MT8931CC datasheet(10/40 Pages) MITEL

Part #	MT8931CC

Description	CMOS ST-BUS??FAMILY Subscriber Network Interface Circuit Preliminary Information

Download	40 Pages

Scroll/Zoom	100%

Manufacturer	MITEL [Mitel Networks Corporation]

Direct Link	http://www.mitel.com

Logo

10 / 40 page

MT8931C

9-80

After successfully completing a transmission, the

internal priority level is reduced from high to low.

The internal priority will only be increased once the

terminal count for the respective level of priority has

been achieved.

(e.g., if TE has high priority

internally and externally, it must count 8 consecutive

ones in the D-echo channel. Once this is achieved

and successful transmission has been completed,

the internal priority is reduced to a lower level (i.e.,

count = 9). This terminal will not return to the high

internal priority until 9 consecutive ones have been

monitored on the D-echo channel).

Line Wiring Conﬁguration

The MT8931C can interface to any of the three

wiring conﬁgurations which are speciﬁed by the

CCITT

Recommendation

I.430 and ANSI T1.605

(refer to

Figures 8

to 10).

These

consist of a

point-to-point or one of the two point-to- multipoint

conﬁgurations

(i.e.,

short

passive

bus

or

the

extended passive bus).

The selection of line

conﬁgurations is performed using the timing bit (B4

of NT Mode Control Register).

For the short passive bus, TE devices are connected

at random points along the cable. However, for the

extended passive bus all connection points are

grouped at the far end of the cable from the NT.

For an NT SNIC in ﬁxed timing mode, the VCO and

Rx ﬁlters/peak detectors are disabled and the

threshold voltage is ﬁxed. However, for a TE SNIC or

an NT SNIC (in adaptive timing mode), the VCO and

Rx ﬁlters/peak detectors are enabled.

In this

manner, the device can compensate for variable

round trip delays and line attenuation using a

threshold voltage set to a ﬁxed percentage of the

pulse peak amplitude.

Another operation can be implemented using the

SNIC in the star conﬁguration as shown in Figure 14.

This mode allows multiple NTs, with physically

independent S-Busses, to share a common input

source and transfer information down the S-Bus to all

TEs .

All NT devices connected into the star will

receive the information transmitted by all TEs on all

branches of the star, exactly as if they were on the

same

physical

S-Bus.

All

NTs

in

the

star

conﬁguration must be operating in ﬁxed timing mode.

Refer to the description of the star conﬁguration in

the ST-BUS section.

The SNIC has one last mode of operation called the

NT slave mode.

This has the effect of operating the

SNIC in network termination mode (XTAL1/NT pin =

1) but having the frame structure and registers

description deﬁned by the TE mode.

This can be

used where multiple subscriber loops must carry a

ﬁxed phase relation between each line.

A typical

Figure 11 - ST-BUS Stream Format

Figure 12 - Clock & Frame Alignment for ST-BUS Streams

Channel

0

Channel

1

Channel

2

Channel

30

Channel

31

Channel

0

•••

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

(8/2048) ms

125

µs

F0b

C4b

ST-BUS

BIT CELLS

Channel 31

Bit 0

Channel 0

Bit 7

Channel 0

Bit 6

Channel 0

Bit 5

Channel 0

Bit 4

Similar Part No. - MT8931CC

Manufacturer	Part #	Datasheet	Description
Zarlink Semiconductor I...	MT8931C	833Kb / 39P	Subscriber Network Interface Circuit
	MT8931CE	833Kb / 39P	Subscriber Network Interface Circuit
	MT8931CP	833Kb / 39P	Subscriber Network Interface Circuit

More results

Similar Description - MT8931CC

Manufacturer	Part #	Datasheet	Description
Mitel Networks Corporat...	MT8930C	683Kb / 36P	CMOS ST-BUS??FAMILY Subscriber Network Interface Circuit Preliminary Information
	MT8930C-1	323Kb / 42P	CMOS ST-BUS??FAMILY Subscriber Network Interface Circuit
	MT8971B	390Kb / 20P	ISO2-CMOS ST-BUS??FAMILY Digital Subscriber Interface Circuit Digital Network Interface Circuit
	MT9171	393Kb / 22P	ISO2-CMOS ST-BUS??FAMILY Digital Subscriber Interface Circuit Digital Network Interface Circuit
	MT8910-1	419Kb / 26P	CMOS ST-BUS??FAMILY Digital Subscriber Line Interface Circuit
	MH88612C	66Kb / 8P	Subscriber Line Interface Circuit Preliminary Information
	MH88612K	72Kb / 8P	Subscriber Line Interface Circuit Preliminary Information
	MH89760B	846Kb / 38P	ST-BUS??FAMILY T1/ESF Framer & Interface Preliminary Information
	MH88612	64Kb / 8P	Subscriber Line Interface Circuit (SLIC) Preliminary Information
	MH88510	130Kb / 10P	Subscriber Line Interface Circuit (SLIC) Preliminary Information

More results

MT8931CC Datasheet(PDF) 10 Page - Mitel Networks Corporation

MT8931CC Datasheet(HTML) 10 Page - Mitel Networks Corporation

Similar Part No. - MT8931CC

Similar Description - MT8931CC

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

Datasheet Download

Link URL