Data Channels and Switching Configuration
NetRunner W
AN User’s Manual
5-3
Sync Channel Protocol Menu
When you configure a port for sync (page 51), the following protocol options
will display:
Option
Description
1. DLC
For SDLC and HDLC.
2. ASCII Bisync
Use with the following considerations: a 7-bit ASCII code with
parity, with either one or two bytes longitudinal redundancy
check (LRC) or a block check character (BCC), and a minimum
of two pad characters following each transmission having the
value of ’FF’ (hexadecimal).
3. EBCDIC Bisync Use with IBM 3270, 2780 and 3780 protocols.
4. H-P Sync
Host-to-host sync data transfer which runs a modified form of
ASCII Bisync.
5. RTS/CTS
For half-duplex customized or
non-standard
control sequences.
Data is passed through the system according to MICOM propri-
etary algorithms. Transmission is independent of the line proto-
col and may be used with any sync protocol.
6. Sync-Pad
For customized or
non-standard
control sequences. It can run
full or half duplex. You configure the value and number of pad
characters for the end of block and the unit interprets it as
such.
7. MICOM DLC
For use when the unit is cascading with MICOM muxes. All
external multiplexers must have all ports configured for asynch-
ronous channels.
8. MICOM Voice
Select when an external Advanced Packetized Voice digitizer
with DLC protocol (APV1/DLC) is to be used. This protocol is a
modified DLC protocol with block size set to 1024 bytes and a
default data rate of 9600 bps.
9. Fast Packet
Protocol insensitive (transparent) and compresses sync data.
Utilizes statistical multiplexing techniques across the composite
link such as other sync protocols (such as DLC and BISYNC).
If the use of the equipment is at maximum, you may wish to
select the TDM option, which reserves bandwidth.
10. TDM
Protocol insensitive. Designed for priority devices which re
quire reserved bandwidth across the composite link (dedicated
bandwidth).
Note: Tail circuits are supported at rates up to 38.4 Kbps when one
side is set for internal clocking and the other side is set for
external clocking. Do not configure a higher data rate.
Notes:
D
Once you have completed your selection from the menu, you must do a
node reset selecting the
current configuration
option. You may configure all
sync ports before performing a reset.
D
If you change protocols, be sure to configure both ends of the channel with
the same protocol. Perform a node reset on both units. (When changing
protocol, the channel cannot be connected
.)