Lucent Technologies DEFINITY Enterprise Communications Server Release 8.2 Administration For Network Connectivity Manual

IP Softphones 
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IP Softphones
This book focuses on administration for the trunk side of the DEFINITY IP Solutions offer. The administration 
of the line side (IP Softphones) is covered in DEFINITY ECS R8 Administrator’s Guide, 555-233-506. For 
completeness, a brief checklist of IP Softphone administration is presented here.
For R8, there are two main types of DEFINITY IP Softphone applications —...

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3  Add a DCP station (or change an existing DCP station) using the Station screen:
~Type [enter the phone model you wish to use, such as 6408D]
~Port: x if virtual, or the port number of an existing phone
~Security Code: [enter the user’s password]
~Media Complex Ext: [enter the extension of the H.323 station from the 
previous step]
~IP Softphone: y
~Go to page 2; Service Link...

IP Addressing 
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1  Networking Overview
IP Addressing
This section describes IP addressing, subnetting, and routing. 
Physical Addressing
The Address Resolution Protocol (ARP) software on the C-LAN circuit pack relates 
the 32-bit logical IP address, which is configured in software, with the 48-bit physical 
address of the C-LAN circuit pack, which is burned into the board at the factory. The 
C-LAN board has an ARP...

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Conversion between 
binary and decimalConversion from binary to decimal notation is accomplished by adding the powers of 
2 corresponding to the 1’s positions in each byte:
 IP Address ClassesThe IP address space (232 or about 4.3 billion addresses) has been divided into five 
groups, Classes A–E, to accommodate the need for different network sizes. Each 
class has a different...

IP Addressing 
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The IANA assigns a network address to an organization and a network administrator 
in the organization assigns the Host IDs associated with that Network ID to nodes 
within the organization’s network. 
The following table shows the ranges of network and host IDs, and the total number 
of IP addresses (# network IDs times # host IDs), for each class. 
You can tell the class of an...

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Subnetting
Subnetting is the grouping of IP addresses associated with a network ID into two or 
more subnetworks. The subnets of a network ID are visible only within the 
organization that owns the network ID; Internet routers route messages based on the 
network ID and the routers within the private organization differentiate between the 
individual subnets.
Reasons for...

IP Addressing 
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1  Networking Overview
The extended network prefix is then treated as a normal network ID. The remaining 
host ID bits define the host IDs within each subnet. For example, a block of IP 
addresses could be subdivided into four subnets by using 2 host bits to “extend” the 
network ID. Now there are 4 times as many (extended) networks and 1/4 as many 
hosts per network.
Note:In adding up the number of...

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Class-C subnetsThe following table shows that Class-C IP addresses can have 5 subnetting schemes, 
each with a different number of subnets per network. The first and last subnet, formed 
by using 1 and 7 bits respectively, are unusable because they result in either the 
subnet ID or the host ID having all zeros or all ones.
3-bit subnets
As an example, the third row of the table...

IP Addressing 
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Example
To continue the example using a 3-bit subnet ID, assume a Class C network ID of 
192.168.50.xxx. This network ID can provide 254 usable IP addresses, all on the 
same network — from 192.168.50.1 to 192.168.50.254. If we divide this network into 
3-bit subnets, we will have 6 usable subnets with 30 usable IP addresses in each 
subnet. Note that we have lost 74 usable IP...

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The other four possible subnetting schemes for Class C addresses, using 2, 4, 5, and 6 
subnet bits, are formed in the same way. Which of the 5 subnetting schemes to use 
depends on the requirements for the number of subnets and the number of hosts per 
subnet.
Class-A and Class-B 
subnetsFor Class A and Class B IP addresses, subnets can be formed in the same way as for 
Class C...