2N SmartGate - User Manual User Manual

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5.3. Gateway for trunk line of PBX

Outgoing and incoming call establishing procedures is for illustration described for

analog phone connected to FXS interface. The rules for call establishing in case of trunk
line connection are the same, you have to program your PBX to route GSM calls to
SmartGate. We strongly recommend to check SmartGate’s function by connecting a
phone in case of interconnection with PBX trunk line.

5.3.1. Outgoing call on FXS interface

1. Hook off the telephone, you can hear the dial tone and the orange Line LED starts

flashing.

2. Dial the required GSM subscriber number. SmartGate receives tone dialing (DTMF)

by default. If your telephone transmits pulse dialing only, program SmartGate to
receive pulse dialing. 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 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 FXS 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, you can

hear the busy tone or any of the GSM provider’s messages.

6. When the called subscriber answers the call, a call is established. The orange Line

LED is permanently on during the call.

7. Hang up to terminate the call. The Line LED goes off. If the called subscriber hangs

up first, you can hear the busy tone.

5.3.2. Incoming call from GSM network

1. The CLI is compared with filled rows of GSM routing table. The call is rejected, or

routed to FXS interface – connected phone according to the routing table.

2. Ringing on FXS interface signals incoming call. The orange Line LED flashes during

ringing. If programmed so, SmartGate transmits the CLIP by FSK between the first
and second rings. Advanced telephone sets are able to display the CLI.

3. Hook off the phone to establish the call. The Line LED is permanently on during the

call.

4. Hang up to terminate the call. The Line LED goes off. If the called subscriber hangs

up first, you can hear the busy tone.