Grandstream GXW4232 32-Port FXS Gateway with Dual Telco Connectors

The Grandstream GXW4232 connects 32 analog phones or faxes to an IP PBX over a Gigabit port, with 32 front RJ11 jacks and two rear 50-pin Telco connectors. It is built for mid-size hotels, small hospitals and office buildings with many analog handsets.

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The Grandstream GXW4232 is built for buildings that already have dozens of analog phones wired in, such as a 30-room hotel in Makkah or Madinah. It connects 32 phones or fax machines to an IP PBX over one Gigabit port, so you keep the room handsets and their cabling while gaining the features of a modern phone system.

What the Grandstream GXW4232 offers

Up front there are 32 RJ11 jacks and a backlit LCD. At the back you find two 50-pin Telco (RJ21) connectors, the network port and the DC input. All of it fits a 1U chassis 185 mm deep, the same size as the smaller models.

• 32 FXS ports, one SIP account per port.
• One 10/100/1000 Mbps RJ45 port.
• 4 SIP server profiles per device.
• 12V 5A adapter, 60W maximum.

Room and reception phones behind one number

With hunting groups you set one port as the active port with a SIP account, then add other ports that share it. That way reception or room-service phones answer a single internal number. Each port also handles call waiting, blind and attended transfer, three-way conferencing, paging and message waiting indication.

Two Telco connectors for clean cabling

In hotels and hospitals, phone wiring usually ends on a distribution frame in the server room. The two RJ21 connectors on the back let you link that frame with Telco cables instead of dozens of single leads, which keeps the rack tidy and maintenance simple.

Protection and operation

Over-voltage and over-current protection follows ITU-T K.21. Place the gateway in an air-conditioned equipment room.

Where the GXW4232 fits in Saudi Arabia

• Hotels in Makkah, Madinah and Riyadh upgrading the PBX but keeping room phones.
• Hospitals and larger clinics: nursing stations, wards and labs.
• Residential buildings and compounds with an internal phone in each apartment.
• Multi-floor office buildings with many analog desk phones.

Compatibility and management

The gateway registers to any SIP PBX via RFC 3261, and Grandstream lists zero-configuration provisioning with its UCM series. Manage it from the web UI, the GDMS cloud platform or TR-069. Calls are encrypted with SRTP and TLS, and the unit has secure boot and dual firmware images.

GXW4232, GXW4224 or GXW4248?

The GXW4224 has 24 RJ11 ports and one Telco connector; the GXW4232 has 32 ports and two. Both run on a 12V 5A adapter in a 185 mm deep chassis. The GXW4248 reaches 48 lines through two Telco connectors only, with no front RJ11 jacks, a 24V adapter and a deeper body. Choose the GXW4232 for 25 to 32 phones, or whenever you want direct RJ11 jacks on the front.

Frequently Asked Questions

Is the GXW4232 suitable for hotel room phones?

Yes. It connects up to 32 analog room phones to an IP PBX, each with its own extension.

How many Telco connectors does it have?

Two 50-pin (RJ21) connectors on the rear, in addition to 32 front RJ11 ports.

Specifications

• Model: GXW4232
• Series: GXW4200 (GXW4216 / GXW4224 / GXW4232 / GXW4248)
• Type: 32-port high-density FXS gateway
• Telephone interfaces: 32 × RJ11 FXS + 2 × 50-pin Telco (RJ21) connectors
• Network interface: 1 × 10/100/1000 Mbps auto-sensing RJ45
• LED indicators: Power, LAN link, LAN activity, per-port connection
• Display: Backlit graphic LCD, multi-language
• SIP accounts: 4 SIP server profiles per device, independent SIP account per port
• Signaling: SIP (RFC 3261) over UDP / TCP / TLS
• Network protocols: TCP/UDP, RTP/RTCP, HTTP/HTTPS, ARP, ICMP, DNS, DHCP, NTP, TFTP, PPPoE, STUN, LLDP
• Voice codecs: G.711, G.722 (wideband), G.723.1, G.726-32, G.729, iLBC, Opus
• Voice processing: Carrier-grade line echo cancellation, dynamic jitter buffer, modem detection and auto-switch to G.711
• Fax over IP: T.38 Group 3 fax relay up to 14.4 kbps, auto-switch to G.711 pass-through (V.17, V.21, V.27ter, V.29)
• Telephony features: Caller ID display or block, call waiting, blind or attended transfer, call forward, DND, 3-way conference, last call return, paging, MWI (NEON LED) and stutter tone, auto dial
• Caller ID: Bellcore Type 1 & 2, ETSI, BT, NTT, DTMF-based
• Disconnect methods: Busy tone, polarity reversal / wink, loop current
• Line reach: Up to 6000 ft on 24 AWG at 2 REN (short / long haul)
• DTMF: In-audio, RFC 2833, SIP INFO
• QoS: DiffServ, TOS, 802.1P/Q VLAN tagging
• Provisioning: TFTP, HTTP, HTTPS, FTP, FTPS, TR-069; zero-config provisioning with Grandstream UCM
• Security: SRTP, TLS/SIPS, HTTPS (AES-128), secure boot, unique certificate and random password per device, dual firmware images
• Management: Web UI, HTTPS, SSH, Syslog, voice prompt menu, TR-069, GDMS
• Failover SIP server: Yes, automatic switch to secondary server
• Power supply: External adapter: output 12VDC, 5A, 60W max; input 100 to 240VAC, 50 to 60Hz
• Protection: Over-voltage and over-current protection (ITU-T K.21 Basic Test Level)
• Mounting: Desktop or rack mount with front brackets (1U)
• Dimensions: 440 x 185 x 44 mm (1U)
• Weight: 2.76 kg
• Environment: Storage -10 to 60°C, humidity 10 to 90% non-condensing
• Compliance: FCC Part 15 Class B, IC ICES-003, CE (EN55032, EN55035, EN IEC 61000-3-2, EN61000-3-3, EN IEC 62368-1), RoHS, C-Tick, UL 60950 (adapter)
• In the box: Gateway, RJ45 Ethernet cable, 12V 5A power adapter, 2 rack-mount brackets, quick installation guide, regulatory paper

Features

• 32 FXS ports in 1U: 32 rooms or desks on a single gateway.
• Two 50-pin Telco connectors: tidy cabling to distribution frames in the server room.
• Hunting groups: put reception or room-service lines behind one number.
• Per-port 3-way conferencing and paging: PBX features on plain analog handsets.