User guide

160 SCOPIA 400/1000 Gateway User Guide
About Dialing In to the IP Network via the Gateway
Dialing Example 7: IP-ISDN-IP direct dialing—Gateway supports TCS4
The number string 9825645000^3333 is a call from an IP network endpoint
(Endpoint 1) to an IP network endpoint in another zone (Endpoint 2), through a
public ISDN network, as shown in Figure 4-1. Gateway A dials using TCS4,
while Gateway B is set to receive calls in TCS4 mode.
Figure 4-1 TCS4 Dialing
This number string consists of:
 9—The voice call service prefix in Gateway A in Zone A.
 82—The service prefix for a 2B video call in Gateway A in Zone A.
 5645000—The number of the destination Gateway B on the public
ISDN network.
 ^—The TCS4 delimiter configured in Gateway A.
 3333—The E.164 number of the destination IP Endpoint 2.
ABOUT DIALING IN
TO THE IP
N
ETWORK VIA THE
G
ATEWAY
The Gateway is responsible for routing incoming calls to the requested H.323
endpoints on the IP network.
When a terminal or phone on the ISDN network wants to reach an IP endpoint,
it has to dial at least one of the phone numbers assigned to the ISDN line
connected to the Gateway PRI ISDN port.
ABOUT I NCOMING C ALL
ROUTING
When a call originating on the ISDN or serial network reaches the Gateway, the
Gateway routes it to an IP network endpoint. This is achieved through one of
several incoming call routing methods that the Gateway supports. You can
enable any number of routing methods for each port, but at least one method
must be enabled for incoming calls to be routed through that port. The Gateway
routes an incoming call from the ISDN or serial network according to the
routing methods enabled for the ISDN or serial port, following this order of
priority: DID −>TCS4 −>IVR−>Default Extension.
Public
ISDN
IP
Gateway A
Gateway B
5645000
IP
Endpoint 1
Endpoint 2
3333