IEs: SS7-ISUP, DSS1 Called party number, Redirection number 


                  SS7-ISUP                        DSS1

           8  7  6  5  4  3  2  1          8  7  6  5  4  3  2  1
        1  b  a  a  a  a  a  a  a       1  0  1  1  1  0  0  0  0
        2  d  c  c  c  - spare --       2  --------length--------
        3  gg-2nd-ggg  gg-1st-ggg       3  k  j  j  j  i  i  i  i
        .                               4  0  ---number digits---
        .                                           ...
        n  --filler--  gg-nth-ggg       n  0  ---number digits---
Az ISDN hívószám és cím felépítése az ITU-T I.330 és E.164 ajánlások alapján:

   +--------------+---------------------------+-------------------+-------------+
   |      CC      |          NDC              |       SN          |     SA      |
   | Country Code | National Destination Code | Subscriber Number |  SubAddress |
   +--------------+---------------------------+-------------------+-------------+

Az SA továbbítására külön információs elem szolgál: Called Party Subaddress

SS7-ISUP tags

a) Nature of address indicator 
0 0 0 0 0 0 0  -  spare
0 0 0 0 0 0 1  -  subscriber number (national use)
0 0 0 0 0 1 0  -  unknown (national use)
0 0 0 0 0 1 1  -  national (significant) number
0 0 0 0 1 0 0  -  international number
0 0 0 0 1 0 1  -  network-specific number (national use)

0 0 0 0 1 1 0
      to       -  spare
1 1 0 1 1 1 1

1 1 1 0 0 0 0
      to       -  reserved for national use
1 1 1 q 1 1 0

1 1 1 1 1 1 1  -  spare

 b)    Odd/even indicator
 0 - even number of address signals
 1 - odd number of address signals

c)  Numbering plan indicator
0 0 0   spare
0 0 1   ISDN (Telephony) numbering plan (Recommendation E.164)
0 1 0   spare
0 1 1   Data numbering plan (Recommendation X.121) (national use)
1 0 0   Telex numbering plan (Recommendation F.69) (national use)
1 0 1   reserved for national use
1 1 0   reserved for national use
1 1 1   spare

d)  Internal Network Number indicator (INN ind.)
0       routing to internal network number allowed
1       routing to internal network number not allowed

g)      Address signal
0 0 0 0 - digit 0
0 0 0 1 - digit 1
0 0 1 0 - digit 2
0 0 1 1 - digit 3
0 1 0 0 - digit 4
0 1 0 1 - digit 5
0 1 1 0 - digit 6
0 1 1 1 - digit 7
1 0 0 0 - digit 8
1 0 0 1 - digit 9
1 0 1 0 - spare
1 0 1 1 - code 11
1 1 0 0 - code 12
1 1 0 1 - spare
1 1 1 0 - spare
1 1 1 1 - ST
The most significant address signal is sent first. Subsequent address signals
are sent in successive 4-bit fields.

h)      Filler
In case of an odd number of address signals, the filler code 0000 is inserted
after the last address signal.

DSS1 Called party number

The purpose of the Called party number IE is to identify the called party of a call. The maximum length of this IE is network dependent. 

           8  7  6  5  4  3  2  1
        1  0  1  1  1  0  0  0  0
        2  --------length--------
        3  k  j  j  j  i  i  i  i
        4  0  ---number digits---
                    ...
        n  0  ---number digits---
i) Numbering plan identification (NPID)

Numbering plan (applies for type of number = 000, 001, 010 and 100) 

        Bits
        4  3  2  1
        0  0  0  0 - Unknown (Note 6)
        0  0  0  1 - ISDN/telephony numbering plan (Recommendation E.164 [19])
        0  0  1  1 - Data numbering plan (Recommendation X.121 [21])
        0  1  0  0 - Telex numbering plan (Recommendation F.69 [22])
        1  0  0  0 - National standard numbering plan
        1  0  0  1 - Private numbering plan
        1  1  1  1 - Reserved for extension
        All other values are reserved.
NOTE 6 - The numbering plan "unknown" is used when the user or network has no knowledge of the numbering plan. In this case the number digits field is organized according to the network dialling plan, e.g. prefix or escape digits might be present.

j) Type of number 

        Bits
        7  6  5
        0  0  0 - Unknown (Note 2)
        0  0  1 - International number (Note 3)
        0  1  0 - National number (Note 3)
        0  1  1 - Network specific number (Note 4)
        1  0  0 - Subscriber number (Note 3)
        1  1  0 - Abbreviated number (Note 5)
        1  1  1 - Reserved for extension
        All other values are reserved.
NOTE 1 - For the definition of international, national and subscriber number, see Recommendation I.330 [18].

NOTE 2 - The type of number "unknown" is used when the user or the network has no knowledge of the type of number, e.g. international number, national number, etc. In this case the number digits field is organized according to the network dialling e.g. prefix or escape digits might be present.

NOTE 3 - Prefix or escape digits shall not be included.

NOTE 4 - The type of number "network specific number" is used to indicate administration/service number specific to the serving network, e.g. used to access an operator.

NOTE 5 - The support of this code is network dependent. The number provided in this information element presents a shorthand representation of the complete number in the specified numbering plan as supported by the network. See also the Speed Call feature.

k) Ext.

Number digits: (IA5 characters) (Note)

NOTE - The number digits appear in multiple octet 4's in the same order in which they would be entered, that is, the number digit which would be entered first is located in the first octet 4.

This field is coded with IA5 (ASCII) characters, according to the formats specified in the appropriate numbering/dialling plan.