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Adtran
Enterprise Network Series
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HDLC
ATLAS 800PLUS/810PLUS MODULE
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Certain ATLAS 800PLUS/810PLUS
applications require a large number of High-level Data Link Control (HDLC) controllers. The
HDLC Module contains 128 HDLC controllers and is used when the application
requirements call for more HDLC controllers than are provided with the other
ATLAS 800PLUS hardware components.
The application determines whether an HDLC Module is necessary. An HDLC
controller is required to process any of the following:
- An ISDN D channel. One HDLC controller is required for every D channel
that ATLAS 800PLUS handles--whether PRI or BRI.
- An ISDN B channel--but only if the call is processed by ATLAS 800PLUS,
as in the case of remote access applications. For remote access
applications, one HDLC controller is required for every B channel call that
is terminated by ATLAS 800PLUS. When ATLAS 800PLUS
does not terminate the ISDN calls (for example, a PRI-to-T1 conversion),
HDLC controllers are not needed for the B channels, just for the D channel.
Note: ISDN calls that are directed to synchronous V.35 ports at 56 or 64
kbps do not require HDLC processing of the B channels.
- A Frame Relay link. Every Frame Relay link in an ATLAS 800PLUS
system requires one HDLC controller. For example, a single T1 connection to
the public Frame Relay network requires one HDLC controller. In a private
Frame Relay network, each DS0 in a T1 may represent a Frame Relay link to a
particular remote site, in which case twenty-four HDLC controllers would be
required. Note: Frame Relay links can be found on the DTE interface as well
as the network interface. If ATLAS 800PLUS is passing
Frame Relay out individual V.35 ports, then each of these V.35 ports is
counted as a Frame Relay link and requires an HDLC controller.
- A Dedicated PPP link. One HDLC controller is required for every dedicated
PPP link that is terminated into the integral router. For example, an HDLC
controller would be required for each individual point to point T1 link that
has a router at the remote site talking PPP. All PPP links coming into the
ATLAS 800PLUS/810PLUS must terminate on
the integral router.
HDLC controllers are implemented in the HDLC module and in other ATLAS 800PLUS
components, as indicated in Table 1.
Features
- 128 HDLC controllers
- 8.192 Mbps total bandwidth
- Used in private Frame Relay and other applications
- Flash upgradeable
- Occupies a single slot in the ATLAS 800PLUS/810PLUS
chassis
- Hot swappable
- Standard 5-year warranty
HDLC APPLICATION EXAMPLE
Table 1
| Component |
# HDLC Controllers |
Usage |
| ATLAS 800 Base Unit |
2 |
Two HDLC controllers are tied to the T1/PRI interfaces built into the
base unit, and can be used to process D-channels (in case the port is
configured as a PRI). |
| ATLAS 800PLUS/810PLUS
Base Unit |
4 |
Two HDLC controllers are tied to the T1/PRI interfaces built into the
base unit, and can be used to process Frame Relay links, dedicated PPP
links or process D-channels (in case the port is configured as a PRI).
The other two HDLC controllers are general purpose and can be used to
process Frame Relay links, dedicated PPP links, D channels, or B
channels as required. |
| Quad T1/PRI Module |
4 |
Each HDLC controller is tied to a specific T1/PRI port on the module,
and can only be used to process the D-channel (in case the port is
configured as a PRI). If a T1 port on the Quad T1/PRI module is
configured as a Frame Relay link, an HDLC controller from some other
ATLAS 800PLUS hardware must be used.
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| Octal BRI Module |
8 |
These HDLC controllers can only be used to process the D channel of
the associated BRI interface |
| Modem-16 Module |
16 |
These HDLC controllers can only be used to process ISDN B channels for
remote access. |
| HDLC Module |
128 |
The HDLC controllers on this modules are general purpose and can be
used to process Frame Relay links, ISDN B channels, and ISDN D channels
as the system requires. The total bandwidth directed to the HDLC module
can not exceed 8.192 Mbps. |
Product Specifications
CAPACITY
HDLC Controllers
Total Bandwidth
AGENCY APPROVALS
- FCC Part 15, Class A
- UL 1950 and Canadian UL CUL
ENVIRONMENT
- Operating Temperature: 0° to 45°C (32° to 113°F)
- Storage Temperature: -20° to 70°C (-4° to 158°F)
- Relative Humidity: Up to 95%, non-condensing
POWER
PRODUCT INCLUDES
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE.
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Ordering Information
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