Nortel Meridian 1 Option 11C Manual page 26

Page 26 of 126 2.0 Mb DTI Implementation
N
EDGE 0
1
TIME 40-(240)-480
SASU 0-(1920)-8064
MFAO YES (NO)
<CR>
SZNI YES (NO)
MFF CRC
(AFF)
553-3011-315 Standard 13.00
If METR(R) signal not required
PPM bit counted when changed from 1 to 0.
PPM bit counted when changed from 0 to 1.
Maximum time METR signal can be on in milliseconds.
Seize acknowledge supervision period in milliseconds.
2.0 Mb DTI default = 1920
DTI card will or will not set bit 3 of timeslot 0 if loss of
Multiframe Alignment Signal (MFAS) occurs.
2.0 Mb DTI default = NO
<cr> = no change is required
PSTN incoming seizure during lockout of MFAS and far-end
fault states allowed (denied)
Multiframe format - Cyclic Redundancy Check (CRC 4)
Alternative Frame Format
Note: Prompted for Option 11C only. For non Option 11C
only AFF is supported.
The following prompts and associated responses define the grade of service
timers for the DTI card. Group I problems are treated individually. They are
bipolar violations, bit error rate (frame alignment) slips and CRC-4 errors.
Group II problems are treated as a group. They are bit 3 of TS0 (far end out
of service), bit 6 of TS16 (far end lost multiframe alignment), AIS (alarm
indication signal), loss of frame alignment and loss of multiframe alignment.
Responses are interpreted as follows:
• mt = maintenance threshold time.
• ct = new call suppression (hardware service removal) threshold time.
• ot = out of service threshold time.
• dt = no new data calls suppression threshold time.
Each of the response times are expressed as follows:
• nnnY = time in milliseconds where nnnn = 20-5000 (input to nearest 20
milliseconds.)
• nnnS = time in seconds where nnn = 1-240
January 2002