Thông tin nhanh về sản phẩm
- Mã hàng: L60-PRHB8
- Card PRHB8 trung kế E1/PRI và 8 máy nhánh số LG-Ericsson ipLDK-60
- Hỗ trợ chức năng hiển thị số gọi đến
- Xuất xứ: Thailan
- Bảo hành: Chính hãng 12 tháng
- Giao hàng: Miễn phí
The PRI and 8 Hybrid interface Board(PRHB8) is based on the existing interface described in ITU-T Recommendations G.704, G.703 and G.823.
It covers CEPT frame format which consist of 32, 8bit timeslots, data rate at 2.048MHz. Of the 32 timeslots in a frame, 30 timeslots are defined as information channels, timeslots 1-15 and 17-31 which correspond to telephone channels 1-30.
The frame has a duration of 125usec and contains 32 time slots (TSs) of 8 slots. TS 0 is allocated to frame alignment sync. And TS 16 is allocated to the signaling channel, the other TSs are available for allocation to the B channel.
CEPT frame has four signaling bits, A, B, C and D. Signaling bits for all 30 information channels are transmitted in timeslot 16 of frames 1-15. The PRHB8 supports pulse dialing, DTMF dialing, and MFC-R2 register signaling (based on ITU-T Recommendation Q.440-480).
Data & bit clock are transmitted by the NT master and extracted by TE slave. The ipLDK-60 system will be positioned as TE slave. The PLL circuitry on the PRHB8 extracts the reference clock from the bit stream and generates the system main clock (32.768MHz) which is synchronized with digital trunk line.
Operating Environment |
Temperature |
0 (oC) – 40 (oC) |
Humidity |
0 - 80% (non-condensing) |