Computer System Requirements; Isdn Ordering Information By Switch Type - 3Com DIGITAL MODEM User Manual

Table 1-1 ISDN Ordering Information by Switch Type
ISDN Line
Configuration AT&T
Parameter Custom
Line Code 2B1Q (no NT1
required)
Directory 1
Numbers
Channels 2B alternate
circuit-switched
data and voice
Terminal Type A with
Point-to-Point
TEI Dynamic
Call Idle
Appearances
Supplemental None
Voice Features
EKTS Features No
D Channel No
Packet
B Channel No
Packet
* Two directory numbers are required for Models 3C872 and 3C877. This allows a voice call and a
call using the internal analog fax modem to occur at the same time.

Computer System Requirements

Connect the model 3C871 or 3C872 3Com Impact digital
modem to an IBM-compatible computer. Connect the model
3C876 or 3C877 3Com Impact digital modem to an Apple
Macintosh computer. Connect the digital modem to a
computer that meets UL standards in the United States or is
certified to CSA standards in Canada.
AT&T 5ESS
â
5ESS National
ISDN-1
2B1Q (no NT1
required)
* *
1
2B alternate
circuit-switched
data and voice
A with
Point-to-Point
Dynamic
Idle
None
No
No
No
Computer System Requirements
ISDN Switch Type
Northern
Telecom
DMS100
National
ISDN-1
2B1Q (no NT1
required)
2
2B alternate
circuit-switched
data and voice
Functional PVC 2 Functional
Dynamic
—
None
No
No
No
â â
Siemens
EWSD
National
ISDN-1
2B1Q (no NT1
required)
*
1
2B alternate
circuit-switched
data and voice
Dynamic
—
None
No
No
No
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