Allied Telesis OmniConnect/ISDN, Руководство пользователя

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OmniConnect / ISDN
User’s Manual Page 70
Part number 613-10787-00
Extension 1 is assigned the phone number 408.555.2121 and the settings for this
phone number are to generate an urgent ring tone and then forward after 4 rings
to a specified forward number.
The Caller ID number 510.555.2222 is also assigned to extension 1 and the
settings for this calling number are to generate a normal ring tone and not to
forward the call.
If an incoming call from 510.555.2222 is detected, the Caller ID settings will be
used to ring the phone in a normal fashion. For all other incoming calls, the
phone will be rung using the urgent ring tone and then forwarded to the assigned
forwarding number.
INTERNET TRAFFIC STOPS DURING CALL FORWARDING
The OmniConnect access device requires the use of both B channels in order to
forward a call. Therefore, if call forwarding is turned on for any incoming phone
calls and a phone call comes in, then the second B channel’s data connection is
dropped and the call while the call is forwarded. Look for OmniConnect’s
AO/DI feature to utilize the D channel for data traffic to avoid this scenario.
8.3. ISDN cause codes
This section describes ISDN BRI standard cause values that are received from the ISDN
switch when using during the ISDN call setup process. These values are sent from the ISDN
switch to the access device to indicate ISDN call status. Although ISDN service providers
generally define cause messages with decimal values, OmniConnect/ISDN series access
devices display the hexadecimal translation of the decimal value. Cause values are
standardized; however, each ISDN service provider uses its own version of the cause message
wording. Therefore, the cause messages shown in the following table might not match the
messages exactly as they appear on the error log.
Cause
Value
Hex
Value
Cause Message Definition
1 0x01 Unassigned
Number
The ISDN number was sent to the switch in
the correct format; however, the number is not
assigned to any destination equipment.
2 0x02 No route to
specified transmit
network
The ISDN exchange is asked to route the call
through an unrecognized intermediate
network.
6 0x06 Channel
Unacceptable
The service quality of the specified channel is
insufficient to accept the connection.
7 0x07 Call awarded and
delivered
The user is assigned an incoming call that is
connected to a channel with an established
call.
16 0x10 Normal Call
Clearing
Normal Call Clearing has occurred
17 0x11 User Busy
The called system acknowledges the
connection request, but is unable to accept the
call because all the B channels are in use.