format_num
1: Selects GT-format
1 options which include nature-of-address and odd/even. Once
selected, the system enters GT-Format1 configuration mode.
2: Selects GT-format2
options which include translation-type.
Once selected, the system enters GT-Format2 configuration mode.
3: Selects GT-format3
options which include encoding-scheme, numbering-plan3 and translation-type.
Once selected, the system enters GT-Format1 configuration mode.
4: Selects GT-format4
options which include encoding-scheme, nature-of-address, numbering-plan,
and translation-type.
Once selected, the system enters GT-Format4 configuration mode.