NETGEAR XM128 ISDN Dialing Pre-stored Phone Numbers, Endpoint Discriminator, S85 register values

Reference Guide for the Model XM128 ISDN Digital Modem

Dialing Pre-stored Phone Numbers

The ATDSn command, n=0,1,..,39, dials the (n+1)th phone number twice for both of the Multilink

PPPconnections. The command ATDSn+Sm, (n and n=0,1,...,39) dials the (n+1)th phone number for the first connection and the (m+1)th phone number for the second connection.

Example: ATDIS0+S1 [Enter] dials the number stored in location 0, and the number stored in location 1 for the MPPP connection.

Endpoint Discriminator

The Endpoint Discriminator option represents identification of the system transmitting the packet. This option advises a system that the peer on this link could be the same as the peer on another existing link. Some Multilink PPP implementations require the use of the Endpoint Discriminator option.

The Endpoint Discriminator consists of two components: Class and Address.

The Class field is one octet as stored in S-register S85 and indicates the identifier address space. Table 5-1 lists the valid values of the S85 register.

Table 5-1.	S85 register values
Value	Description
0	Null Class (by default).
1	Internet Protocol (IP) Address
2	IEEE 802.3 Globally Assigned MAC Address.
3	Locally Assigned Address.
4	PPP Magic-Number Block.
5	Public Switched Network Directory Number.

The Endpoint Discriminator Address field is of variable length from 0 to 20 octets and can be assigned by the ATEPD command:

ATEPD = <Octet_1,Octet_2,Octet_3,..,Octet_n>

5-4 Async to Sync PPP