Problema del router o telefonica? CT-5361 (A101-220TLF

Nas, m creo pelota de tenis! Telefonica srv. Tec. Me dice que es culpa del router y comtrem ser. Garantia me dice que es culpa de la line, vaya telefonica.
Se me corta la conexión DSL cada por tiempo cada 10 20 minutos o a veces toi dos o tres días bien:
(Tres cortes en menos de media hora)
Oct 26 20:34:11 user crit klogd: ADSL link down
Oct 26 20:34:12 daemon crit pppd[471]: Clear IP addresses. Connection DOWN.
Oct 26 20:34:12 daemon crit pppd[471]: Clear IP addresses. PPP connection DOWN.
Oct 26 20:34:13 user crit klogd: ADSL G.994 training
Oct 26 20:34:18 user crit klogd: ADSL G.992 started
Oct 26 20:34:22 user crit klogd: ADSL G.992 channel analysis
Oct 26 20:34:27 user crit klogd: ADSL G.992 message exchange
Oct 26 20:34:27 user crit klogd: ADSL link up, interleaved, us=317, ds=3004
Oct 26 20:34:56 daemon crit pppd[471]: PPP server detected.
Oct 26 20:34:56 daemon crit pppd[471]: PPP session established.
Oct 26 20:34:58 daemon crit pppd[471]: PPP LCP UP.
Oct 26 20:34:59 daemon crit pppd[471]: Received valid IP address from server. Connection UP.
Oct 26 20:42:21 user crit klogd: ADSL link down
Oct 26 20:42:23 user crit klogd: ADSL G.994 training
Oct 26 20:42:24 daemon crit pppd[471]: Clear IP addresses. Connection DOWN.
Oct 26 20:42:24 daemon crit pppd[471]: Clear IP addresses. PPP connection DOWN.
Oct 26 20:42:29 user crit klogd: ADSL G.992 started
Oct 26 20:42:33 user crit klogd: ADSL G.992 channel analysis
Oct 26 20:42:37 user crit klogd: ADSL G.992 message exchange
Oct 26 20:42:37 user crit klogd: ADSL link up, interleaved, us=314, ds=3004
Oct 26 20:43:07 daemon crit pppd[471]: PPP server detected.
Oct 26 20:43:07 daemon crit pppd[471]: PPP session established.
Oct 26 20:43:09 daemon crit pppd[471]: PPP LCP UP.
Oct 26 20:43:09 daemon crit pppd[471]: Received valid IP address from server. Connection UP.
Oct 26 20:59:01 user crit klogd: ADSL link down
Oct 26 20:59:01 daemon crit pppd[471]: Clear IP addresses. Connection DOWN.
Oct 26 20:59:01 daemon crit pppd[471]: Clear IP addresses. PPP connection DOWN.
Oct 26 20:59:02 user crit klogd: ADSL G.994 training
Oct 26 20:59:08 user crit klogd: ADSL G.992 started
Oct 26 20:59:12 user crit klogd: ADSL G.992 channel analysis
Oct 26 20:59:16 user crit klogd: ADSL G.992 message exchange
Oct 26 20:59:17 user crit klogd: ADSL link up, interleaved, us=314, ds=3004
Oct 26 20:59:46 daemon crit pppd[471]: PPP server detected.
Oct 26 20:59:46 daemon crit pppd[471]: PPP session established.
Oct 26 20:59:48 daemon crit pppd[471]: PPP LCP UP.
Oct 26 20:59:48 daemon crit pppd[471]: Received valid IP address from server. Connection UP
Comtrem me dice que esto es culpa de telefonica ya que:
"Test the connection to your Internet service provider"
"Ping default gateway: FAIL "
Y eso es defecto de la linea, y que si me envían un router "reparado" me seguirá fallando y el que yo les envíe como "estropeado" si esta bien me lo cobraran ! Y se lo quedaran! (Es decir que cobran 2 router solo venden 1! Yo también quiero un negocio así)
Y telefónica dice que no sabe que es eso del
"Ping default gateway: FAIL"
(Que son fruteros en vez de técnicos) me hacen hacer un ping a terra. Es y me dicen que esta bien.
Ya lo he probado todo, creo, activar calidad de servicio, Rip, Snmp, Lan -> enble/disbl Upn, IGMP-Snooping, Wan -> DNS 80.58.0.33,80.58.32.97,80.58.61.250-254, En/Dis quality service, DSL-> Todas, o solo ADSL2, T1.413, G.Dmt y algunas otras combinaciones.
Ahora si, si pongo el 3com812 ese funciona de maravilla, con un ping más bajo en los juegos on-line, y me quedo sin wireless, pero no se cuelga.
Otros Datos:
Statistics -- ADSL
Mode: ADSL2+
Type:
Line Coding: Trellis On
Status: No Defect
Link Power State: L0
Downstream Upstream
SNR Margin (dB): 30.4 21.0
Attenuation (dB): 41.5 18.8
Output Power (dBm): 921.6 12.4
Attainable Rate (Kbps): 13072 388
Rate (Kbps): 3004 317
MSGc (number of bytes in overhead channel message): 91 72
B (number of bytes in Mux Data Frame): 62 9
M (number of Mux Data Frames in FEC Data Frame): 1 16
T (Mux Data Frames over sync bytes): 1 1
R (number of check bytes in FEC Data Frame): 14 16
S (ratio of FEC over PMD Data Frame length): 0.6602 14.5155
L (number of bits in PMD Data Frame): 933 97
D (interleaver depth): 64 4
Super Frames: 53889 53887
Super Frame Errors: 0 1
RS Words: 5227308 229019
RS Correctable Errors: 7 587202560
RS Uncorrectable Errors: 0 N/A
HEC Errors: 0 0
OCD Errors: 0 0
LCD Errors: 0 0
Total Cells: 6120771 N/A
Data Cells: 1025 N/A
Bit Errors: 0 N/A
Total ES: 0 1
Total SES: 0 0
Total UAS: 13 24
ADSL VER Test - Result
The ADSL BER test completed successfully.
Test Time (sec): 20
Total Transferred Bits: 54412416
Total Error Bits: 2
Error Ratio: 2.79e-09
Así que por favor si a hay alguien que sepa que me puede pasar o que pruebas puedo realizar al router o a la linea...