ICS Port Numbering
The following tables detail the default line, port, and DN numbering for Norstar ICS systems. ICS #1 is the main unit internal station module, ICS #2 the two trunk expansion slots. These are numbered right to left. Fibre ports are numbered from the bottom up, starting at (Module) 3.
Note, that by default, expansion trunk modules should be added from the highest port down, and expansion station modules from the lowest port up. This will minimise programing.
Modules will need to be disabled and re-enabled in order to be recognised by the processor - this is done in Maintenance. It is not necessary to re-start the ICS in order to add modules.
Series telephones use only the B1 DN. Other devices may need both B1 and B2 channels, therefore requiring B1 and B2 DN's.
Non-expanded system (ICS alone) numbering
| Module | Lines | Ports | B1 DN | B2 DN | DN Ports |
| ICS #2 | 001-048 | 201-248 | ---- | ---- | ---- |
| ICS #1 | ---- | ---- | 21-52 | 53-84 | 101-132 |
Two-port Expansion Cartridge and ICS numbering
| Module | Lines | Ports | B1 DN | B2 DN | DN Ports |
| Mod 04 | 049-072 | 401-412 | 269-284 | 333-348 | 401-416 |
| Mod 03 | 073-096 | 301-312 | 253-268 | 317-332 | 301-316 |
| ICS #2 | 001-048 | 201-248 | ---- | ---- | ---- |
| ICS #1 | ---- | ---- | 221-252 | 285-316 | 101-132 |
Six-port Expansion Cartridge and ICS numbering
| Module | Lines | Ports | B1 DN | B2 DN | DN Ports |
| Mod 08 | 049-072 | 801-812 | 333-348 | 461-476 | 801-816 |
| Mod 07 | 073-096 | 701-712 | 317-332 | 445-460 | 701-716 |
| Mod 06 | 097-108 | 601-612 | 301-316 | 429-444 | 601-616 |
| Mod 05 | 109-120 | 501-512 | 285-300 | 413-428 | 501-516 |
| Mod 04 | 121-132 | 401-412 | 269-284 | 397-412 | 401-416 |
| Mod 03 | 133-144 | 301-312 | 253-268 | 381-396 | 301-316 |
| ICS #2 | 001-048 | 201-248 | ---- | ---- | ---- |
| ICS #1 | ---- | ---- | 221-252 | 349-380 | 101-132 |
Twelve-port Expanded Cartridge and ICS numbering
| Module | Lines | Ports | B1 DN | B2 DN | DN Ports |
| Mod 14 | ---- | ---- | ---- | ---- | ---- |
| Mod 13 | ---- | ---- | ---- | ---- | ---- |
| Mod 12 | ---- | ---- | 397-412 | 589-604 | 1201-1216 |
| Mod 11 | ---- | ---- | 381-396 | 573-588 | 1101-1116 |
| Mod 10 | ---- | ---- | 365-380 | 557-572 | 1001-1016 |
| Mod 09 | ---- | ---- | 349-364 | 541-556 | 901-916 |
| Mod 08 | 049-072 | 801-812 | 333-348 | 525-540 | 801-816 |
| Mod 07 | 073-096 | 701-712 | 317-332 | 509-524 | 701-716 |
| Mod 06 | 097-108 | 601-612 | 301-316 | 493-508 | 601-616 |
| Mod 05 | 109-120 | 501-512 | 285-300 | 477-492 | 501-516 |
| Mod 04 | 121-132 | 401-412 | 269-284 | 461-476 | 401-416 |
| Mod 03 | 133-144 | 301-312 | 253-268 | 445-460 | 301-316 |
| ICS #2 | 001-048 | 201-248 | ---- | ---- | ---- |
| ICS #1 | ---- | ---- | 221-252 | 413-444 | 101-132 |