Programming Support; Networks - IBM 3742 Reference Manual

PROGRAMMING SUPPORT
Teleprocessing programming support will be provided for
the 3741 Model 2 by the following access methods and
operating systems:
System/370
DOS/VS BTAM
OS/VS1 BTAM
OS/VS2 BTAM
OS/VS1 TCAM (level 4)
OS/VS2 TCAM (level 4)
System/3 Disk Systems
RPG II
In addition to this programming support, the 3741 Model 2
can communicate with either a 3747 with BSCA or another
3747 Model 2.
The 3741 Model 2 is transparent to the teleprocessing
support which exists in System/360-370 DOS BT AM and
System/360-370 OS BTAM and TeAM. The 3741 Model 2
is transparent through the device classes of BSC1 and
BSC2 in the previously listed access methods.
Because of this capability, the following support is
provided:
System/370
DOSBTAM
OS BTAM
OS TeAM (level 5)
System/360
DOSBTAM
OSBTAM
OS TeAM (level 5)
Point-to-Point Nonswitched Network
3741
Model 2
Point-to-Point Switched Network
3741
Model 2
Modem
Modem
Figure 24. Point-to-Point Telecommunications Networks
Communications with System/360-370 can be via an:
• IBM 2710 Data Adapter Unit
• IBM 2703 Transmission Control Unit
• IBM 3705 Communications Controller
In addition, communication with System/370 can take
place via an Integrated Communications Adapter (lCA).
In BTAM and TCAM, the terminal designation is BSC1 or
BSC2 depending on whether a nonswitched or switched
facility is being used. In System/3 RPG II, the terminal
designation is BSCA on the file description specification
and is blank in the remote device field of the telecommuni-
cations specifications.
The 3741 Model 2 is supported as a standard BSC terminal
for point-to-point communications on switched or non-
switched facilities. Operation is half-duplex, synchronous,
serial-by-bit, serial-by-character. The BSC allows data
transmission using EBCDIC directly as the communications
line code.
Networks
The 3741 can use a switched or nonswitched" network for
point-to-point communication. See Figure 24.
~
~
Modem
Modem
Modem
Modem
3741 Model 2
3747 or CPU
3741 Model 2
3747 or CPU
3741 Model 2
3747 or CPU
3741 Model 2
3747 or CPU
Communications 45