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Introduction
MultiModemISI Hybrid Series, ISIHP-2S/2U/4S/4U/4SD 9
Communication Protocols for ISIHP Ports
Ports on the ISIHP card can be associated with different protocols, as
follows:
Auto-Protocol. Modem or terminal adapter automatically negotiates
with host to operate using the hosts current protocol.
Central Site Modem. Common designation for analog modems built
into the ISIHP card. These are V.90 modems. For the ISIHP-2S/2U,
the last four modems should be designated as Central-Site modems;
for the ISIHP-4S/4U, the last eight modems should be designated as
Central-Site modems. (See Port/Device table on previous page.)
MultiLink PPP async. This protocol allows the functional bundling
together of three WAN ports so they function as a single high-
bandwidth data pipeline using only one IP address. Bundling occurs
on demand when the needed bandwidth exceeds that available on a
single circuit.
PPP async. (Point-to Point Protocol, asynchronous) Protocol
allowing computers a dial-up connection to the Internet. PPP includes
error detection, data compression and other improvements over Serial
Line Internet Protocol (SLIP) connections.
V.120. Terminal rate adaptation protocols. These apply to ISDN B-
channels when using a V interface. This protocol includes V.110.
X.75. An international standard that allows X.25 packet-switched
networks to communicate with each other. X.75 is a gateway protocol
for interconnection of X.25 public networks.