Interface Configuration Guide 7705 SAR Interfaces
Edition: 01 3HE 11011 AAAC TQZZA 45
Each voice port can be configured to operate in either a two-wire or four-wire
(default) mode. The ports (in groups of three – ports 1 to 3 and ports 4 to 6) can also
be configured to operate in transmission-only mode, which provides a four-wire audio
path with no signaling. A transmit and receive transmission level point (the
analog-to-digital decibel level) can be configured for each port. See Table 4 for the
signaling type, companding law and audio wires configuration options on the 6-port
E&M Adapter card.
3.1.3.9.2 8-port Voice & Teleprotection Card
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
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
Table 4 Configuration Options for the 6-port E&M Adapter Card
Signaling Type Companding Type Number of Wires
Type I, Type II, Type V Mu-Law Two-wire or four-wire
Type V A-Law Two-wire or four-wire
Transmission-only (no signaling) Mu-Law or A-Law Four-wire
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