The 8-port Voice & Teleprotection card supports the transport of an analog voiceband signal between two analog devices over a digital network.
The card has two FXS RJ-45 ports and two FXO RJ-45 ports that support analog voiceband signals. The analog signals are converted into a 64 kb/s digital Pulse Code Modulation (PCM) format using either Mu-Law (North America) or A-Law (Rest of World) companding. The type of companding is selectable on a per-card basis. Companding conversion (that is, Mu-Law to A-Law or vice versa) is not supported.
The signaling type is selectable at the port level on a per-port basis depending on companding type.
FXO supports:
1511profile1 (1511 Loop Start) – A-Law companding
3600ls (Loop Start) – Mu-Law companding
3600re (Remote Extension) – A-Law companding
1511sn137 (1511 profile 137) – A-Law companding
FXS supports:
3600plar (Private Line Automatic Ringdown) – A-Law and Mu-Law companding
1511plar – A-Law companding
1511profile1 (Loop Start) – A-Law companding
3600ls (Loop Start) – Mu-Law companding
3600re (Remote Extension) – A-Law companding
1511sn137 (1511 profile 137) – A-Law companding
The default signaling type for FXO and FXS is 3600ls for Mu-Law companding and 3600re for A-Law companding.