CO Trunk Lines - PABX to CO switch
Interoffice Trunks - CO to CO switch trunk (inter-CO-office)
Foreign Exchange (FX) Trunks:
FXO - extending a phone line to a PABX, Cisco router or telco
FXS - connections telephones, faxes and modems (end-points)
Trunk Line Types
Private Trunk Lines (tie-lines) - PABX to PABX - E&M interfaces
CO Trunk Lines - PABX to CO switch
Interoffice Trunks - CO to CO switch trunk (inter-CO-office)
Foreign Exchange (FX) Trunks:
FXO - extending a phone line to a PABX, Cisco router or telco
FXS - connections telephones, faxes and modems (end-points)
CO Trunk Lines - PABX to CO switch
Interoffice Trunks - CO to CO switch trunk (inter-CO-office)
Foreign Exchange (FX) Trunks:
FXO - extending a phone line to a PABX, Cisco router or telco
FXS - connections telephones, faxes and modems (end-points)
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