21 December, 2001
BIT SWITCHES
3-55
Service
Tables
G4 Internal Switch 13: D channel layer 3 (Attachment IE in S: SETUP)
No.
FUNCTION
COMMENTS
0
Not used
Do not change these settings.
1
Information transfer capability shift
down to retry transmission
0:
Shift down procedure disabled
(Default)
1:
Shift down and retry the call
1:
The machine changes the ISDN G3
information transfer capability informed in
the [SETUP] signal to “Speech” from “3.1
kHz audio” or to “3.1 kHz audio” from
“Speech” automatically and retries the
transmission.
The information transfer capability used in the
first try is determined by the setting of G4
internal bit switch 14 bit 0.
This switch is effective with some types of
exchangers and T/As where they only accept
calls with information transfer capability
“Speech”.
2
Attachment of calling ID and
subaddress
0:
No
1:
Yes
Normally, this bit should be at 0, because
most networks add the calling ID and
subaddress to the SETUP signal to the
receiver.
However, some networks may require the
machine to add this ID (and/or subaddress).
Only in this case should this bit be at 1.
3
Attachment of the Lower Layer
Capabilities
0:
No
1:
Yes
This bit determines whether Lower Layer
Capabilities are informed in the [SETUP]
signal.
Keep this bit at 0 in most cases.
4
Attachment of the Higher Layer
Capabilities
0:
Yes
1:
No
This bit determines whether Higher Layer
Capabilities are informed in the [SETUP]
signal or not.
Keep this bit at 0 in most cases.
5
Attachment of the channel
information element (CONN)
0:
No
1:
Yes
Keep this bit at 0 in most cases.
6
Attachment of the Higher Layer
Capabilities for ISDN G3
transmission
0:
Same as the bit 4 setting
1:
Not attached
This bit determines whether Higher Layer
Capabilities are informed in the [SETUP]
signal for ISDN G3 transmission. This switch
is effective in coping with communication
problems with some types of T/A and PBX
that do not respond to Higher Layer Capability
“G3”.
When this bit is set to 0, the setting depends
on the setting of bit 4.
Keep this bit at 1 in most cases.
