(Page 18 of 19 in this chapter) Version

TxVpdT1E1Cfg

Description:

This function issues a T1/E1 configuration request for a single line (the request must be issued independently for each T1/E1). The command configures the overall behavior of the line. Note: Certain literals in the following list pertain only to T1 or E1.

Prototype:

short TxVpdT1E1Cfg (TX_HANDLE handle,
unsigned char network,
unsigned char framemode,
unsigned char encoding,
unsigned char linebldout,
unsigned char robbedbit,
unsigned char loopmaster );
handle TX_HANDLE returned from TxVpdOpen.
network Network T1/E1 indicator (which line provides network connection):
NET_T1A
NET_T1B
framemode Framing mode. Valid modes include:
FRAMING_NONE Do not configure T1/E1 interface (a NOOP request).
FRAMING_D4 D4 (193S) Framing (T1).
FRAMING_ESF Extended Superframe Format (T1).
FRAMING_CCS Common Channel Signaling (E1).
FRAMING_CAS Channel Associated Signaling (E1).
FRAMING_CCSCRC4 CCS with CRC4 (E1).
FRAMING_CASCRC4 CAS with CRC4 (E1).
encoding Type of encoding on line. Valid types include:
ENCODING_NONE No encoding.
ENCODING_NOZCS AMI encoding with no Zero suppression.
ENCODING_BIT7_ZCS Bit 7 Stuffing (T1).
ENCODING_B8ZS Bipolar Eight Zero Substitution (T1).
ENCODING_HDB3: High Density Bipolar Order 3 (E1).
linebldout Line build out value:

0-4

(T1)

0

0 to 133 Feet

1

133 to 266 Feet

2

266 to 399 Feet

3

399 to 533 Feet

4

533 to 655 Feet

1,3,5,7

(E1)

1

120 Ohm Normal

3

120 Ohm with Protection Resisters (Default)

5

120 Ohm with 14dB Return Loss

7

120 Ohm with 27dB Return Loss
robbedbit Boolean. TRUE = T1 line performing robbed bit signaling (ignored for E1).
loopmaster Boolean. TRUE = T1/E1 acting as loop master.

0-4	(T1)
0	0 to 133 Feet
1	133 to 266 Feet
2	266 to 399 Feet
3	399 to 533 Feet
4	533 to 655 Feet

1,3,5,7	(E1)
1	120 Ohm Normal
3	120 Ohm with Protection Resisters (Default)
5	120 Ohm with 14dB Return Loss
7	120 Ohm with 27dB Return Loss

Details

When a TX board has either a T1 or E1 daughter card, the communications processor must receive a T1/E1 configuration message for each of the lines (A and B). The T1/E1 configuration message identifies which line is providing the network connection (when referenced by main or Sec8K clock of MVIP configuration). The message also defines overall line settings for the T1/E1 line.

TxVpdT1E1Cfg

Description:

Prototype:

Details

See Also