Enterasys Networks XSR-3020 - Manual (Page 106)

Cable, CompactFlash and Accessory Specifications
A-20
T1/E1 Drop & Insert (D&I) NIM
The XSR’s 2-port T1/E1 D&I NIM card, as shown in Figure A-25 , is designed as an intermediary
between the Central Office T1/E1 line and a PBX. It de-couples Channel Associated Signaling
(CAS) and Voice DS0 timeslots and redirects them to a PBX, and conversely, reintegrates Voice DS0
timeslots from the PBX with the T1/E1 data stream. Both ports are functionally equivalent.
Figure A-25 T1/E1 D&I NIM Card
The T1/E1 D&I NIM provides long- and short-haul capabilities and Drop and Insert functionality
via a fully configurable Time Division Multiplexed (TDM) switch. It can be configured for data
only, or voice/data applications. In Data-Only mode, both ports pass data, whereas in Voice/Data
mode, one port passes a voice/data stream, while the other passes only voice.
The T1/E1 D&I NIM maintains high reliability of voice traffic by using a bypass relay to ensure
continued service even if a power failure occurs or the NIM enters an abnormal state. In such an
event, the two ports are connected, bypassing the NIM, thus allowing uninterrupted bidirectional
voice transmission. To ensure service, remember to configure voice timeslots on both sides of the
connection in the same manner. That is, if timeslots 3-5 are configured for voice on the NIM, the
same DS0s should be configured for voice at the Central Office. Refer to the XSR User’s Guide for
instructions.
Refer to Figure A-26 for pinout assignments.
Figure A-26 T1/E1 D&I NIM Pinouts
Regulatory/Safety Compliance
The T1/E1 D&I NIM complies with the following regulatory requirements: PCI Local Bus
Specification Rev 2.1, IEEE P1386 Draft 2.4, IEEE P1386.1 Draft 2.4, ANSI T1.403, ITU-T G.703,
G.704, G.706, G.736, G.775, G.823, I.431, Q.703, AT&T TR62411, TR54016, ETSI ETS 300233, and
IEEE 1149.1.
The T1/E1 D&I NIM also complies with the following safety requirements: FCC Part 68, CS03,
FCC Class B, TBR12, 13, 14, GR-1089, ITU K17-K20, IEC 61000-4-2, IEC 61000-4-5, UL1950, IEC 950,
and EN 60950.
T1/E1 D&I
Pin Signal
1 Unused
2 Unused
3 Unused
4 Signal (Tip)
5 Signal (Ring)
6 Unused
7 Unused
8 Unused
Pin 1 Pin 8