- FXS, FXO, E+M, CAMA Ports Defined
- Analog Voice Port Signalling
- Analog Voice Port Configuration
Analog = Availability all around the world!
- FXS – Foreign Exchange Station – Fax Machine/Analog Phone
- FXO – Foreign Exchange Office – Central Office
- Ear and Mouth – E+M – Bridge to a PBX via analog. Match E+M card at PBX end and setup a trunk between VG and PBX.
- Centralised Automated Message Accounting – CAMA – Emergency dialling support solely. Connects to the PSTN. Deliver ANI information (Caller ID)
*DSP – Digital Signal Processor. Horsepower for the router to perform voice functions.
- Transmits key non-voice data: supervisory (ON/OFF hook) Addressing (DIGITS) and informational (Busy, RING etc…)
- FXS and FXO: Loop-Start (PSTN) and Ground-Start (PBX) – Makes intentional use of line. I want to ground out this line that Im going to use. Prevents ‘glare’.
- E+M Operation: (2/4 Wire), Type (1-3,5), Signalling (Immediate-,Wink-,Delay-Start)
- CAMA: Signalling (CAMA) and ANI Mapping
*FXS-DID – Direct Inward Dial – To dial in directly… T1 line into VG with a block of phone numbers. As phone number comes in, it will deliver what is dialled specifically.
via 2621xm router
- ‘show voice port summary’ – Ports and Sig Types are shown via this command
- Phone has a dial tone out of the box.
- voice-port 1/0/0 ?
- comfort-noise – Hissing
- signal ? – ground start or loop start
- cptone GB – Difference in tones across the world. Call progress tone.
- ring cadence – Amount of ringing, followed by silence.
- Phone number is not assigned under the voice-port
dial-peer voice 1000 pots
destination pattern 1000
csim start 1000 – will actually ring the phone from the VG! Test a dial-peer from the VG 🙂