<MMEC> and <MMEGI> are the hexadecimal strings of the MMEC and MMEGI.
If there are less than 2 significant digits in <MMEC>, "0" digit(s) shall be inserted at the left side to fill the 2 digit coding.
If there are less than 4 significant digits in <MMEGI>, "0" digit(s) shall be inserted at the left side to fill the 4 digit coding.
The Mobile Station Roaming Number (MSRN) is used to route calls directed to an MS. On request from the Gateway
MSC via the HLR it is temporarily allocated to an MS by the VLR with which the MS is registered; it addresses the
Visited MSC collocated with the assigning VLR. More than one MSRN may be assigned simultaneously to an MS.
The MSRN is passed by the HLR to the Gateway MSC to route calls to the MS.
The Mobile Station Roaming Number for PSTN/ISDN routing shall have the same structure as international ISDN
numbers (MSISDN) in the area in which the roaming number is allocated, i.e.:
the country code of the country in which the visitor location register is located;
the national destination code of the visited PLMN or numbering area;
a subscriber number with the appropriate structure for that numbering area.