1、ITU-T RECMN*R-l14 93 4862591 0590330 071 INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STAN DARD IZATION SECTOR OF ITU TELEGRAPHY TELEGRAPH TRANSMISSION R.114 (03193) NUMBERING OF INTERNATIONAL TDM CHANNELS ITU-T Recommendation R.114 (Previously “CCITT Recommendation”) ITU-T RECMN*R-
2、L14 93 48b2591 0590333 TO8 FOREWORD The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of the International Telecom- munication Union. The ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standar
3、dizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which meets every four years, established the topics for study by the ITU-T Study Groups which, in their turn, produce Recommendations on these topics. ITU-T Recommendation R.114 was revise
4、d by the ITU-T Study Group IX (1988- 1993) and was approved by the WTSC (Helsinki, March 1-12, 1993). NOTES 1 As a consequence of a reform process within the International Telecommunication Union (ITU), the CCITT ceased to exist as of 28 February 1993. In its place, the ITU Telecommunication Standar
5、dization Sector (ITU-T) was created as of 1 March 1993. Similarly, in this reform process, the CCIR and the IFRB have been replaced by the Radiocommunication Sector. In order not to deIay publication of this Recommendation, no change has been made in the text to references containing the acronyms “C
6、CITT, CCIR or IFRB” or their associated entities such as Plenary Assembly, Secretariat, etc. Future editions of this Recommendation will contain the proper terminology related to the new ITU structure. 2 telecommunication administration and a recognized operating agency. In this Recommendation, the
7、expression “Administration” is used for conciseness to indicate both a O ITU 1994 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the ITU. IT
8、U-T RECNNJR.LL4 93 48b259L 0590332 944 m Recommendation R.114 NUMBERING OF INTERNATIONAL TDM CHANNELS (Malaga-Torremolinos, 1984; amended at Melbourne, 1988 and at Helsinki, 1993) The CCITT, considering (a that in view of the introduction in the international service of time division multiplex (TDM)
9、 channels with different characteristics, configured for various nominal modulation rates and for different character structures, it has become necessary to evolve a method of numbering TDM channels; (b) that this numbering method must make it possible to recognize: - - the type of TDM (code-depende
10、nt or code-independent); the nominal modulation rate and (in the case of code-dependent TDM) the character length; - the position of the channel in the frame, unanimously deciares the view 1 shown in Table 1. The channels in an international TDM system conforming to Recommendation R.lO1 should be nu
11、mbered as 2 should correspond to its position in the multiplex tables in Recommendation R.lO1. The number assigned to a channel should be selected from the series applicable to the type Of channel and 3 Table 2. The channels in an international TDM system conforming to Table 1R. 1 11 should be numbe
12、red as shown in 4 The channels in systems conforming to Table lR.111 should be numbered in the same way as their positions in the frame; i.e. in the sequence from 1 to 255 excluding the channel numbers that are multiples of 16. In establishing a channel having a rate of more than 50 bauds, the numbe
13、r assigned coincides with the number of the first 50 baud channel taking part in the integration. 5 International TDM channels to Recommendation R.112 should have the numbering scheme shown in Table 3. 6 should correspond to its position in the Figure 1R.112. The numbers assigned to the channels sho
14、uld be selected from the series applicable to the type of channel and 7 numbering schemes shown in Tables 3 and 4, respectively. International code independent and code dependent channels to Recommendation R. 102 should have the 8 should correspond to its position in Tables 2R. 102 to 4/R. 102 to Re
15、commendation R. 102. The numbers assigned to the channels should be selected from the series applicable to the type of channel and 9 should be in accordance with the numbering scheme in Tables 1R. 114 and 4R. 114. Channel numbering of 50 baud channels for branch-line muldexes conforming to Recommend
16、ation R. 103 10 numbered as shown in Tables 5 and 6. Telegraph channels in an international TDM system conforming to Recommendation R. 1 13 should be 11 The location of the channel in the aggregated signal frame is defined by the three last digits of the number (D2, D3, D4). D2 and D3 define the con
17、ventional sequence number of the first envelope forming the selected group of telegraph channels. D4 defines the number of the telegraph channel in the group selected (in the envelope). Recommendation R.114 (03/93) 1 The correspondence between conventional and real number n of the envolope within th
18、e frame is as follows: For multiplexing scheme according to Recommendation X.5 1 (Recommendation X.56): n + 44 = D2D3 where n = 1,2, . 20 = the real numberoftheenvelope. D4 = 1,2, . 8 For multiplexing scheme according to Recommendation X.50 (see Recommendation X.55): n + 74 = D2D3 where n = 1,2,3 .
19、20 = the real number of the envelope. D4 = 1,2, . 6 so TABLE 1R.114 oso1 - os46 Numbering scheme for TDM systems conforming to Recommendation R.lO1 100 110 I Nominal modulation rate (bauds) 1001 - 1023 (for 10 unit, 1008 not used) 1701 - 1723 (for 7% unit, 1708 not used) 1101- 1123 (1108notused) Cha
20、nnel numbers 1 so 200 300 1501 - 1515 2001 - 201 1 (for 10 unit, 2008 not used) 2101 - 21 11 (for 11 unit, 2108 not used) 2701 - 271 1 (for 7% unit, 2708 not used) 3001 - 3007 (for 10 unit) 3101 - 3107 (for 11 unit) 75 0701 - 0742 (for alternative A). See Table 3R.101 for numbers not used 0701 - 073
21、1 (for alternative B, 0716 not used) I 134.5 1 1301-1315 2 Recommendation R.114 (03/93) TABLE 2/R. 114 I 50 Numbering scheme for TDM systems conforming to Table 1m.111 5001 - 5255 (The numbers 16,32,48,64,80,96,112,128,144,160, 176, 192, 208,224 and 240 are not used) I I I 100 200 (300) 600 Nominal
22、Maximum distortion modulation rate (bauds) 5 5 (7.5) 7.5 6001 - 6127 (The numbers 16,32,48,64,80,96 and 112 are not used) 7001 - 7063 (The numbers 16,32 and 48 are not used) 8001 - 8031 (The number 16 is not used) Channel numbers Nominal modulation I Maximum degree of isochronous distortion R.112 (2
23、400 bitls) I 1200 I 7.5 I 8101 -8115 R.102 (4800 bitls) TABLE 3m.114 50 100 200 Numbering scheme of code independent channels for TDM systems conforming to Recommendations R.112 and R.102 8.3 5801 - 5815 5801 - 5831 (5816 not used) 8.3 6801 - 6807 6801 -6815 8.3 7801 - 7803 7801 - 7807 Channel numbe
24、rs rate (bauds) due to sampling Recommendation R.114 (03/93) 3 ITU-T RECMN*R.lLU 93 m U862591 0590335 653 Nominal modulation rate (bauds) 50 75 TABLE 4R.114 Channel numbers O501 - 0592 0701 - 0746 Numbering scheme of code dependent channels for TDM systems conforming to Recommendation R.102 110 134.
25、5 150 1101-1146 1301 - 1331 (1316 not used) 1501 - 1531 (1516 not used) 100 300 1001 - 1046 (for 10 unit) 1701 - 1746 (for 7.5 unit) 3001 - 3015 (for 10 unit) 3101 -3115 (for 11 unit) Nominal modulation rate (bauds) 50 210 Maximum distortion (a) Channel numbers 4.25 545 1 - 5648 (The numbers ended i
26、n digits D4 = O, 9 are not used) 2001 - 2023 (for 10 unit, 2008 not used) 2101 - 2123 (for 11 unit, 2108 not used) 2701 - 2723 (for 7.5 unit, 2708 not used) 100 200 (300) 600 4.25 4.25 (6.25) 6.25 TABLE 5R. 1 14 6451 - 6644 (The numbers ended in digits D4 = O, 9,8,7,6 and 5 are not used) 745 1 - 764
27、2 (The numbers ended in digits D4 = O, 9,8,7,6,5.4 and 3 are not used) 9451 - 9441 (The numbers ended in digits D4 = O, 9,8,7,6,5.4,3 and 2 are not used) 4 Recommendation R.114 (03/93) ITU-T RECMN*R-334 93 4862593 0590336 57T m 100 (50) 200 TABLE 6/R. 114 6.25 (3.1) 6.25 6751 - 6946 (The numbers end
28、ed in digits D4 = O, 9.8 and 7 are not used) 7751 - 7943 (The numbers ended in digits D4 = O, 9, 8,7, 6,5 and 4 are not used) Numbering scheme of telegraph channels for TDM systems conforming to Recommendation R.113 (multiplexing scheme X.51 and X.55) 600 Nominal modulation (bauds) I rate 6.25 975 1 - 9941 (The numbers ended in digits D4 = O, 9,8,7,6,5,4,3 and 2 are not used) Channel numbers 8751 - 8942 (The numbers ended in digits D4 = O, 9,8,7,6,5,4 and 3 are not used) 1 300 I 6.25 1 Recommendation R.114 (03/93) 5
