txc-03108 TranSwitch Corporation, txc-03108 Datasheet - Page 4

• Manufacturer Part Number: txc-03108
• Description: 8-channel Framer
• Manufacturer: TranSwitch Corporation

Ed. 2, May 2001
T1Fx8
TXC-03108
TXC-03108-MA
The framer provides a microprocessor interface that is compatible with either Motorola or Intel processors. It is
designed to act as an 8-bit peripheral using asynchronous bus transfers. Polling or interrupt support and
latching of critical events are provided to accelerate interrupt processing and reduce the burden on the
attached microprocessor. Individual alarm masks are available to ignore certain alarms or to operate different
channels in different modes. Direct access to the slip buffers is provided for DS0 and the signaling RAMs,
which makes sending special signaling or DS0 codes possible with low overhead. Scanning for signaling is
facilitated with signaling debounce and interrupt on signaling change of state.
The framer supports a wide variety of individual and multiplexed system interface options to permit seamless
interfacing to many types of DS0-based devices. Both MVIP and HMVIP/H.100 interfaces are provided for
operation with many different system buses and devices. For maintenance support the T1Fx8 incorporates a
per T1 PRBS code word generator/analyzer that provides 2
32-bit code word. In addition, a per T1 time slot loopback activate and deactivate function compatible with the
E1Fx8 and ANSI T1.231 Fractional T1 Loopback are provided. Error forcing and diagnostic access are also
provided.
Although many advanced features are included, the device is optimized for the multichannel application. Sys-
tem I/O is minimized, and peripheral functions requiring significant logic or I/O have been reduced or elimi-
nated. This device is well suited to systems requiring many T1 interfaces where real estate is at a premium and
power consumption is important.
Proprietary TranSwitch Corporation Information for use Solely by its Customers
TECHNICAL OVERVIEW
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15
-1 and QRSS (2
20
-1) codes plus a programmable