ADTRAN ISU 128 User manual

Trademarks:
DMS-100 is a trademark of
Northern
Telecom.
ISU is a trademark ofADTRAN, Incorporated.
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trademark
ofApple Computer, Incorporated.
Stac is a register trademark
and
LZS
is a trademark of Stac Electronics.
Windows is a registered trademark ofMicrosoft Corporation.
5ESS
is a registered trademark of
AT&T.
901 Explorer Blvd.
P.O. Box 070200
Huntsville,
AL 35807
Phone: [phone]
Fax: [phone]
© 1996 ADTRAN, Inc.
All
rights
reserved.
Printed
in
USA.
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ISU
128
128
kbps
ISDN
Service
Unit
User
Manual
61202.029L2-
l B
Part
Numbers
1202029L2
1202029L3
115
VAC
115 VAC with V.34 Modem Option
~
September
1996
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......

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FCC
regulationsrequire
that
the
followinginformationbeprovided
to
the customer
inthis
manual.
1.
If
your
telephone
equipment
( ISU 128) causes
harm
to
the
telephone network,
the
telephone
company
may
discontinue
your
servicetemporarily.
If
possible, theywill
notify
you
in
advance. But if
advance
notice
isn't
practical,
you
will
be
notified as
soon
as possible. You will
be
advised
of
your
right
to file a
complaint
with
the
FCC.
2.
Your telephone
company
may
make
changes
in
itsfacilities,
equipment,
operations,
or
procedures
that
could
affect
the
proper
operation of
your
equipment.
If
they do,
you
will
be
given
advance
notice so as to give
you
an
opportunity
to
maintain
uninterrupted
service.
3.
If
you
experience trouble
with
this
equipment
( ISU 128), please contact ADTRAN
(see inside
back
cover) for
repair/warranty
information. The telephone
company
may
ask
you
to disconnect this
equipment
from
the
network
until
the
problem
has
been
corrected,
or
until
you
are
sure
the
equipment
is
not
malfunctioning.
4.
This
unit
contains
no
user-serviceable parts.
To ADTRAN service personnel: For continued protection against risk of fire,
replace
Fl
with
the same type
and
rating offuse only:
.2
A,
250
V.
FEDERAL
COMMUNICATIONS
COMMISSION
RADIO
FREQUENCY
INTERFERENCE
STATEMENT
FCC
ID:
HDC
1202029TL
This equipmenthas been tested
and
found to comply
with
the limits for a Class B digital
device,
pursuant
to
Part
15
ofthe FCC Rules. These limits are designed to provide
reasonable protection againstharmful interference
in
a residential environment. This
equipmentgenerates, uses,
and
canradiate radio frequency energyand, if
not
installed
and
used
in
accordance with theinstructions,
may
causeharmful interference to radio
or
TV
reception, whichcan
be
determined
by
turning the equipmentoff
and
on. The
user
is
encouraged to
try
to correct the interference
by
one ormore of the following
measures:
~~TE
··,·
............
~~-
• Reorient
or
relocate the receiving antenna.
•Increase
the separation
between
the
equipment
and
receiver.
• Connect the
equipment
into
an
outlet
on
a circuit different
from
that
to
which
the receiver is connected.
• Consult
the
dealer
or
an
experienced radio
/TV
technician for
help.
This device is FCC Class B certified only on the RS-232 interface.
The V.35 and RS-530 interfaces are FCC Class B verified.

CANADIAN
EMISSIONS
REQUIREMENTS
This digital
apparatus
does
not
exceed the Class Blimits for radio noise emissions
from digital
apparatus
as set
out
in
the
interference-causing
equipment
standard
entitled "DigitalApparatus," ICES-003 of the
Department
ofCommunications.
Cet appareil
nuerique
respecte les limites
de
bruits
radioelectriques applicables
aux
appareils
numeriques
de
Class Bprescrites
dans
la
norme
sur
le materiel brouilleur:
"Appareils Numeriques," NMB-003 edictee
par
le ministre
des
Communications.
CANADIAN
EQUIPMENT LIMITATIONS
Notice: The
Canadian
Industry
and
Science
Canada
label
identifies
certified
equipment.
This certification
means
that
the
equipment
meets
certain
telecom-
munications
network
protective,
operational,
and
safety
requirements.
The
Department
does
not
guarantee
the
equipment
will
operate
to
the
user's
satisfac-
tion.
Before
installing
this
equipment,
users
should
ensure
that
it
is
permissible
to
be
connected
to
the
facilities
of
the
local
telecommunications
company.
The
equip-
ment
must
also
be
installed
using
an
acceptable
method
of
connection.
In
some
cases,
the
company's
inside
wiring
associated
with
a
single
line
individual
service
may
be
extended
by
means
of a certified
connector
assembly
(telephone
extension
cord).
The
customer
should
be
aware
that
compliance
with
the
above
conditions
may
not
prevent
degradation
of
service
in
some
situations.
Repairs
to
certified
equipment
should
be
made
by
an
authorized
Canadian
maintenance
facility
designated
by
the
supplier.
Any
repairs
or
alterations
made
by
the
user
to
this
equipment,
or
equipment
malfunctions,
may
give
the
telecom-
munications
company
cause
to
request
the
user
to
disconnect
the
equipment.
Users
should
ensure
for
their
own
protection
that
the
electrical
ground
connec-
tions
of
the
power
utility,
telephone
lines
and
internal
metallic
water
pipe
system,
if
present,
are
connected
together.
This
precaution
may
be
particularly
important
in
rural
areas.
Caution:
Users
should
not
attempt
to
make
such
connections
themselves,
but
should
contact
the
appropriate
electric
inspection
authority,
or
an
electrician,
as
appropriate.
The
Load
Number
(LN)
assigned
to
each
terminal
device
denotes
the
percentage
of
the
total
load
to
be
connected
to a
telephone
loop
which
is
used
by
the
device,
to
prevent
overloading.
The
termination
on
a
loop
may
consist
of
any
combina-
tion
of devices
subject
only
to
the
requirement
that
the
total
of
the
Load
Num-
bers
of all
devices
does
not
exceed
100.
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u Table
of
Contents
Chapter
1.
Understanding
ISDN
and
the ISU 128
LJ
ISDN Overview ............................................................................................................... 1
The ADTRAN ISU 128 .................................................................................................... 1
LJ
ISU
128
Interoperability.................................................................................................. 4
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Recommended Operating Protocols............................................................................. 6
Chapter
2.
ISDN
Ordering
Codes (IOCs)
Ordering
ISDN UsingIOCs ........................................................................................... 9
Chapter
3.
Installation
Network
Connection.....................................................................................................
11
DTE Data Connection ...................................................................................................
12
Dial Interface Connection............................................................................................. 12
Maintenance Interface...................................................................................................
13
Chapter
4.
Operation
Menu
Navigation............................................................................................................
15
Getting Started ...............................................................................................................
16
Status Buffer ............................................................................................................
16
VT 100 Terminal
Menu
Support
.................................................................................. 17
Status Screen ........................................................................................................... 17
Configuration Screen ............................................................................................. 18
Chapter
5.
Testing
Test Options ...................................................................................................................
19
Loopback DTE ........................................................................................................
20
Loopback
Network
................................................................................................ 20
Loop
back
Protocol ................................................................................................. 20
Loopback Remote...................................................................................................
21
Loopback Remote
lB
.............................................................................................
21
Loop
back
Remote
2B
.............................................................................................
21
Test Remote .............................................................................................................
21
Loopback Disable ................................................................................................... 22
Near
End
Block
Errors/Far-End
Block Errors (NEBE/FEBE) .........................
22
Software Version .................................................................................................... 23
61202.029L2-1
ISU
128
User
Manual

Table of Contents
Chapter
6.
Configuration
Dial Line Operation....................................................................................................... 25
Switch Protocol ....................................................................................................... 26
Call type................................................................................................................... 26
Speech ............................................................................................................... 27
Audio
................................................................................................................ 27
Data 56
kbps
..................................................................................................... 27
Data 64
kbps
..................................................................................................... 27
TerminalID ............................................................................................................. 27
Setting the SPID............................................................................................... 27
Setting the
LDN
...............................................................................................
28
Dial Options ............................................................................................................
31
Front Panel .......................................................................................................
31
RS-366 ............................................................................................................... 31
AT
commands
.................................................................................................. 32
Using AT
Commands
............................................................................. 34
Using S-Registers .................................................................................... 34
Reading S-Registers ...........-................................................................... 34
Reading S-Register Strings .................................................................... 34
Changing
S-Registers ............................................................................. 34
Changing
S-Register Strings.................................................................. 34
Dialing a Call
using
the AT
Command
Processor ............................. 35
V.25
bis .............................................................................................................. 35
V.25 ASYNC Dialing .........
~
................................................................... 38
V.25 SYNC HDLC Dialing..................................................................... 38
V.25 SYNC BISYNC Dialing.................................................................. 38
V.25 HDLC FLAG ................................................................................... 38
Disabled ............................................................................................................ 38
Auto
Answer
........................................................................................................... 38
Disabled ............................................................................................................ 38
Enabled ............................................................................................................. 39
Dump
All Calls ................................................................................................ 39
Answer
Tone ........................................................................................................... 39
No
Answer
Tone (Default) ............................................................................. 40
Incoming Tone ................................................................................................. 40
Outgoing Tone ................................................................................................. 40
Always Tone .................................................................................................... 40
Connect Timeout .................................................................................................... 40
Call Screening ......................................................................................................... 40
Leased Line Service ....................................................................................................... 42
ii
ISU
128
User
Manual
61202.029L2-l
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Table
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Contents
Clock
mode:
Slave/Master
.................................................................................. 42
Channel
rate
............................................................................................................ 43
DTE
Options
................................................................................................................... 44
Bit Rate ..................................................................................................................... 44
Connector
Type
...................................................................................................... 45
RTS
Options
............................................................................................................ 45
CTS
Options
............................................................................................................ 45
CD
Options
.............................................................................................................. 45
DTR
Options
........................................................................................................... 45
DSR
Options
............................................................................................................ 46
Flow
Control
(Asynchronous
Data
Format)
...................................................... 46
Data
Format
(Asynchronous) ............................................................................... 47
Transmit
Clock (Synchronous
Data
Format)
..................................................... 47
Chapter
7.
Protocol Options
Protocol
Options
............................................................................................................
49
Clear
Channel
......................................................................................................... 50
BONDING
Mode
1.................................................................................................
50
TXINIT .............................................................................................................. 51
TXFA .................................................................................................................
51
TXADDOl .........................................................................................................
52
TXDEQ ..............................................................................................................
52
TANULL ...........................................................................................................
52
TCID..................................................................................................................
52
V.120 .........................................................................................................................
53
V.34 ........................................................................................................................... 53
Error
Control
(Error Ctrl) ............................................................................... 53
Compression
.................................................................................................... 54
Microcom
™
Network
Protocol Block Size (MNPBlk) .............................. 54
DSU 57.6 ASYNC ................................................................................................... 55
T-Link....................................................................................................................... 55
Simple
ADTRAN
Protocol (SAP) ......................................................................... 56
FALLBACK ............................................................................................................. 56
Point-to-Point (PPP) Async-to-Sync .................................................................... 57
Point-to-Point Protocol (PPP) ........................................................................ 58
Multilink
Point-to-Point (MP) ....................................................................... 58
PPP
with
Compression
................................................................................... 59
Chapter
8.
Quick Setup
Quick
Setup
Configuration
..........................................................................................
61
61202.029L2-l
ISU
128
User
Manual
iii

Table
of
Contents
QuickSetup.............................................................................................................
62
Dial 56K sync ...................................................................................................
62
Dial 64K sync ...................................................................................................
63
Dial 112K sync .................................................................................................
63
Dial 128K sync .................................................................................................
64
Dial PPP............................................................................................................ 64
V34 115.2 async................................................................................................
65
Dial 57.6
asyn
...................................................................................................
65
Dial
115.2
asyn
.................................................................................................
66
Fallback 57.6k...................................................................................................
66
More .................................................................................................................. 67
Leased 128k.............................................................................................. 67
Ldm
128 Master....................................................................................... 67
Factory Setup ...........................................................................................
68
Chapter
9.
Dial Options
Dialing Options..............................................................................................................
69
Hang
Up
Line .........................................................................................................
70
Dial
Number
...........................................................................................................
70
Redial Last
Number
...............................................................................................
70
Answer
Call.............................................................................................................
70
Dial Stored
Number
...............................................................................................
70
Store/Review
Number
..........................................................................................
71
Chapter
10. Remote Configuration
Remote Configuration ..................................................................................................
73
Configuring
with
AT
Commands
...............................................................................
73
Configuring
and
Testing
with
the Front Panel
or
VT 100 Terminal ......................
74
Configure Remote
Unit
.................................................................................................
75
Remote Testing ..............................................................................................................
76
Loopback Remote
lB
.............................................................................................
77
LoopbackRemote
2B
.............................................................................................
78
Set
Password
...........................................................................................................
78
Chapter
11.
Troubleshooting
If SelfTest Fails ..............................................................................................................
79
If
the ISU 128 Does
Not
Read Ready ..........................................................................
79
Chapter
12.
Specifications
Specifications
and
Features.......................................................................................... 85
iv
ISU
128
User
Manual
61202.029L2-
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Table
of
Contents
Appendix
A.
AT
Commands
.............................................................................................. 89
Appendix
B.
Current
Status Messages ............................................................................. 95
Appendix
C. Status Buffer Messages................................................................................
99
Appendix
D.
S-Register List............................................................................................. 109
Appendix
E.
Connector Pinouts
RS-232 Interface ...........................................................................................................
119
RS-530 Interface ........................................................................................................... 120
V.35 Interface................................................................................................................
121
RS-366 Interface ........................................................................................................... 122
RJ-45
ISDN IFC ............................................................................................................ 123
Maintenance
Port
.........................................................................................................
123
Acronyms............................................................................................................................. 125
Glossary................................................................................................................................ 127
Index
..................................................................................................................................... 135
List of Tables
Table 1-A
Table
1-B
Table 3-A
Table 7-A
Table E-A
Table
E-B
Table E-C
Table E-D
Table E-E
TableE-F
List of Figures
Figure
1-1
Figure 1-2
Figure 1-3
Figure
4-1
Figure 4-2
Figure 5-1
6 l
202.029L2-
l
DTE Indicators ........................................................................... 4
Recommended
Operating
Modes ........................................... 7
Maximum
DTE Interface Cable Lengths..............................
12
Rate
Adaption
Protocols ......................................................... 57
RS-232 Interface.......................................................................
119
RS-530 Interface...................................................................... 120
V.35
Interface ..........................................................................
121
RS-366 Interface...................................................................... 122
RJ-45
ISDN IFC ...................................................................... 123
Maintenance
Port
................................................................... 123
ISU
128
Rear Panel..................................................................... 2
ISU 128 FrontPanel ................................................................... 3
ISU
128
Interoperability............................................................ 5
VT 100 StatusScreen ............................................................... 17
VT 100 Configuration Screen ................................................. 18
VT 100 Test Screen ...................................................................
19
ISU
128
User
Manual
v

Table
of
Contents
vi
Figure 5-2
Figure 5-3
Figure
6-1
Figure
6-2
Figure 6-3
Figure 6-4
Figure 6-5
Figure 6-6
Figure 6-7
Figure
6-8
Figure
6-9
Figure 6-10
Figure
6-11
Figure 6-12
Figure 6-13
Figure 6-14
Figure 6-15
Figure 6-16
Figure 6-17
Figure 6-18
Figure
7-1
Figure
7-2
Figure
7-3
Figure
7-4
Figure
7-5
Figure
7-6
Figure
8-1
Figure
9-1
Figure 9-2
Figure
10-1
Figure 10-2
Figure 10-3
Figure 10-4
Figure 10-5
Figure 10-6
Figure
E-1
Figure
E-2
Figure E-3
Figure E-4
Figure
E-5
Test
Menu
Tree ......................................................................... 20
Loopback Points....................................................................... 20
Dial Line
Menu
Tree ................................................................ 25
VT 100 Configuration Screen ................................................. 26
Configuration
Menu
Tree ....................................................... 29
Dial Options, RS-366
Menu
Tree ...........................................
31
Dial Options,
V.25
bis
Menu
Tree .......................................... 36
Dial Line,
Auto
Answer
Menu
Tree ...................................... 37
Data Bits
Menu
Tree ................................................................ 37
V.25
bits ASYNC
Menu
Tree................................................... 37
Answer
Tone
Menu
Tree ......................................................... 39
Connect Timeout
Menu
Tree .................................................. 40
Call Screening
Menu
Tree ....................................................... 40
Leased Line
Menu
Tree ........................................................... 42
Limited Distance
Modem
Application ................................. 43
Leased Application
with
Channel Banks ............................. 43
Asynchronous DTE Options
Menu
Tree .............................. 44
Synchronous DTE Options
Menu
Tree ................................. 44
Flow Control
Menu
Tree ......................................................... 46
Data
Format
Menu
Tree .......................................................... 47
Protocol
Menu
Tree.................................................................. 50
BONDING
Mode
1 Protocol
Menu
Tree ..............................
51
V.34
Error Control
Menu
Tree ................................................ 54
V.34
Compression
Menu
Tree ................................................ 54
V.34
MNP
Block Size
Menu
Tree ........................................... 55
PPP
Menu
Tree ......................................................................... 58
QuickSetup
Menu
Tree ..........................................................
61
VT 100 Dial Options Screen....................................................
69
Dial
Menu
Tree .........................................................................
70
Remote Configuration
Menu
Path
........................................
74
Remote Configuration Screen ................................................
74
Remote Unit ConfigurationScreen .......................................
76
Test
Menu
Path
......................................................................... 77
Loopback Remote
lB
............................................................... 77
Set
Password
Screen ................................................................
78
RS-232/RS-530 Interface ....................................................... 120
V.35
Interface ..........................................................................
121
RS-366 Interface......................................................................
122
RJ-45
Interface ........................................................................
123
Maintenance
Port
...................................................................
123
/SU
128
User
Manual
61202.029l2-1A
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Chapter
l
Understanding
ISDN
and
the
ISU
128
ISDN
OVERVIEW
The Integrated Services Digital
Network
(ISDN) is a public or
private switched digital network. ISDN is
an
international
standard
for digital communications, allowing a full
range
of
enhanced
services
supporting
voice, data,
and
image applica-
tions
through
standard
interfaces over a single telephone wire.
ISDN provides a
means
ofintegrating these services
and
mod-
ernizing communication networks for information
movement
and
management
efficiency.
THE
ADTRAN ISU
128
61202.029L2-l
The ADTRAN ISU™ 128 is a stand-alone device
that
connects
data
terminal
equipment
(DTE) to the ISDN
network
or to a
leased digital
network
for
data
transmission. TheISU 128 allows
high-speed
data
transmission
(up
to 128 kbps) over a single
ISDN line. The ISU
128
meets the Microsoft Windows®95 Plug-
an-Play specifications. The file MDMADTN.INF is required.
To
obtain this file contactADTRAN technical support. The
number
is located
on
the inside
back
cover of this manual.
From
the
network, ISDN is delivered
by
a single 2-wire 2B1Q
U-interface
which
is connected directly to the ISU 128. ISDN
network
termination is designed into the ISU 128, eliminating
the
need
and
expense ofa separate
NTl.
For
network
testing,
the ISU 128
responds
to
NTl
test
commands
from the telephone
company
central office (CO).
ISU
128
User
Manual
1

Chapter
1.
Understanding ISDN and
the
ISU
128
JSDN
JFC
110!911
2
The ISU 128 transmits
data
over
an
RS-530,
V.35
interface, or
RS-
232 interface, selectable
on
the front panel. The ISU 128 per-
forms
at
synchronous
data
transfer rates of2400
bps
to 128 kbps
and
asynchronous rates of 300
bps
to 115.2 kbps. For
speeds
over 64 kbps,
the
industry
standard
BONDING or MULTILINK
PPPprotocol aggregates the
two
64
kbps
B
channels for a
maximum
of 128 kbps. The ISU 128 is
intended
to
support
the
transfer of
data
and
images
over
ISDN. The ISU 128
may
be
viewed
as
an
ISDN
dial
modem
that
allows cost-effective high-
speed
data
transmission
at
rates
up
to 128 kbps.
The ISU 128
has
one
RJ-45
jack available
on
the rear
panel
for
network
connection (See Figure 1-1). The
RJ-45
jack labelled
ISON
IFC
is for ISDN Basic Rate. ISDN Basic Rate service
divides a
standard
telephoneline into three digital channels
capable ofsimultaneous voice
and
data
transmission. The three
channels are comprised of
two
bearer
(B)
channels
at
64 kbps
and
one
data
(D) channel
at
16
kbps
(2B+D).
The ISU 128 also
supports
a leased digital connection
that
allows
data
to
be
transferred
at
up
to 128
kbps
over a 2-wire facility
using
the U-interface jacklabelled
ISON
IFC.
This type of
service is a
permanent
connection
between
end
points
and
is
sometimes referred to as a leased connection, a dedicated
connection, a
nailed-up
connection, a private circuit, or a limited
distance
modem
connection. These types ofservice are referred
to
in
this
manual
as Leased Line Service.
RS366
I
MAINTENANCE
V.35
0 °:::::::::::: 0
RS530/
232
ISU
128
User
Manual
Figure
1-1
ISU
128
Rear
Panel
.
61202.029l2-1
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61202.029l2-1
Chapter
1.
Understanding ISDN and the
ISU
128
Dialing from
the
ISU 128 is accomplished
in
a variety ofways:
• From the front
panel
•
From
up
to
ten
stored
numbers
•
Through
an
RS-366 dial
port
used
in
facsimile
and
video
conferencing applications
• Over the DTE interface
using
theAT
command
set
• With
V.25
bis in-band dialing (used
in
applications such
as
LAN
/WAN
bridging)
•With
DTR asserted, some
bridges/routers
raise DTR
when
bandwidth
on
their dedicated line is exceeded.
In
high-traffic
times, this allows the ISU 128 to dial
out
over the ISDN for
an
extra 128
kbps
of
bandwidth-on-demand.
The ISU 128 front
panel
accommodates a 2-line,
16
character
LCD display. SevenLED indicators monitor
data
flow
and
display the status of
key
DTE interface leads as described
in
Table 1-A. A front
panel
keypad
supports
configuration, test
modes, test status,
and
dialing (see Figure 1-2).
-.
ISU
128
I
ENTER
I
CD
m m
~
[TI
CD
ITl
~
[LJ
LIJ
[i]
I~
cs
TD
RD
CD
TR
~I
D D D D D
!CANCEL!
[LI
[!]
OD
Figure
1-2
ISU
128
Front
Panel
ISU
128
User
Manual
3

Chapter
1.
Understanding ISDN and
the
ISU
128
Indicator
cs
ID
RD
Q)
TR
SR
Definition
Table
1-A
DTE
Indicators
Request to Send. Indicates the DTE
is
ready to transmit.
Clear to Send. Indicates the
ISU
128
is
ready to transmit.
Transmit Data. On when the
DTE
is
transmitting to the ISU 128.
Receive Data. On when the ISU 128 is
receiving data from the far end.
Carrier Detect.
On
when the ISU 128 i
connected to a remote unit.
Data Terminal Ready from DTE. On
wh
DTR is active at DTE interface.
Data Set
Ready.
ISU
128
INTEROPERABILITY
4
Telephone networks are evolvingfrom analog technologies to
digital technologies
such
as ISDN. This transitionis time-
consuming
and
costly for the telephone companies.
Upgrading
all locations
and
facilities is a lengthyprocess.
The ISU 128 bridges this transition
by
supporting
communica-
tions
with
existing
and
future
network
services
and
equipment.
TheISU 128
supports
communications
with
Switched 56 service,
Switched 56 DSUs (2-wire
and
4-wire), various ISDN terminal
adapters,ISDN terminal equipment, BONDING compatible
inverse multiplexers,
and
analog
modems
with
the
optional
V.34
modem
(part
number
1202029L3).
Figure 1-3 illustrates the ISU 128 operation
in
various switched
network
services
and
customer premises products.
ISU
128
User
Manual
61202.029l2·1
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:::::
~:::::::
ISU 128
DTE
ISDN U-lnterface
DTE
2-Wire
SW56DSU
NETWORK ISDN
orSW56
4-Wire
BONDING Compatible
Inverse MUX Video Codec
SW56
DSU
12!1'fi!E'l
;;;;;;;;;;;;;
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Figure
1-3
ISU
128
Interoperability
()
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Chapter 1. Understanding
ISDN
and
the
ISU
128
RECOMMENDED
OPERATING
PROTOCOLS
6
The ISU 128
supports
a
wide
range
ofoperating modes.
Many
combinations ofcircuit type, protocol,
and
data
rate
may
be
selected. However, only the combinations
shown
in
Table
1-B
are recommended. As
noted
in
Table
1-B,
all asynchronous rates
will
support
flow control. Flow control is required
when
operat-
ing
at
115,200
bps
using
PPP (Point-to-Point Protocol),
V.120,
or
SAP (Simple
Adtran
Protocol).
Table
1-B
shows
that
a given
data
rate
may
be
achieved
by
more
than
one
protocol/
rate
adaption
selection. The table is orga-
nized
so
that
selections
with
the least
transport
delay are closer
to
the
top
of the table for
any
given circuit type. Therefore, users
should
choose a protocol
and
rate closer to the
top
of the proto-
col rate listfor a given circuit type.
ISU
128
User
Manual
61202.029L2-1
..
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Call Type
DIAL-64K
DIAL-56K
DIAL-64K*2
DIAL-56K*2
DIAL AUDIOt
LEASED 64K
LEASED 128K
~QTE
Protocol
BONDING
Clear Chan
V.120
Tlink
SAP
PPP async-sync
BONDING
V.120
Tlink
SAP
BONDING
Clear
Chan
V.120
TLINK
PPP async-sync
BONDING
DSU
57.6
V.120
Tlink
BONDING
BONDING
BONDING
BONDING
V.34
Clear
Chan
SAP
DSU
57.6
SAP
Clear Chan
SAP
1.
2.
'·,:%-~,.
3.
4.
5.
t
61202.029L2-1
Sync/
Asvnc
Sync 56000
Sync
48000
Sync
9600
Sync
2400
Svnc
38400
Async 1200
Async
2400
Async
1200
Async 1200
Asvnc
38400
Sync 56000
Sync
48000
Sync
9600
Svnc
2400
Async
1200
Async
2400
Async
57600
Async
1200
Asvnc
1200
Sync
128000
Asvnc
115200
Sync
112000
Asvnc
115200
Asvnc
300
Sync
48000
Svnc
2400
Async
57600
Asvnc
1200
Sync
128000
Asvnc 57600{
Chapter
1.
Understanding ISDN and
the
ISU
128
Rates
64000
56000
64000
19200
38400
4800
9600
2400
4800
4800
9600
2400
4800
2400
4800
57600
115200(
56000
19200
38400
4800
9600
2400
4800
4800
9600
2400
4800
2400
4800
1200
2400
56000
64000
4800
9600
2400
4800
115200{
Table
1-B
Recommended
Operating
Modes
Supported (bps)
48000
19200
56000
64000
9600
19200
38400
57600
115200/
19200
38400
57600
9600
19200
38400
57600
115200/
9600
19200
48000
19200
56000
9600
19200
38400
57600
115200/
19200
38400
57600
9600
19200
38400
57600
115200/
9600
19200
4800
9600
19200f
28800
19200
38400
9600
19200
38400
57600( 115200{
All
asynchronous
rates
supportflow
control.
All
dial-up
modes
supportfront
panel,
DTR, RS-366,
AT
command,
and
V.25
bis
dialing
methods.
Rates
marked
with
f
require
flow
control.
Given
a
choice
between
two
protocols,
pick
the
protocol
closer
to
the
top
of
the
list.
Multilink
PPP
supports
the
same
rates
as
single-link
PPP
async-sync.
Use
the
recommended
rates
for
PPP
async-sync.
Available
only with ISU
128
V.34
modem
option,
part
number
1202029L3.
ISU
128
User
Manual
7

Chapter
1.
Understanding ISDN and the
ISU
128
..
'
l
....
....
8
ISU
128
User
Manual
61202.029L2·
1