Configuring the negotiation parameters of ISDN layer 3 protocol

1. Enter system view.

system-view

N/A

2. Enter interface view.

interface interface-type interface-number

N/A

3. Set the length of the call reference adopted when the ISDN interface initiates a call.

isdn crlength call-reference-length

Optional.

The call reference length is 2 bytes for CE1 PRI and CT1 PRI interfaces and 1 byte for BRI interfaces by default.

4. Configure how the ISDN protocol handles CONNECT ACK messages.

isdn ignore connect-ack [ incoming | outgoing ]

Optional.

By default, if the router is communicating with an ISDN switch:

• The ISDN protocol must wait for the CONNECT ACK in response to the CONNECT message before it can switch to the ACTIVE state to start the data and voice service communications.

• After the ISDN protocol receives a CONNECT message, it needs to respond to the peer with a CONNECT ACK message.

5. Disable ISDN from carrying the HLC information element in SETUP messages when placing voice calls.

isdn ignore hlc

Optional.

By default, HLC information element is carried in SETUP messages when placing voice call.

6. Disable ISDN from carrying the LLC information element in SETUP messages when placing voice calls.

isdn ignore llc

Optional.

By default, LLC information element is carried in SETUP messages when placing voice call.

7. Configure the ISDN protocol to ignore the processing on the Sending Complete Information Element.

isdn ignore sending-complete [ incoming | outgoing ]

Optional.

As for the data exchange performed between a router and an ISDN switch, the default is as follows:

• For an incoming call, the router checks the received Setup messages for the Sending Complete Information Element to determine whether or not the number is received completely. If a Setup message does contain the Sending Complete Information Element, the number is not received completely.

• For outgoing calls, a Setup message containing the Sending Complete Information Element indicates the number is sent completely.

8. Set the time-out value of an ISDN Layer 3 timer.

isdn l3-timer timer-name time-interval

Optional.

The default time-out value of an ISDN L3 timer varies by ISDN protocol type. By default, the DSS1 ISDN L3 timers are set in seconds as follows:

• T301 defaults to 240.

• T302 defaults to 15.

• T303 defaults to 4.

• T304 defaults to 30.

• T305 defaults to 30.

• T308 defaults to 4.

• T309 defaults to 90.

• T310 defaults to 40.

• T313 defaults to 4.

• T316 defaults to 120.

• T322 defaults to 4.

9. Set the type and code scheme of calling or called numbers in incoming or outgoing ISDN calls.

isdn number-property number-property [ calling | called ] [ in | out ]

Optional.

By default, the system selects ISDN number type and code scheme depending on upper layer service. For more information, see Table 1.

10. Set the called number of ISDN interface to send in overlap mode (in this mode, the digits of each called number will be sent separately and the number of the digits sent each time can be set by the user).

isdn overlap-sending [digits ]

Optional.

In full-sending mode, all the digits of each called number will be collected and sent at a time by default.

ANSI

0

0

0

User-specified

0

1

0

National network identification

0

1

1

International network identification

0

0

0

0

Unknown/user-specified

0

0

0

1

Carrier identification code

0

0

1

1

Data network identification code (ITU-T Recommendation X.121)

AT&T

0

0

0

Unknown

0

0

1

International number

0

1

0

National number

1

0

0

Subscriber number

0

0

0

0

Unknown

0

0

0

1

ISDN/telephony numbering loan (Recommendation E.164/E.163)

1

0

0

1

Private numbering plan

DSS1

0

0

0

Unknown

0

0

1

International number

0

1

0

National number

0

1

1

Network specific number

1

0

0

Subscriber number

1

1

0

Abbreviated number

1

1

1

Reserved for extension

0

0

0

0

Unknown

0

0

0

1

ISDN/telephony numbering plan (Recommendation E.164)

0

0

1

1

Data numbering plan (Recommendation X.121)

0

1

0

0

Telex numbering plan (Recommendation F.69)

1

0

0

0

National standard numbering plan

1

0

0

1

Private numbering plan

1

1

1

1

Reserved for extension

ETSI

0

0

0

Unknown

0

0

1

International number

0

1

0

National number

0

1

1

Network specific number

1

0

0

Subscriber number

1

1

0

Abbreviated number

1

1

1

Reserved for extension

0

0

0

0

Unknown

0

0

0

1

ISDN/telephony numbering plan (Recommendation E.164)

0

0

1

1

Data numbering plan (Recommendation X.121)

0

1

0

0

Telex numbering plan (Recommendation F.69)

1

0

0

0

National standard numbering plan

1

0

0

1

Private numbering plan

1

1

1

1

Reserved for extension

NI

0

0

0

0

0

0

0

Unknown number in Unknown numbering plan

0

0

1

0

0

0

1

International number in ISDN numbering plan (Recommendation E.164)

0

1

0

0

0

0

1

National number in ISDN numbering plan (Recommendation E.164)

0

1

1

1

0

0

1

Network specific number in private numbering plan

1

0

0

0

0

0

1

Local (directory) number in ISDN numbering plan (Recommendation E.164)

1

1

0

1

0

0

1

Abbreviated number in private numbering plan

NTT

0

0

0

Unknown

0

1

0

National number

0

1

1

Network specific number

1

0

0

Subscriber number

0

0

0

0

Unknown

0

0

0

1

ISDN/telephony numbering plan (Recommendation E.164)

1

0

0

1

Private numbering plan

QSIG

0

0

0

0

0

0

0

Unknown number in Unknown numbering plan

0

0

0

0

0

0

1

Unknown number in ISDN/Telephony numbering plan (ITU-T Recommendation E.164/E.163)

0

0

1

0

0

0

1

International number in ISDN/Telephony numbering plan (ITU-T Recommendation E.164/E.163)

0

1

0

0

0

0

1

National number in ISDN/Telephony numbering plan (ITU-T Recommendation E.164/E.163)

0

1

1

0

0

0

1

Subscriber number in ISDN/Telephony numbering plan (ITU-T Recommendation E.164/E.163)

0

0

0

1

0

0

1

Unknown number in private numbering plan

0

0

1

1

0

0

1

Level 2 regional number in private numbering plan

0

1

0

1

0

0

1

Level 1 regional number in private numbering plan

0

1

1

1

0

0

1

PISN specific number in private numbering plan

1

0

0

1

0

0

1

Level 0 regional number in private numbering plan