Verilink PRISM 3101 (34-00212) Product Manual Instrukcja Użytkownika Pobierz pdf (Strona 18)

Configuration 3-2

PRISM 3101/3102

ones density requirements of the T1 network line must be

ensured in this mode. Refer to the section entitled

Line Parameters on page 3-10 for more information.

Selecting Nx56K (Up) allows port bit rates that are multi-

ples of 56 kbps. The unit maintains ones density for the

selected DS0 channel in this mode.

Data Port 2: Switch S1-8 sets the multiplier for Data Port

2 on the 3102 only. The unit can operate at any data rate that

is a multiple of 56 or 64 kbps. Selecting Nx64K

(Dn) pro-

vides port bit rates that are multiples of 64 kbps. The ones

density requirements of the T1 network line must be

ensured in this mode. Refer to the section entitled

Line Parameters on page 3-10 for more information.

Selecting Nx56K (Up) allows port bit rates that are multi-

ples of 56 kbps. The unit maintains ones density for the

selected DS0 channel in this mode.

Switch S2

Switch S2 (Figure 3-3) configures parameters for Network

Framing, Network Coding, Network LBO, Timing Source,

Test Button loop Code, and Test Button Mode.

Network Framing: Switch S2-1 matches the unit to the

network line framing as either ESF (Dn)

or D4 (Up).

Network Coding: Switch S2-2 sets the network line cod-

ing to either B8ZS (Dn)

or AMI (Up).

Network LBO: Switch S2-3 and S2-4 set the line build

out signal level of the transmit data (TXD) from the unit to

the network. The telephone company can provide the

proper setting.

If unsure of the exact setting, leave it at the

default value. Table 3-C lists the available levels.

Timing Source: Switch S2-5 and S2-6 determine the unit

clocking source. The most common timing source for CSU/

DSU applications is the network. The 3101/3102 may also

be optioned to time from an internal standard or from the

high speed data interface as shown in Table 3-D.

Test Button Loop Code: Switch S2-7 selects either an

inband line loopback code (Dn)

or an inband V.54 loop code

(Up) for use with the front panel test button. On the 3102

model, this switch applies to Data Port 1 only.

Test Button Mode: Switch S2-8 selects the test button

operation mode as either BERT (Dn)

or Clear (Up).

Switch S3

Switch S3 (Figure 3-4) sets the Port 1 and Port 2 bit rates as

shown in Table 3-E. Positions S3-6 through S3-10 are not

applicable on the 3101.

Table 3-C Network LBO

S2-3 S2-4 Network LBO

Dn 0 dB

Up Dn -7.5 dB

Dn Up -15.0 dB

Up Up -22.5 dB

7654321

Dn Up

Network

Test Button

Framing

Coding

Mode

Loop Code

Timing

Source

LBO

Network

LBO

Switch

Timing

Source

Figure 3-3 Switch S2

Table 3-D Timing Source

S2-5 S2-6 Timing Source

Dn Network

Up Dn Internal

Dn Up Port 1 EXC

Up Up T1 DTE

Table 3-E Port 1/Port 2 Bit Rates

# of

DS0s

S1-7 Up S1-7 Dn S3-1 S3-2 S3-3 S3-4 S3-5

S1-8 Up S1-8 Dn S3-6 S3-7 S3-8 S3-9 S3-10

Disable

Disable Dn Dn Dn Dn Dn

1 56 kbps 64 kbps Up Dn Dn Dn Dn

2 112 128 Dn Up Dn Dn Dn

3 168 192 Up Up Dn Dn Dn

4 224 256 Dn Dn Up Dn Dn

5 280 320 Up Dn Up Dn Dn

6 336 384 Dn Up Up Dn Dn

7 392 448 Up Up Up Dn Dn

8 448 512 Dn Dn Dn Up Dn

9 504 576 Up Dn Dn Up Dn

10 560 640 Dn Up Dn Up Dn

11 616 704 Up Up Dn Up Dn

12 672 768 Dn Dn Up Up Dn

13 728 832 Up Dn Up Up Dn

14 784 896 Dn Up Up Up Dn

15 840 960 Up Up Up Up Dn

16 896 1024 Dn Dn Dn Dn Up

17 952 1088 Up Dn Dn Dn Up

18 1008 1152 Dn Up Dn Dn Up

19 1064 1216 Up Up Dn Dn Up

20 1120 1280 Dn Dn Up Dn Up

21 1176 1344 Up Dn Up Dn Up

22 1232 1408 Dn Up Up Dn Up

23 1288 1472 Up Up Up Dn Up

24 1344 1536 Dn Dn Dn Up Up

8765431

Dn Up

Switch

2 9

Port 1 Bit Rate

Port 2 Bit Rate

Figure 3-4 Switch S3

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 46 47

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