Ricoh A230, Руководство по обслуживанию, Страница: 869 / 1134

BIT SWITCHES
2-5
ISDN U
N
IT
A8
1
6
SM A230/A231/A232
Bit Switch 10 (Dch. Layer 1)
No. FUNCTION COMMENTS
6 INFO1 signal resend
0: Resend
1: No resend 0: Some DSUs may not reply to the INFO1 signal
with INFO2, if there is noise in the INFO1 signal
accidentally. Try changing this bit to 0, to resend
INFO1 before the machine displays “CHECK
INTERFACE”.
7 Loop back 4 mode
0: Disabled 1: Enabled This is normally kept at 0. However, set it to 1 for
British PTT approval tests.
Bit Switch 11 (Dch. Layer 2)
No. FUNCTION COMMENTS
0 Not used Do not change the factory setting.
1 Type of TEI used
0: Dynamic TEI
1: Static TEI This is normally fixed at 0. However, some
networks such as the Northern Telecom ISDN
may require this bit to be set at 1 (see below). In
this case, you may have to change the values of
bits 2 to 7.
Note for US National ISDN
Keep this setting at 0.
2
to
7
Static TEI value This is used in the USA with the DMS100
(Northern Telecom ISDN) exchanger.
Store the lowest bit of the TEI at bit 7 and the
highest bit of the TEI at bit 2.
Example: If the static TEI is 011000, set bits 3
and 4 to 1 and bits 2, 5, 6, and 7 to 0.
Bit switch 12 is not used. Do not change any of the factory settings.
Bit Switch 13: D channel layer 3 (Attachment IE in S: SETUP)
No. FUNCTION COMMENTS
0 Not used Do not change the factory settings.
1
2
Attachment of calling ID
0: No 1: Yes Normally, this bit should be at 0, because most
networks add the calling ID to the SETUP signal
to the receiver.
However, some networks may require the
machine to add this ID. Only in this case should
this bit be at 1.
Note for US National ISDN
Keep this setting 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 or
not.
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.