General DataComm DeskTop T1, Инструкция по установке и эксплуатации

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2-6 Installation
GDC 048R154-000
Table 2-2 Option Application Notes — Switchbank S14, Network
Characteristics
(Continued on next page)
Option Selection Switch Position Description
Network
Coding B8ZS* S14-1 Off* Selects Bipolar with 8 Zero Substi-
tution (B8ZS) encoding for the
network side
AMI S14-1 On Selects Alternate Mark Inversion
(AMI) encoding for the network
side.
The DSU enforces an 8 x (N+1)
ones density requirement when
AMI is selected in combination
with framed N x 64k operation and
consecutive DS0s, or with un-
framed operation.
Network ESF
Mode ANSI
T1.403* S14-2 Off* Selects compliance with ANSI
network performance messages
(per Bellcore TR-TSY-000194),
available only with ESF framing.
TR 54016 S14-2 On Selects compliance with network
maintenance messages per PUB
54016, available only with ESF
framing.
Network TX
Timing Receive* S14-3
S14-4 Off* or On
Off*
On
The DSU recovers receive T1
clock from the network receive T1
data and uses it as the send timing
source for T1 data output to the
network.
Note:
Both settings provide the same
result.
DTE S14-3
S14-4 Off
On The DSU translates the clock taken
from the Ext Clk signal provided
by the DTE and uses it as the send
timing source for T1 data output to
the network.
Internal S14-3
S14-4 On
Off The DSU provides the send timing
source for T1 data output to the
network.
* Factory default selection.