Hardware Description and Reference for Avaya ... - Avaya Support

Circuit packs, channel service units, and power supplies
TN763D auxiliary trunk (4 ports)
The TN763 auxiliary trunk has four ports. Each port has the following signal leads:
● T
● R
● SZ
● SZ1
● S
● S
The TN763D circuit pack is used to access on-premises applications such as music on hold,
loudspeaker paging, code calling, and recorded telephone dictation. The TN763 circuit pack
supports external recorded announcement equipment, and is administrable to select A- or
µ-Law companding.
TN767E DS1 interface, T1 (24 channels)
Note:
Note: This circuit pack is not used in a G650 Media Gateway.
The TN767 DS1 interface circuit pack provides a DSX1-level physical interface to the DS1
facility. The TN767 circuit pack has unpolarized line out (LO) and line in (LI) signal lead pairs.
The TN767 circuit pack supports DS1 rate digital facility connectivity. The circuit pack supports
CO, Tie, DID, and off-premises stations (OPS) port types. These port types use the robbed-bit
signaling protocol. On DEFINITY CSI and SI Media Servers, this circuit pack supports
ISDN-PRI connectivity. For these applications, the signaling D-channel can connect from the
TN767 circuit pack to the processor interface by a permanent switched call over the TDM bus.
On S8500 and S8700-series Media Servers, this circuit pack does not directly support
D-channel signaling and thus does not directly support ISDN-PRI connectivity. However, the
TN767 circuit can indirectly support D-channel signaling provided that the central office
supports nonfacility associated signaling (NFAS). In this case, you use NFAS administration on
the server. This administration associates the D-channel of another T1/E1 circuit pack, usually a
TN464, with the TN767 circuit pack.
The TN767 circuit pack communicates with Avaya IVR. The TN767 also provides the enhanced
maintenance capabilities of the 120A channel-service unit (CSU) and the enhanced integrated
channel-service unit (ICSU).
234 Hardware Description and Reference for Avaya Communication Manager