ó��Թ 50 �� ҹ ��ӹѡ�ҹ��Ҵ��

3. ෤��ä��Ҥ��͢��¤��

㹻Ѩ�غѹ෤��ä��Ҥ��͢��¤��Ѳ�ҡ��ҧ�ҡ��Ǣ�ͧ�Ѻ��Ե��Ш��ѹ �� ô��÷�ȹ� ��Թ�� ෤��մ�ҹ��պ��ҷ��Ф��Ӥѭ�ҡ ��

1. �к��ú͡��˹觺��š ��ͷ��¡�� վ�� ��㹡�ú͡��˹觺��š �Դ�鹢��㹡Ԩ��÷�� ú͡��˹觡ͧ��ú��ط� ��ú͡��ź��͹�ͧ��֡

2. ��Ѿ��Դ�� (Pager) ��Ѿ��Ẻ�Դ��ͷҧ�� 觢�ͤ�� Ѩ�غѹ��

3. ��Ѿ��͹�� (Mobile Phone) ��ͷ��¡�ѹ�� Ѿ��Ͷ�� 繡��Ѻ�觢�� ҡ��ͧ�鹷ҧ��ҹ��ԡ��ѧ��Ѻ��·ҧ ��к�͹��͡ ��дԨԵ�� GSM �� CDMA

4. ��Ѿ��;� (IP Telephone) ��Ѿ��㹡��Ѻ��§��觷��ú�ԡ��Ѿ��ҧ��Ҷ١ŧ �¼��ͧ�դ��⿹ ��⾧ ��͡Ѻ�Թ��Ϳ��ö�Դ��Ѿ��

5. ��ü�ҹ�Թ�� (Internet Faxing) ��˹�ҷ��͹��Ѿ��;� ��§��¹�к��§��к��ͤ�� Ըա�÷ӧҹ�� м��Ѻ��ͧ��͡Ѻ�Թ��м��ԡ��ʾ��¹�鹨е�ͧ�պ�ԡ��Թ��絴�� ҡ��ö��ü�ҹ�Թ��ѧ��Ѿ��ͧ��û��·ҧ�� ѵ��ҤҤ��ö١ŧ�� 25-50 ��º��º�Ѻ��û��

6. �÷�ȹ��Թ�� (Web TV Network) �繤��˹�ҷ��ͧ��÷�ȹ��ҡѺ�к��Թ�� ÷�ȹ��ö�Ѻ��ͧ�Ѻ�÷�ȹ� ��÷�ȹ�е�ͧ��ѡɳо��ɷ��¡�� -��ͻ�� 駺��ͧ�Ѻ�÷�ȹ� ��Ѥ��Ҫԡ��ԡ�ô�ҹ��纷�� Ѿ��㹡�� ԡ��ö��Թ��Ъ��÷�ȹ��ѹ��

7. ��÷ӧҹ��ѹ�ͧ��(Workgroup Computing and Groupware) ��¶֧ ��÷��ͧ��ö��ѹ��͢�� Űҹ��ػ�ó��ҧ� ��ѹ�� ͧ�� ͧ�᡹��

8. ෤��ա�÷ӧҹ�ҧ��ӹѡ�ҹ��͹ �繡��෤��շ��ö�ӧҹ��ҹ��ͷ��㴡�� դ��ҡ��੾�С�÷ӧҹ��ҹ (home office) ��੾�Чҹ�ҧ��ҹ��ú�ԡ�� ӹѡ�ҹ�ѭ�� ӹѡ�ҹ��¤�� дǡ ��Ѵ��㹡��Թ�ҧ ��СѺ�ҹ��ҹ��ü�ԵẺ�ص��ˡ��ʶҹ��Ѻ᤺��С��͹حҵ �»Ѩ�غѹ�ӹѡ�ҹ��͹�ѡ��ٻẺ�ͧ��䫵�