Lucent Technologies 555-230-220 manual MFB/MAPD Circuit Pack

ASAI-Ethernet

D		MFB/MAPD Circuit Pack
E
	Virtual
F
	BRI Port 1
I		Table-Driven BRouter
N
I	Virtual		(up to 8 entries)
T
	BRI Port 2	Port 1	Client 1 Link 1
Y
		Port 2	Client 1 Link 2
B
a
c
k		Port 12	Client 2 Link 1
p
l	Virtual
a	BRI Port 12
n
e

Client 1

2 links

10Base-T Ethernet Client 2

1 link

Figure 13-6. Relationship of Virtual BRI Ports, Brouter, and DEFINITY LAN Gateway Clients

Due to the point-to-point nature of ASAI, the brouter uses an administered table to determine the valid clients for CallVisor ASAI over the DEFINITY LAN Gateway application. Each table entry provides a dedicated association between a client and a virtual BRI port. By using multiple table entries with different values for the client link, it is possible to provide a single client access to multiple virtual BRI ports. The DEFINITY LAN Gateway software represents itself to DEFINITY ECS as a BRI circuit pack. This means that DEFINITY ECS administration will continue to allow “ASAI” terminals to be assig ned to BRI ports. The BRI ports may be actual, as they are with ASAI-BRI, or virtual, as they are using the DEFINITY LAN Gateway application. If a BRI port is provided using the BRI circuit pack (TN556), then the BRI ports are actual. If a BRI port is provided using the DEFINITY LAN Gateway system assembly on the MFB, (TN2208 and TN2170), or (TN801) on the MAPD, then the BRI ports are virtual and tunneled over Ethernet TCP/IP.

Once a virtual BRI port is assigned in the brouter application, all its ASAI messages are sent to the administered client, if it is connected. The brouter also passes ASAI messages from DEFINITY LAN Gateway clients to the virtual BRI port and then to DEFINITY ECS.

To pass messages, the brouter references the table of virtual BRI ports, client host names, and link numbers. A maximum of 8 such connections or mappings can exist simultaneously (only 4 are useful in a DEFINITY G3s and DEFINITY ECS R5s2). Each entry in the table has the following form:

13-10Issue 7 May 1998