2N Fixed line replacement with 2N SmartGate - Manual v1.1.2 - Manual (Page 58)

Voice function 4.1
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numbers. Tariff metering is transmitted only during calls to GSM network.
Connected PBX must provide the tariff metering during calls to FXO interface.
You can also program 2N® SmartGate to transmit tariff pulses as call
connect/disconnect signaling if your PBX cannot receive telephone line polarity
reversal signaling.
Gateway for extension line of PBX
Extension line of PBX is connected to FXO interface on SmartGate. FXS interface
remains unconnected.
You have to program parameter “FXO call route to” for proper function on FXO
interface. You can fill in some rows in FXO routing table to reject given calls, for
automatic call routing etc.
Fill in GSM routing table to route an incoming GSM calls to FXO interface.
It is necessary to set up conditions for call-disconnect detection from PBX. If
2N® SmartGate detects busy tone or continuous tone from PBX, it disconnects the
established GSM call.
Outgoing call on FXO interface
1. 2N® SmartGate detects a ringing signal from PBX and, if it is possible to
establish GSM call, it hooks off the line after preprogrammed number of rings.
2N® SmartGate transmits dial tone and green LED for line starts flashing.
2. Dial the GSM subscriber number using DTMF. The delay between dialed digits
may not exceed 5 s (programmable parameter). The number is evaluated as
complete after this timeout.
3. A short delay follows the last-dialed digit for 2N® SmartGate to await further
dialing. Then, the dialing end is signaled and connection is established.
4. Prefix of dialed number is compared with filled rows of FXO routing table. The
call is rejected or routed to GSM network according to the routing table.
5. If the called subscriber is available, you can hear the ringing tone. If not, 2N®
SmartGate hangs up.
6. When the called subscriber answers the call, a call is established. The green
Line LED is permanently on during the call.
7. Hang up to terminate the call. PBX sends busy tone to SmartGate‟s subscriber
line, 2N® SmartGate detects it and disconnects the GSM call.
Incoming call from GSM network
1. The CLI is compared with filled rows of GSM routing table. The call is rejected,
or routed to FXO interface – extension line of PBX according to the routing
table.
2. 2N® SmartGate hooks off the line. If there is filled in the “Dial in” parameter
for given CLI, 2N® SmartGate dials it using DTMF.
3. The GSM subscriber hears the ringing tone from PBX if the automatic dial in
function was applied, if not he hears dial tone from PBX and he can dial
required extension himself.
4. The call termination is the same as in case of outgoing call.