MG8702: There are 34 Downstream Bonded Channels. ONLY ONE Upstream Bonded Channels

Hello,

I had problems to activate the XB7-CM on June 30, 2026 :
When Powering up the XB7-CM (after the coaxial cable and power supper are connected to the XB7-CM),
The Bottom four ethernet ports light up for awhile and then all lights off !!!!!

I decided to activate my Motorola MG8702 
by calling 1-855-652-3446 with customer support for about 50 minutes.
The MG8702 was able to connect to internet.

Now I need your help for the following issue:(??)
It took 6-10 minutes for the upstream light to be solid blue !!

There is ONLY ONE Upstream Channels (Normally there should be 4 Upstream Channels for MG8702).
Speeds of the Wi-Fi Devices: Download speed is GOOD; But upload speed is about 6 Mbps 
(normally at least 10 Mbps for MG8702 for the 300 Mbps plan)..

"MG8702.Connection.34Downstream Bonded Channels. ONLY ONE Upstream Bonded Channels"

The event log shows a lot of the following
Event Log
    Time    Priority    Description 
Mon Jun 1 2026    Critical (3)   UCD invalid or channel unusable;
    19:38:46
Mon Jun 1 2026    Critical (3)   No Ranging Response received - T3 time-out;
    19:38:46
Mon Jun 1 2026    Critical (3)   UCD invalid or channel unusable;
    19:38:46
Mon Jun 1 2026    Critical (3)   No Ranging Response received - T3 time-out;
    19:38:47

Critical (3)   UCD invalid or channel unusable;
    
The "UCD invalid or channel unusable" critical error on your Motorola MG8702 means 
your modem has lost communication with the ISP’s central equipment (CMTS). 
This is almost always caused by severe line noise (ingress) or 
damaged physical cables outside your home rather than the modem itself.

Critical (3)   No Ranging Response received - T3 time-out;

A "No Ranging Response received - T3 time-out" in your modem logs means 
your cable router is trying to communicate with your ISP, 
but its signals are being lost or corrupted before they reach the network

I have performed the followings several times:
1. Reset the MG8702 to Factory settings
2. Power down; Disconnect the Coaxial cable; Reconnect the Coaxial cable; Power up;
   Same result...

Please advise

TIA
Henry

P.S.

Downstream Bonded Channels --  34   
Channel Lock Status Modulation Channel ID Freq. (MHz) Pwr (dBmV) SNR (dB) Corrected Uncorrected
   1 Locked QAM256 4 429.0 8.2 44.3 0 0
   2 Locked QAM256 1 411.0 8.3 44.2 0 0
   3 Locked QAM256 2 417.0 8.3 44.4 0 0
   4 Locked QAM256 3 423.0 8.3 44.4 0 0
   5 Locked QAM256 5 435.0 8.3 44.2 0 0
   6 Locked QAM256 6 441.0 8.1 44.4 0 0
   7 Locked QAM256 7 447.0 8.3 44.3 0 0
   8 Locked QAM256 8 453.0 8.3 44.2 0 0
   9 Locked QAM256 9 459.0 8.4 44.3 0 0
   10 Locked QAM256 10 465.0 8.5 44.4 0 0
   11 Locked QAM256 11 471.0 8.8 44.4 0 0
   12 Locked QAM256 12 477.0 9.0 44.5 0 0
   13 Locked QAM256 13 483.0 9.1 44.5 0 0
   14 Locked QAM256 14 489.0 9.4 44.7 0 0
   15 Locked QAM256 15 495.0 9.9 43.9 0 0
   16 Locked QAM256 16 501.0 11.2 44.2 0 0
   17 Locked QAM256 17 507.0 10.0 44.9 0 0
   18 Locked QAM256 18 513.0 9.9 45.1 0 0
   19 Locked QAM256 19 519.0 10.0 45.1 0 0
   20 Locked QAM256 20 525.0 10.2 45.1 0 0
   21 Locked QAM256 21 531.0 10.1 45.2 0 0
   22 Locked QAM256 22 537.0 10.1 45.0 0 0
   23 Locked QAM256 23 543.0 10.3 45.2 0 0
   24 Locked QAM256 24 549.0 9.9 45.0 0 0
   25 Locked QAM256 25 555.0 9.9 45.0 0 0
   26 Locked QAM256 26 561.0 9.9 45.1 0 0
   27 Locked QAM256 27 567.0 9.6 44.9 0 0
   28 Locked QAM256 28 573.0 9.4 44.7 0 0
   29 Locked QAM256 29 579.0 9.5 44.8 0 0
   30 Locked QAM256 30 585.0 9.2 44.7 0 0
   31 Locked QAM256 31 591.0 9.1 44.7 0 0
   32 Locked QAM256 32 597.0 9.1 44.6 0 0
   33 Locked OFDM PLC 193 690.0 8.9 43.7 78575634 0
   34 Locked OFDM PLC 194 957.0 10.6 44.1 18003495 0

   Upstream Bonded Channels  -- ONLY ONE    
  
   Channel Lock Status Channel Type Channel ID Symb. Rate (Ksym/sec) Freq. (MHz) Pwr (dBmV)
   1 Locked SC-QAM 4 5120 35.6 42.0