User guide

B-Channel – Port Association
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BRI ISDN Gateway User Guide
www.eurotech-communication.com
6. B-CHANNEL – PORT ASSOCIATION
Communiction through a Dual Cell is performed via ports on one end, and B-channels on the
other end: Each Dual Cell has two ports. Each port extends to a GSM module (containing a
SIM). The GSM module communicates to the GSM network.
On the opposite end of the Dual Cell, two B-channels communicate to the switching unit.
This section explains the assigning of B-channels to in-house phones and the allocation of calls
to Winner Series BRI Gateway ports.
Landline
Phone
GSM Cell
phone
Winner Dual Cell
BRI Gateway
PSTN
Switching
GSM Module
RJ-11
Incoming calls, from switching unit to
ISDN card: minimum digits (example
050-787-4444 = 10 digits
Outgoing calls, from ISDN card to
switching unit: maximum digits 4
(example 6001 = 4 digits)
ISDN (BRI) 2 x B-
Channels Mapped into 2
operating GSM SIM Cards