Verilink PRISM 3021 (34-00262) Product Manual Instrukcja Użytkownika Pobierz pdf (Strona 12)

2-4 Installation

PRISM 3021

OOT

ODE

Position S3-5 and S3-6 select the boot mode as shown in

Table 2 - J.

DTE R

ATE

ULTIPLIER

Position S3-7 is used to select the DTE rate multiplier as

shown in Table 2-K. The switch is used in conjunction with

switch S4 to determine the DTE rate.

HANNEL

SSIGNMENT

Position S3-8 selects the channel assignment mode as shown in

Table 2-L for network E1 DS0s that carry data to the high-speed

port. Contiguous channel mode assigns the channels as a block

beginning at channel one. For example, if the high-speed port data

rate is 256 kbps (as shown in Table 2-N on page 2-5), the unit

would assign network channels 1 through 4 to the high-speed port.

Alternate channel mode assigns an idle channel following

each data channel. Using the example above, data is carried

on channels 1, 3, 5, and 7 while channels 2, 4, 6, and 8 are

set idle (binary code 01111111). The advantage of alternate

channel assignment is that E1 ones-density requirements are

maintained by the idle channels rather than placing any

restriction on the high-speed data.

National Bit Selection SW1

SW1 is located as shown in Figure 2-5 and is used to

choose a national bit to create a 4-kbps datalink between the

endpoint units. Both endpoint units must have the same

national bit selected to utilize the datalink. The national bit

is selected as shown in Table 2-M.

Table 2-J Boot Mode

Mode S3-5 S3-6

Switches

Down Down

RAM Down Up

ROM Up Down

Reserved for future expansion. Up Up

Table 2-K DTE Rate Multiplier

DTE Rate Multiplier S3-7

64 Down

56 Up

Table 2-L Channel Assignment

Channel Assignment S3-8

Contiguous

Down

Alternating Up

Figure 2-5 B

OTTOM

-E

DGE

IEW

RISM

3021

Switch S1

18765432

Switch SW1

(E1-DTE Option Card)

Table 2-M National Bit

National Bit Switch Position

None 0

SA4

SA5 2

SA6 3

SA7 4

SA8 5

None 6-9

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 46 47

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