View source for Upgrading old intercom system

== STENTOFON Pamex and [[TouchLine]] ==
 ''48 to 1040 lines''
'''Exchanges (1975-1995)'''
* Pamex
* Pamex MPC
* TouchLine
[[File:Upgrade old systems 1.png|thumb|left|500px]]
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'''Wiring and Stations'''
* Keep existing wiring (2 pairs, star wiring)
* Existing stations might be kept
[[File:Upgrade old systems 2.png|thumb|left|500px|Stations with article numbers 10006xxxxx & 1007xxxxxx]]
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== ST20 and P16/32 ==
'''Exchanges (1975-1999)'''
 ''16 to 32 lines''
* ST20
* Pamex 16/32 (P16/32)
* TouchLine Compact (TLC)
[[File:Upgrade old systems 3.png|thumb|left|500px]]
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'''Wiring and Stations'''
* Keep existing wiring (2 pairs, star wiring)
* Existing stations might be kept
[[File:Upgrade old systems 2.png|thumb|left|500px|Stations with article numbers 10006xxxxx & 1007xxxxxx]]
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== Micom ==
'''Micom (1982 - 1999)'''
 ''Exchangeless system''
[[File:Upgrade old systems 4.png|thumb|left|500px|Stations with article number 15xx]]
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Micom was a bus-based system using 3 pairs. Replacement options depends on existing structure:

=== Star connected ===
* Insert XE7 in the midle of the star and reuse cabling
* All Micom stations (15xx) must be swapped to analgoue stations (1007xxxxxx)
[[File:Upgrade old systems 6.png|thumb|left|500px]]
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=== Bus structure ===
* Replace entire system with IC-Edge
* Replace all stations with IP Stations (1008xxxxxx)
[[File:Upgrade old systems 5.png|thumb|left|500px|Edge system]]
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[[Category:AlphaCom Hardware]]