Chapter 6 Configuring Additional Isdn Support - 3Com 3033 Configuration Manual

3Com Router Configuration Guide Addendum for V1.20

Chapter 6 Configuring Additional ISDN Support

ISDN configuration includes the following tasks:
•
Configuring the ISDN signaling type.
•
Configuring the negotiation parameters of ISDN Layer 3.
•
Configuring the SPID parameters of the National (NI) ISDN protocol.
6.1 Configuring ISDN Signaling Type
By default, DSS1 signaling is used on ISDN interfaces. You can configure:
•
DSS1 on BRI, E1 PRI, and T1 PRI interfaces
•
NI (National ISDN), NTT, ANSI, and ATT 5ESS (Lucent 5E) on BRI interfaces
•
NTT, ANSI, and ATT 5ESS (Lucent 5E) are configured with the negotiation
commands of Layer 3 within the DSS1 protocol.
6.2 Configuring the Negotiation Parameters of ISDN Layer 3
6.2.1 NTT Protocol
Table 6-1 Required NTT Protocol Commands
Operation
Disable the Sending-Complete
Information Element in the Setup message
Disable the SETUP ACK messages if the received SETUP
messages in data service calls do not carry the called number
information.
Table 6-2 Optional NTT Protocol Commands
Operation
Configure the SETUP message to ignore the high-level
compatibility information unit when a data call is initiated.
Restore the SETUP message.
Configure the SETUP message to ignore the low-level
compatibility information unit when a data call is initiated.
Restore the SETUP message.
Configure the router to wait for CONNECT ACK message
replies from the connected exchange until switching to the
ACTIVE state.
Command
undo isdn sending-complete
isdn ignore callednum
Command
isdn ignore hlc
undo isdn ignore hlc
isdn ignore llc
undo isdn ignore llc
isdn waitconnectack
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