Hello Jeff, thanks for your reply.
I have found this technical information about the DSL-2750B B1:
Device Interfaces
1x RJ-11 ADSL port
4x 10/100BASE-TX MDI/MDIX ports
802.11n WLAN
1x USB 2.0 port
Wireless
802.11b/g/n standards
Up to 300 Mbps (802.11n)
Frequency range: 2.4 GHz to 2.484 GHz
2x Non-detachable MIMO antennas
64/128-bit WEP data encryption
WPA /WPA 2 (personal/enterprise) security
802.1x RADIUS
WPS (Wi-Fi Protected Setup)
MAC address-based access control
ADSL standards
ADSL standards: Multi-mode, ANSI T1.413 Issue 2, ITU G.992.1 (G.dmt) Annex A, ITU G.992.2 (G.lite) Annex A, ITU G.994.1 (G.hs)
ADSL2 standards: ITU G.992.3 (G.dmt.bis) Annex A/L/M, ITU G.992.4 (G.lite.bis) Annex A
ADSL2+ standards: ITU G.992.5 Annex A/L/M
ADSL data rates
G.dmt: 8 Mbps downstream, 832 Kbps upstream
G.lite: 1.5 Mbps downstream, 512 Kbps upstream
ADSL2: 12 Mbps downstream, 1 Mbps upstream
ADSL2+: 24 Mbps downstream, 1 Mbps upstream
ATM & PPP protocols
ATM Adaptation Layer Type 5 (AAL5)
Bridged or routed Ethernet encapsulation
VC and LLC based multiplexing
PPP over Ethernet (PPPoE)
PPP over ATM (RFC 2364)
ITU-T I.610 OAM F4/F5
Network protocols
WAN/LAN Switchable Port
NAT (maximum 4096 NAT sessions)
DHCP server/client/relay
Universal Plug and Play (UPnP) Compliant
Dynamic Domain Name System (DDNS)
Virtual Server
Firewall/Access Security
Built-in NAT firewall
Stateful Packet Inspection (SPI)
DoS attack prevention
Packet filtering (IP/ICMP/TCP/UDP)
Intrusion Detection System (IDS)
DMZ
Parental Control (URL blocking, scheduling)
Virtual Private Network (VPN)
Multiple PPTP/IPSec/L2TP pass-through
Device Configuration/Management
Installation Wizard
Web-based GUI for configuration, firmware upgrade
Code lock to prevent improper firmware upgrade
Telnet
Syslog monitoring
Quality of Service (QoS)
LAN to WAN traffic prioritization/classification
Traffic Shaping
USB Applications:
Samba server
Printer server
Power Input
12 V / 1 A, external
Diagnostic LEDs
Power
LAN (1 to 4)
WLAN
DSL
Internet
WPS
USB
Dimensions (L x W x H)
182.8 x 127.8 x 32 mm
Weight
236 grams
Temperature
Operating: 0 to 40 ˚C
Storage: -20 to 70 ˚C
Humidity
5% to 95% non-condensing
Certifications
C-Tick
CE
FCC
IC
WHQL
Wi-Fi Certified
WPS
cat /proc/cpuinfo
system type : AW4339U
processor : 0
cpu model : Broadcom4350 V7.5
BogoMIPS : 319.48
wait instruction : yes
microsecond timers : yes
tlb_entries : 32
extra interrupt vector : no
hardware watchpoint : no
ASEs implemented :
shadow register sets : 1
core : 0
VCED exceptions : not available
VCEI exceptions : not available
cat /proc/meminfo
MemTotal: 60112 kB
MemFree: 25704 kB
Buffers: 3692 kB
Cached: 12736 kB
SwapCached: 0 kB
Active: 8844 kB
Inactive: 11336 kB
Active(anon): 3752 kB
Inactive(anon): 0 kB
Active(file): 5092 kB
Inactive(file): 11336 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 0 kB
Writeback: 0 kB
AnonPages: 3768 kB
Mapped: 4244 kB
Slab: 11080 kB
SReclaimable: 600 kB
SUnreclaim: 10480 kB
PageTables: 404 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 30056 kB
Committed_AS: 10292 kB
VmallocTotal: 1032148 kB
VmallocUsed: 2424 kB
VmallocChunk: 1009304 kB