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Switches SW1.8, SW1.7, SW1.6, SW1.5 & SW1.4
These switches set the DTE date rate. Each setting represents
an nx56/nx64 setting. The chart below shows the switch settings and
the acheived DTE data rate.
MODEL 2090 DTE DATA RATE
SW1.8 SW1.7 SW1.6 SW1.5 SW1.4
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
On
Off
Off
Off
On
Off
Off
On
Off
Off
Off
On
Off
Off
Off
On
On
Off
Off
On
On
Off
On
Off
Off
Off
On
Off
Off
Off
On
Off
On
Off
On
Off
On
Off
On
On
Off
Off
On
On
Off
Off
On
On
On
Off
On
On
On
On
Off
Off
Off
On
Off
Off
Off
On
Off
Off
On
On
Off
Off
On
On
Off
On
Off
On
Off
On
Off
On
Off
On
On
On
Off
On
On
On
On
Off
Off
Notes:
1. SW2.2 is used to set the DS0 rate to 56 kbps or 64 kbps.
2. For unframned operation, 1544 kbps, set SW1.8, SW1.7,
SW1.6, SW1.5 & SW1.4 to OFF
9
DTE Data Rate
Off
1544 kbps (unframed)
On
56/64 kbps (n=1)
Off
112/128 kbps (n=2)
On
168/192 kbps (n=3)
Off
224/256 kbps (n=4)
On
280/320 kbps (n=5)
Off
336/384 kbps (n=6)
On
392/448 kbps (n=7)
Off
448/512 kbps (n=8)
On
504/576 kbps (n=9)
Off
560/640 kbps (n=10)
On
616/704 kbps (n=11)
Off
672/768 kbps (n=12)
On
728/832 kbps (n=13)
Off
784/896 kbps (n=14)
On
840/960 kbps (n=15)
Off
896/1024 kbps (n=16)
On
952/1088 kbps (n=17)
Off
1008/1152 kbps (n=18)
On
1064/1216 kbps (n=19)
Off
1120/1280 kbps (n=20)
On
1176/1344 kbps (n=21)
Off
1232/1408 kbps (n=22)
On
1288/1472 kbps (n=23)
Off
1344/1536 kbps (n=24)
Switches SW1.1 SW1.2, SW1.3, SW 2.7 & SW2.8
These switches set the starting channel. The starting channel is
the first channel that carries valid data. This channel can be set to any
value between 1 and 24. All additional channels are arranges in con-
tiguous order. If the starting channel is other than 1, then the maxi-
mum possible bandwidth will be less than 1536 kbps. For example, if
the starting channel is set to be 12, then the maximum bandwidth is
limited to 13x64 kbps (channels 12~24), or 832 kbps. This must be
kept in mind when setting the starting channel. The Model 2090 will
flash the ERR indicator LED if the switch setting is invalid. Refer to
section 5.1 for a more detailed explanation of the ERR LED function.
T1 STARTING CHANNEL
SW1.3 SW1.2 SW1.1 SW2.8 SW2.7 (maximum value of n)
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
On
Off
Off
Off
On
Off
Off
On
Off
Off
Off
On
Off
Off
Off
On
On
Off
Off
On
On
Off
On
Off
Off
Off
On
Off
Off
Off
On
Off
On
Off
On
Off
On
Off
On
On
Off
Off
On
On
Off
Off
On
On
On
Off
On
On
On
On
Off
Off
Off
On
Off
Off
Off
On
Off
Off
On
On
Off
Off
On
On
Off
On
Off
On
Off
On
Off
On
Off
On
On
On
Off
On
On
T1 Starting Channel
Off
1 (24)
On
2 (23)
Off
3 (22)
On
4 (21)
Off
5 (20)
On
6 (19)
Off
7 (18)
On
8 (17)
Off
9 (16)
On
10 (15)
Off
11 (14)
On
12 (13)
Off
13 (12)
On
14 (11)
Off
15 (10)
On
16 (9)
Off
17 (8)
On
18 (7)
Off
19 (6)
On
20 (5)
Off
21 (4)
On
22 (3)
Off
23 (2)
On
24 (1)
10
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