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DEFINITY Made Easy Tools
Issue 2, November 2000
DEFINITY Hardware
TN464C/D/E/F/GP
All TN464 circuit packs provide:
- Board-level, administrable A-Law or µ-Law companding
- CRC-4 generation and checking (E1 only)
- Stratum 3 clock capability
- ISDN-PRI T1 or E1 connectivity
- Line-out (LO) and line-in (LI) signal leads (unpolarized, balanced pairs).
- Support for CO, TIE, DID, and off-premises station (OPS) port types that use robbed-bit signaling protocol, proprietary bit-oriented signaling (BOS) 24th channel signaling protocol, or DMI-BOS 24th channel signaling protocol
- Support for Russian incoming ANI (R7 or later)
The TN778 packet-control circuit pack and the TN765 processor interface (R7 or later si) or TN1655 packet interface (R7 or later r) handle D-channel signaling for the TN464.
TN464C and later circuit packs can be used as universal, digital, signal level-1 boards in wideband ISDN-PRI applications.
TN464E and later circuit packs provide test-jack access to the DS1 or E1 line and support the 120A Integrated Channel Service Unit (CSU) module.
TN464F (US and Canada Offer A Only) circuit packs use the enhanced maintenance capabilities of the integrated channel service unit (ICSU). These circuit packs can communicate with CONVERSANT ®. See TN2185B.
TN464GP Firmware Download Target with Echo Cancellation circuit pack is the new Universal DS-1 (UDS1) circuit pack available for all DEFINITY platforms with Release 9. It replaces the TN464F for new R9 systems being shipped. The TN464GP is essentially the same as the TN464F UDS1 circuit pack except that it has echo cancellation circuitry and firmware download capability. To enable the echo cancellation capability, the customer must purchase an Echo Cancellation Software Right-to-Use feature in addition to the hardware.
The echo cancellation capability of the TN464GP is selectable per channel. The TN464GP automatically turns off echo cancellation when it detects a 2100-Hz phase-reversed tone put out by high-speed modems (56 Kbaud), but not when it detects a 2100-Hz straight tone generated by low-speed modems (9.6 Kbaud). Echo cancellation improves a low-speed data call.
The TN464GP is intended for DEFINITY customers who are likely to encounter echo over circuits connected to the public network. The occurrence of echo is likely if the DEFINITY is configured for ATM, IP, or other complex services and interfaces to local service providers who do not routinely install echo cancellation equipment in all their circuits. A common source of echo is "hybrid" circuits, where conversions between 2-wire analog and 4-wire digital circuits take place. The TN464GP cancels echo with delays of up to 96 ms.
The TN464GP can be updated using the firmware download feature, which requires use of the TN799C C-LAN interface.
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| Copyright� 2000 Avaya Inc |
| Send comments to MadeEasy Development Team |
| Always check at the Made Easy Web site for the most current information. |