6.2.2.3. Special Requirements for Serbia and Montenegro. Silicon Laboratories Si2493, Si2404, Si2415, Si2434, Si2494, Si2439, Si2457, Si2443

A N 9 3

Register

U37–U40

U42

U43

U45

U46

U47

U48

Table 106. Dial Registers

Value Function

Pulse Dial Control

Pulse per Digit Definition

PDBT Pulse Dial Break Time

PDMT Pulse Dial Make Time

PDIT Pulse Dial Interdigit Time

DTMF Control

DTPL DTMF Power Level (and

Twist)

DTNT DTMF On Time

DTFT DTMF Off Time

Table 107. Line Interface/Control Registers

Register Bit Value Function

U4D 10 CLPD Check Loop Current Before

Dialing

1

0

LLC Low Loop Current Detect

(set for legacy TBR21)

LCN Loop Current Needed

U50

U51

LCDN Loop Current Debounce

On Time

LCDF Loop Current Debounce

Off Time

U52

U67:

13:12

MINI

9 ILIM

U68 2

1

0

7

6

XMTL Transmit Level

DCR DC Impedance Select

OHS On-Hook Speed

3:2 DCV DC Termination Select

1

0

RZ

RT

Ringer Impedance

Ringer Threshold Select

BTE

ROV

BTD

Billing Tone Protect Enable

Receive Overload

Billing Tone Detected

6.2.2.3. Special Requirements for Serbia and Montenegro

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The following are special network requirements for Serbia and Montenegro. These specifications are based on the best information available and are believed to be correct.

DC Feed: 48 or 60 V

Feeding Bridge: 2 x 400

 or 2 x 500 

Network Impedance: 600

resistive

On-Hook (Idle State) Noise: < –60 dBm

On-Hook ac (Ringer) impedance: >2.5 k



DTMF Transmit: –11 to –9 dBm and –8 to –6 dBm

Data Transmit Level: 0 dBm to –15 dBm in 1 dB steps (average –13 dBmo)

158 Rev. 1.41