9
10
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
DTE Data Rate
Off
Off
Off
Off
Off
1544 kbps (unframed)
Off
Off
Off
Off
On
56/64 kbps (n=1)
Off
Off
Off
On
Off
112/128 kbps (n=2)
Off
Off
Off
On
On
168/192 kbps (n=3)
Off
Off
On
Off
Off
224/256 kbps (n=4)
Off
Off
On
Off
On
280/320 kbps (n=5)
Off
Off
On
On
Off
336/384 kbps (n=6)
Off
Off
On
On
On
392/448 kbps (n=7)
Off
On
Off
Off
Off
448/512 kbps (n=8)
Off
On
Off
Off
On
504/576 kbps (n=9)
Off
On
Off
On
Off
560/640 kbps (n=10)
Off
On
Off
On
On
616/704 kbps (n=11)
Off
On
On
Off
Off
672/768 kbps (n=12)
Off
On
On
Off
On
728/832 kbps (n=13)
Off
On
On
On
Off
784/896 kbps (n=14)
Off
On
On
On
On
840/960 kbps (n=15)
On
Off
Off
Off
Off
896/1024 kbps (n=16)
On
Off
Off
Off
On
952/1088 kbps (n=17)
On
Off
Off
On
Off
1008/1152 kbps (n=18)
On
Off
Off
On
On
1064/1216 kbps (n=19)
On
Off
On
Off
Off
1120/1280 kbps (n=20)
On
Off
On
Off
On
1176/1344 kbps (n=21)
On
Off
On
On
Off
1232/1408 kbps (n=22)
On
Off
On
On
On
1288/1472 kbps (n=23)
On
On
Off
Off
Off
1344/1536 kbps (n=24)
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
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
T1 Starting Channel
SW1.3
SW1.2
SW1.1
SW2.8
SW2.7
(maximum value of n)
Off
Off
Off
Off
Off
1 (24)
Off
Off
Off
Off
On
2 (23)
Off
Off
Off
On
Off
3 (22)
Off
Off
Off
On
On
4 (21)
Off
Off
On
Off
Off
5 (20)
Off
Off
On
Off
On
6 (19)
Off
Off
On
On
Off
7 (18)
Off
Off
On
On
On
8 (17)
Off
On
Off
Off
Off
9 (16)
Off
On
Off
Off
On
10 (15)
Off
On
Off
On
Off
11 (14)
Off
On
Off
On
On
12 (13)
Off
On
On
Off
Off
13 (12)
Off
On
On
Off
On
14 (11)
Off
On
On
On
Off
15 (10)
Off
On
On
On
On
16 (9)
On
Off
Off
Off
Off
17 (8)
On
Off
Off
Off
On
18 (7)
On
Off
Off
On
Off
19 (6)
On
Off
Off
On
On
20 (5)
On
Off
On
Off
Off
21 (4)
On
Off
On
Off
On
22 (3)
On
Off
On
On
Off
23 (2)
On
Off
On
On
On
24 (1)
