HP MSR2000/3000/4000 Router Series Layer 2 - WAN Configuration Guide

66
Configuring negotiation parameters of ISDN
Q.931 protocols
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter ISDN BRI or PRI
interface view.
interface interface-type
interface-number
N/A
3. Set length of the call
reference used when a call is
placed on an ISDN
interface.
isdn crlength call-reference-length
By default, the call reference length is
2 bytes for CE1/PRI and CT1/PRI
interfaces and 1 byte for BRIs.
4. Configure how the ISDN
protocol handles a
CONNECT ACK message.
isdn ignore connect-ack
[ incoming | outgoing ]
By default, when the device is
communicating with the PBX:
• The ISDN protocol must wait for a
CONNECT ACK message in
response to a CONNECT
message before it can switch to
the active state to start data and
voice service communications.
• The ISDN protocol needs to reply
to the peer with a CONNECT
ACK message after receiving a
CONNECT message and switch
to the active state.
5. Disable ISDN from carrying
the HLC information element
in setup messages sent when
placing voice calls.
isdn ignore hlc
By default, setup messages carry the
HLC information element when ISDN
places voice calls.
6. Disable ISDN from carrying
the LLC information element
in setup messages sent when
placing voice calls.
isdn ignore llc
By default, setup messages carry the
LLC information element when ISDN
places voice calls.
7. Configure the ISDN protocol
to ignore the processing on
the sending complete
information element.
isdn ignore sending-complete
[ incoming | outgoing ]
By default, when the device
communicates with the PBX:
• For an incoming call, the device
checks a received setup message
for the sending complete
information element to determine
whether or not the number is
received completely. If a setup
message does not contain the
sending complete information
element, the number is not
received completely.
• For an outgoing call, a setup
message containing the sending
complete information element
indicates the number is sent
completely.