Nortel Networks 9150 - Manual (Page 52)

22 Remote Gateway 9150 Installation and Administration Guide
Remote Gateway 9150 description Standard 3.1
Call scenario 2: host-controlled—external corporate call
The following diagram shows how a call is routed when making a
host-controlled call to a party outside the organization.
The network used to route the call is transparent to the user, and the dialing
requirement is the same for both. Calls work the same way in reverse, through
the host PBX site to the Remote Gateway 9150 site.
G101393
Up to 32 digital telephones
Branch office
(Chicago)
Host location
(Los
Angeles)
Called party
is local
pizza parlor
(Chicago)
User 1 User 2 User 3
2
Central office trunks
(ISDN BRI)
Ethernet network
1 3
RX TX
V.35
STATU S
4 3 2 1
L2 L1 L2 L1 L2 L1 L2 L1 MODU LE
COLL RX TX ETHER NET
POWE R
Remote Gateway 9150
PSTN
1
2
C
4
5
Host-controlled call (corporate external call)
ISDN PRI
Host
PBX
RLC
Voice over IP call
PSTN call
3
D
A
B