CentelPBX provides the following interoperability features:

Robbed Bit Signaling Types

• FXS and FXO
• Loopstart
• Groundstart
• Kewlstart
• E&M
• E&M Wink
• Feature Group D

PRI Protocols

• 4ESS
• Lucent 5E
• DMS100
• National ISDN2
• EuroISDN
• BRI (ISDN4Linux)

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