International Telecommunication Union � ITU
Fran�ais� Espa�ol
�
Site map Contact us Print version
� Home : ITU-T : Publications : Recommendations : Q�Series : Q.20 : Q.20 (11/88)
Recently posted�-� Search Recommendations
� �
Q.20�:�Comparative advantages of "in-band" and "out-band" systems �

Recommendation Q.20 (11/88)

Approved in 1988-11-25

Status : In force

Access : Freely available items

Available languages and formats :
�
Click on the Item

Click on the selected format
and language to get the document

� �
Format Size Posted Article Number
English

PDF Document PDF (acrobat)

51429 bytes 1990-05-29 E�15165�
Espa�ol

PDF Document PDF (acrobat)

56753 bytes 1990-05-29 S�15165�
Fran�ais

PDF Document PDF (acrobat)

58262 bytes 1990-05-29 F�15165�

Access :

TIES users

Available languages and formats :
�
Click on the Item

Click on the selected format
and language to get the document

� �
Format Size Posted Article Number TIES users
English

Word Document Word

34984 bytes 1990-05-29 E�15165� Download
Espa�ol

Word Document Word

45546 bytes 1990-05-29 S�15165� Download
Fran�ais

Word Document Word

44841 bytes 1990-05-29 F�15165� Download

�

Top�-� Feedback�-� Contact us�-� Copyright � ITU�2008�All Rights Reserved
Contact for this page :� ITU-T Publications
Updated :�2001/09/10		 �